| /* |
| * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.datatransfer; |
| |
| import java.awt.AWTError; |
| import java.awt.EventQueue; |
| import java.awt.Image; |
| import java.awt.Graphics; |
| |
| import java.awt.datatransfer.DataFlavor; |
| import java.awt.datatransfer.FlavorMap; |
| import java.awt.datatransfer.FlavorTable; |
| import java.awt.datatransfer.Transferable; |
| import java.awt.datatransfer.UnsupportedFlavorException; |
| |
| import java.io.BufferedReader; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Reader; |
| import java.io.SequenceInputStream; |
| import java.io.StringReader; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.IllegalCharsetNameException; |
| import java.nio.charset.UnsupportedCharsetException; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.security.ProtectionDomain; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.SortedMap; |
| import java.util.SortedSet; |
| import java.util.Set; |
| import java.util.Stack; |
| import java.util.TreeMap; |
| import java.util.TreeSet; |
| |
| import sun.util.logging.PlatformLogger; |
| |
| import sun.awt.AppContext; |
| import sun.awt.SunToolkit; |
| |
| import java.awt.image.BufferedImage; |
| import java.awt.image.ImageObserver; |
| import java.awt.image.RenderedImage; |
| import java.awt.image.WritableRaster; |
| import java.awt.image.ColorModel; |
| |
| import javax.imageio.ImageIO; |
| import javax.imageio.ImageReader; |
| import javax.imageio.ImageReadParam; |
| import javax.imageio.ImageWriter; |
| import javax.imageio.ImageTypeSpecifier; |
| |
| import javax.imageio.spi.ImageWriterSpi; |
| |
| import javax.imageio.stream.ImageInputStream; |
| import javax.imageio.stream.ImageOutputStream; |
| |
| import sun.awt.image.ImageRepresentation; |
| import sun.awt.image.ToolkitImage; |
| |
| import java.io.FilePermission; |
| |
| |
| /** |
| * Provides a set of functions to be shared among the DataFlavor class and |
| * platform-specific data transfer implementations. |
| * |
| * The concept of "flavors" and "natives" is extended to include "formats", |
| * which are the numeric values Win32 and X11 use to express particular data |
| * types. Like FlavorMap, which provides getNativesForFlavors(DataFlavor[]) and |
| * getFlavorsForNatives(String[]) functions, DataTransferer provides a set |
| * of getFormatsFor(Transferable|Flavor|Flavors) and |
| * getFlavorsFor(Format|Formats) functions. |
| * |
| * Also provided are functions for translating a Transferable into a byte |
| * array, given a source DataFlavor and a target format, and for translating |
| * a byte array or InputStream into an Object, given a source format and |
| * a target DataFlavor. |
| * |
| * @author David Mendenhall |
| * @author Danila Sinopalnikov |
| * |
| * @since 1.3.1 |
| */ |
| public abstract class DataTransferer { |
| |
| /** |
| * Cached value of Class.forName("[C"); |
| */ |
| public static final Class charArrayClass; |
| |
| /** |
| * Cached value of Class.forName("[B"); |
| */ |
| public static final Class byteArrayClass; |
| |
| /** |
| * The <code>DataFlavor</code> representing plain text with Unicode |
| * encoding, where: |
| * <pre> |
| * representationClass = java.lang.String |
| * mimeType = "text/plain; charset=Unicode" |
| * </pre> |
| */ |
| public static final DataFlavor plainTextStringFlavor; |
| |
| /** |
| * The <code>DataFlavor</code> representing a Java text encoding String |
| * encoded in UTF-8, where |
| * <pre> |
| * representationClass = [B |
| * mimeType = "application/x-java-text-encoding" |
| * </pre> |
| */ |
| public static final DataFlavor javaTextEncodingFlavor; |
| |
| /** |
| * Lazy initialization of Standard Encodings. |
| */ |
| private static class StandardEncodingsHolder { |
| private static final SortedSet standardEncodings = load(); |
| |
| private static SortedSet load() { |
| final Comparator comparator = |
| new CharsetComparator(IndexedComparator.SELECT_WORST); |
| final SortedSet tempSet = new TreeSet(comparator); |
| tempSet.add("US-ASCII"); |
| tempSet.add("ISO-8859-1"); |
| tempSet.add("UTF-8"); |
| tempSet.add("UTF-16BE"); |
| tempSet.add("UTF-16LE"); |
| tempSet.add("UTF-16"); |
| tempSet.add(getDefaultTextCharset()); |
| return Collections.unmodifiableSortedSet(tempSet); |
| } |
| } |
| |
| /** |
| * Tracks whether a particular text/* MIME type supports the charset |
| * parameter. The Map is initialized with all of the standard MIME types |
| * listed in the DataFlavor.selectBestTextFlavor method comment. Additional |
| * entries may be added during the life of the JRE for text/<other> types. |
| */ |
| private static final Map textMIMESubtypeCharsetSupport; |
| |
| /** |
| * Cache of the platform default encoding as specified in the |
| * "file.encoding" system property. |
| */ |
| private static String defaultEncoding; |
| |
| /** |
| * A collection of all natives listed in flavormap.properties with |
| * a primary MIME type of "text". |
| */ |
| private static final Set textNatives = |
| Collections.synchronizedSet(new HashSet()); |
| |
| /** |
| * The native encodings/charsets for the Set of textNatives. |
| */ |
| private static final Map nativeCharsets = |
| Collections.synchronizedMap(new HashMap()); |
| |
| /** |
| * The end-of-line markers for the Set of textNatives. |
| */ |
| private static final Map nativeEOLNs = |
| Collections.synchronizedMap(new HashMap()); |
| |
| /** |
| * The number of terminating NUL bytes for the Set of textNatives. |
| */ |
| private static final Map nativeTerminators = |
| Collections.synchronizedMap(new HashMap()); |
| |
| /** |
| * The key used to store pending data conversion requests for an AppContext. |
| */ |
| private static final String DATA_CONVERTER_KEY = "DATA_CONVERTER_KEY"; |
| |
| /** |
| * The singleton DataTransferer instance. It is created during MToolkit |
| * or WToolkit initialization. |
| */ |
| private static DataTransferer transferer; |
| |
| private static final PlatformLogger dtLog = PlatformLogger.getLogger("sun.awt.datatransfer.DataTransfer"); |
| |
| static { |
| Class tCharArrayClass = null, tByteArrayClass = null; |
| try { |
| tCharArrayClass = Class.forName("[C"); |
| tByteArrayClass = Class.forName("[B"); |
| } catch (ClassNotFoundException cannotHappen) { |
| } |
| charArrayClass = tCharArrayClass; |
| byteArrayClass = tByteArrayClass; |
| |
| DataFlavor tPlainTextStringFlavor = null; |
| try { |
| tPlainTextStringFlavor = new DataFlavor |
| ("text/plain;charset=Unicode;class=java.lang.String"); |
| } catch (ClassNotFoundException cannotHappen) { |
| } |
| plainTextStringFlavor = tPlainTextStringFlavor; |
| |
| DataFlavor tJavaTextEncodingFlavor = null; |
| try { |
| tJavaTextEncodingFlavor = new DataFlavor |
| ("application/x-java-text-encoding;class=\"[B\""); |
| } catch (ClassNotFoundException cannotHappen) { |
| } |
| javaTextEncodingFlavor = tJavaTextEncodingFlavor; |
| |
| Map tempMap = new HashMap(17); |
| tempMap.put("sgml", Boolean.TRUE); |
| tempMap.put("xml", Boolean.TRUE); |
| tempMap.put("html", Boolean.TRUE); |
| tempMap.put("enriched", Boolean.TRUE); |
| tempMap.put("richtext", Boolean.TRUE); |
| tempMap.put("uri-list", Boolean.TRUE); |
| tempMap.put("directory", Boolean.TRUE); |
| tempMap.put("css", Boolean.TRUE); |
| tempMap.put("calendar", Boolean.TRUE); |
| tempMap.put("plain", Boolean.TRUE); |
| tempMap.put("rtf", Boolean.FALSE); |
| tempMap.put("tab-separated-values", Boolean.FALSE); |
| tempMap.put("t140", Boolean.FALSE); |
| tempMap.put("rfc822-headers", Boolean.FALSE); |
| tempMap.put("parityfec", Boolean.FALSE); |
| textMIMESubtypeCharsetSupport = Collections.synchronizedMap(tempMap); |
| } |
| |
| /** |
| * The accessor method for the singleton DataTransferer instance. Note |
| * that in a headless environment, there may be no DataTransferer instance; |
| * instead, null will be returned. |
| */ |
| public static DataTransferer getInstance() { |
| synchronized (DataTransferer.class) { |
| if (transferer == null) { |
| final String name = SunToolkit.getDataTransfererClassName(); |
| if (name != null) { |
| PrivilegedAction<DataTransferer> action = new PrivilegedAction<DataTransferer>() |
| { |
| public DataTransferer run() { |
| Class cls = null; |
| Method method = null; |
| DataTransferer ret = null; |
| |
| try { |
| cls = Class.forName(name); |
| } catch (ClassNotFoundException e) { |
| ClassLoader cl = ClassLoader. |
| getSystemClassLoader(); |
| if (cl != null) { |
| try { |
| cls = cl.loadClass(name); |
| } catch (ClassNotFoundException ee) { |
| ee.printStackTrace(); |
| throw new AWTError("DataTransferer not found: " + name); |
| } |
| } |
| } |
| if (cls != null) { |
| try { |
| method = cls.getDeclaredMethod("getInstanceImpl"); |
| method.setAccessible(true); |
| } catch (NoSuchMethodException e) { |
| e.printStackTrace(); |
| throw new AWTError("Cannot instantiate DataTransferer: " + name); |
| } catch (SecurityException e) { |
| e.printStackTrace(); |
| throw new AWTError("Access is denied for DataTransferer: " + name); |
| } |
| } |
| if (method != null) { |
| try { |
| ret = (DataTransferer) method.invoke(null); |
| } catch (InvocationTargetException e) { |
| e.printStackTrace(); |
| throw new AWTError("Cannot instantiate DataTransferer: " + name); |
| } catch (IllegalAccessException e) { |
| e.printStackTrace(); |
| throw new AWTError("Cannot access DataTransferer: " + name); |
| } |
| } |
| return ret; |
| } |
| }; |
| transferer = AccessController.doPrivileged(action); |
| } |
| } |
| } |
| return transferer; |
| } |
| |
| /** |
| * Converts an arbitrary text encoding to its canonical name. |
| */ |
| public static String canonicalName(String encoding) { |
| if (encoding == null) { |
| return null; |
| } |
| try { |
| return Charset.forName(encoding).name(); |
| } catch (IllegalCharsetNameException icne) { |
| return encoding; |
| } catch (UnsupportedCharsetException uce) { |
| return encoding; |
| } |
| } |
| |
| /** |
| * If the specified flavor is a text flavor which supports the "charset" |
| * parameter, then this method returns that parameter, or the default |
| * charset if no such parameter was specified at construction. For non- |
| * text DataFlavors, and for non-charset text flavors, this method returns |
| * null. |
| */ |
| public static String getTextCharset(DataFlavor flavor) { |
| if (!isFlavorCharsetTextType(flavor)) { |
| return null; |
| } |
| |
| String encoding = flavor.getParameter("charset"); |
| |
| return (encoding != null) ? encoding : getDefaultTextCharset(); |
| } |
| |
| /** |
| * Returns the platform's default character encoding. |
| */ |
| public static String getDefaultTextCharset() { |
| if (defaultEncoding != null) { |
| return defaultEncoding; |
| } |
| return defaultEncoding = Charset.defaultCharset().name(); |
| } |
| |
| /** |
| * Tests only whether the flavor's MIME type supports the charset |
| * parameter. Must only be called for flavors with a primary type of |
| * "text". |
| */ |
| public static boolean doesSubtypeSupportCharset(DataFlavor flavor) { |
| if (dtLog.isLoggable(PlatformLogger.FINE)) { |
| if (!"text".equals(flavor.getPrimaryType())) { |
| dtLog.fine("Assertion (\"text\".equals(flavor.getPrimaryType())) failed"); |
| } |
| } |
| |
| String subType = flavor.getSubType(); |
| if (subType == null) { |
| return false; |
| } |
| |
| Object support = textMIMESubtypeCharsetSupport.get(subType); |
| |
| if (support != null) { |
| return (support == Boolean.TRUE); |
| } |
| |
| boolean ret_val = (flavor.getParameter("charset") != null); |
| textMIMESubtypeCharsetSupport.put |
| (subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE); |
| return ret_val; |
| } |
| public static boolean doesSubtypeSupportCharset(String subType, |
| String charset) |
| { |
| Object support = textMIMESubtypeCharsetSupport.get(subType); |
| |
| if (support != null) { |
| return (support == Boolean.TRUE); |
| } |
| |
| boolean ret_val = (charset != null); |
| textMIMESubtypeCharsetSupport.put |
| (subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE); |
| return ret_val; |
| } |
| |
| /** |
| * Returns whether this flavor is a text type which supports the |
| * 'charset' parameter. |
| */ |
| public static boolean isFlavorCharsetTextType(DataFlavor flavor) { |
| // Although stringFlavor doesn't actually support the charset |
| // parameter (because its primary MIME type is not "text"), it should |
| // be treated as though it does. stringFlavor is semantically |
| // equivalent to "text/plain" data. |
| if (DataFlavor.stringFlavor.equals(flavor)) { |
| return true; |
| } |
| |
| if (!"text".equals(flavor.getPrimaryType()) || |
| !doesSubtypeSupportCharset(flavor)) |
| { |
| return false; |
| } |
| |
| Class rep_class = flavor.getRepresentationClass(); |
| |
| if (flavor.isRepresentationClassReader() || |
| String.class.equals(rep_class) || |
| flavor.isRepresentationClassCharBuffer() || |
| DataTransferer.charArrayClass.equals(rep_class)) |
| { |
| return true; |
| } |
| |
| if (!(flavor.isRepresentationClassInputStream() || |
| flavor.isRepresentationClassByteBuffer() || |
| DataTransferer.byteArrayClass.equals(rep_class))) { |
| return false; |
| } |
| |
| String charset = flavor.getParameter("charset"); |
| |
| return (charset != null) |
| ? DataTransferer.isEncodingSupported(charset) |
| : true; // null equals default encoding which is always supported |
| } |
| |
| /** |
| * Returns whether this flavor is a text type which does not support the |
| * 'charset' parameter. |
| */ |
| public static boolean isFlavorNoncharsetTextType(DataFlavor flavor) { |
| if (!"text".equals(flavor.getPrimaryType()) || |
| doesSubtypeSupportCharset(flavor)) |
| { |
| return false; |
| } |
| |
| return (flavor.isRepresentationClassInputStream() || |
| flavor.isRepresentationClassByteBuffer() || |
| DataTransferer.byteArrayClass. |
| equals(flavor.getRepresentationClass())); |
| } |
| |
| /** |
| * Determines whether this JRE can both encode and decode text in the |
| * specified encoding. |
| */ |
| public static boolean isEncodingSupported(String encoding) { |
| if (encoding == null) { |
| return false; |
| } |
| try { |
| return Charset.isSupported(encoding); |
| } catch (IllegalCharsetNameException icne) { |
| return false; |
| } |
| } |
| |
| /** |
| * Returns {@code true} if the given type is a java.rmi.Remote. |
| */ |
| public static boolean isRemote(Class<?> type) { |
| return RMI.isRemote(type); |
| } |
| |
| /** |
| * Returns an Iterator which traverses a SortedSet of Strings which are |
| * a total order of the standard character sets supported by the JRE. The |
| * ordering follows the same principles as DataFlavor.selectBestTextFlavor. |
| * So as to avoid loading all available character converters, optional, |
| * non-standard, character sets are not included. |
| */ |
| public static Iterator standardEncodings() { |
| return StandardEncodingsHolder.standardEncodings.iterator(); |
| } |
| |
| /** |
| * Converts a FlavorMap to a FlavorTable. |
| */ |
| public static FlavorTable adaptFlavorMap(final FlavorMap map) { |
| if (map instanceof FlavorTable) { |
| return (FlavorTable)map; |
| } |
| |
| return new FlavorTable() { |
| public Map getNativesForFlavors(DataFlavor[] flavors) { |
| return map.getNativesForFlavors(flavors); |
| } |
| public Map getFlavorsForNatives(String[] natives) { |
| return map.getFlavorsForNatives(natives); |
| } |
| public List getNativesForFlavor(DataFlavor flav) { |
| Map natives = |
| getNativesForFlavors(new DataFlavor[] { flav } ); |
| String nat = (String)natives.get(flav); |
| if (nat != null) { |
| List list = new ArrayList(1); |
| list.add(nat); |
| return list; |
| } else { |
| return Collections.EMPTY_LIST; |
| } |
| } |
| public List getFlavorsForNative(String nat) { |
| Map flavors = |
| getFlavorsForNatives(new String[] { nat } ); |
| DataFlavor flavor = (DataFlavor)flavors.get(nat); |
| if (flavor != null) { |
| List list = new ArrayList(1); |
| list.add(flavor); |
| return list; |
| } else { |
| return Collections.EMPTY_LIST; |
| } |
| } |
| }; |
| } |
| |
| /** |
| * Returns the default Unicode encoding for the platform. The encoding |
| * need not be canonical. This method is only used by the archaic function |
| * DataFlavor.getTextPlainUnicodeFlavor(). |
| */ |
| public abstract String getDefaultUnicodeEncoding(); |
| |
| /** |
| * This method is called for text flavor mappings established while parsing |
| * the flavormap.properties file. It stores the "eoln" and "terminators" |
| * parameters which are not officially part of the MIME type. They are |
| * MIME parameters specific to the flavormap.properties file format. |
| */ |
| public void registerTextFlavorProperties(String nat, String charset, |
| String eoln, String terminators) { |
| Long format = getFormatForNativeAsLong(nat); |
| |
| textNatives.add(format); |
| nativeCharsets.put(format, (charset != null && charset.length() != 0) |
| ? charset : getDefaultTextCharset()); |
| if (eoln != null && eoln.length() != 0 && !eoln.equals("\n")) { |
| nativeEOLNs.put(format, eoln); |
| } |
| if (terminators != null && terminators.length() != 0) { |
| Integer iTerminators = Integer.valueOf(terminators); |
| if (iTerminators.intValue() > 0) { |
| nativeTerminators.put(format, iTerminators); |
| } |
| } |
| } |
| |
| /** |
| * Determines whether the native corresponding to the specified long format |
| * was listed in the flavormap.properties file. |
| */ |
| protected boolean isTextFormat(long format) { |
| return textNatives.contains(Long.valueOf(format)); |
| } |
| |
| protected String getCharsetForTextFormat(Long lFormat) { |
| return (String)nativeCharsets.get(lFormat); |
| } |
| |
| /** |
| * Specifies whether text imported from the native system in the specified |
| * format is locale-dependent. If so, when decoding such text, |
| * 'nativeCharsets' should be ignored, and instead, the Transferable should |
| * be queried for its javaTextEncodingFlavor data for the correct encoding. |
| */ |
| public abstract boolean isLocaleDependentTextFormat(long format); |
| |
| /** |
| * Determines whether the DataFlavor corresponding to the specified long |
| * format is DataFlavor.javaFileListFlavor. |
| */ |
| public abstract boolean isFileFormat(long format); |
| |
| /** |
| * Determines whether the DataFlavor corresponding to the specified long |
| * format is DataFlavor.imageFlavor. |
| */ |
| public abstract boolean isImageFormat(long format); |
| |
| /** |
| * Determines whether the format is a URI list we can convert to |
| * a DataFlavor.javaFileListFlavor. |
| */ |
| protected boolean isURIListFormat(long format) { |
| return false; |
| } |
| |
| /** |
| * Returns a Map whose keys are all of the possible formats into which the |
| * Transferable's transfer data flavors can be translated. The value of |
| * each key is the DataFlavor in which the Transferable's data should be |
| * requested when converting to the format. |
| * <p> |
| * The map keys are sorted according to the native formats preference |
| * order. |
| */ |
| public SortedMap getFormatsForTransferable(Transferable contents, |
| FlavorTable map) { |
| DataFlavor[] flavors = contents.getTransferDataFlavors(); |
| if (flavors == null) { |
| return new TreeMap(); |
| } |
| return getFormatsForFlavors(flavors, map); |
| } |
| |
| /** |
| * Returns a Map whose keys are all of the possible formats into which data |
| * in the specified DataFlavor can be translated. The value of each key |
| * is the DataFlavor in which a Transferable's data should be requested |
| * when converting to the format. |
| * <p> |
| * The map keys are sorted according to the native formats preference |
| * order. |
| */ |
| public SortedMap getFormatsForFlavor(DataFlavor flavor, FlavorTable map) { |
| return getFormatsForFlavors(new DataFlavor[] { flavor }, |
| map); |
| } |
| |
| /** |
| * Returns a Map whose keys are all of the possible formats into which data |
| * in the specified DataFlavors can be translated. The value of each key |
| * is the DataFlavor in which the Transferable's data should be requested |
| * when converting to the format. |
| * <p> |
| * The map keys are sorted according to the native formats preference |
| * order. |
| * |
| * @param flavors the data flavors |
| * @param map the FlavorTable which contains mappings between |
| * DataFlavors and data formats |
| * @throws NullPointerException if flavors or map is <code>null</code> |
| */ |
| public SortedMap getFormatsForFlavors(DataFlavor[] flavors, FlavorTable map) { |
| Map formatMap = new HashMap(flavors.length); |
| Map textPlainMap = new HashMap(flavors.length); |
| // Maps formats to indices that will be used to sort the formats |
| // according to the preference order. |
| // Larger index value corresponds to the more preferable format. |
| Map indexMap = new HashMap(flavors.length); |
| Map textPlainIndexMap = new HashMap(flavors.length); |
| |
| int currentIndex = 0; |
| |
| // Iterate backwards so that preferred DataFlavors are used over |
| // other DataFlavors. (See javadoc for |
| // Transferable.getTransferDataFlavors.) |
| for (int i = flavors.length - 1; i >= 0; i--) { |
| DataFlavor flavor = flavors[i]; |
| if (flavor == null) continue; |
| |
| // Don't explicitly test for String, since it is just a special |
| // case of Serializable |
| if (flavor.isFlavorTextType() || |
| flavor.isFlavorJavaFileListType() || |
| DataFlavor.imageFlavor.equals(flavor) || |
| flavor.isRepresentationClassSerializable() || |
| flavor.isRepresentationClassInputStream() || |
| flavor.isRepresentationClassRemote()) |
| { |
| List natives = map.getNativesForFlavor(flavor); |
| |
| currentIndex += natives.size(); |
| |
| for (Iterator iter = natives.iterator(); iter.hasNext(); ) { |
| Long lFormat = |
| getFormatForNativeAsLong((String)iter.next()); |
| Integer index = Integer.valueOf(currentIndex--); |
| |
| formatMap.put(lFormat, flavor); |
| indexMap.put(lFormat, index); |
| |
| // SystemFlavorMap.getNativesForFlavor will return |
| // text/plain natives for all text/*. While this is good |
| // for a single text/* flavor, we would prefer that |
| // text/plain native data come from a text/plain flavor. |
| if (("text".equals(flavor.getPrimaryType()) && |
| "plain".equals(flavor.getSubType())) || |
| flavor.equals(DataFlavor.stringFlavor)) |
| { |
| textPlainMap.put(lFormat, flavor); |
| textPlainIndexMap.put(lFormat, index); |
| } |
| } |
| |
| currentIndex += natives.size(); |
| } |
| } |
| |
| formatMap.putAll(textPlainMap); |
| indexMap.putAll(textPlainIndexMap); |
| |
| // Sort the map keys according to the formats preference order. |
| Comparator comparator = |
| new IndexOrderComparator(indexMap, IndexedComparator.SELECT_WORST); |
| SortedMap sortedMap = new TreeMap(comparator); |
| sortedMap.putAll(formatMap); |
| |
| return sortedMap; |
| } |
| |
| /** |
| * Reduces the Map output for the root function to an array of the |
| * Map's keys. |
| */ |
| public long[] getFormatsForTransferableAsArray(Transferable contents, |
| FlavorTable map) { |
| return keysToLongArray(getFormatsForTransferable(contents, map)); |
| } |
| public long[] getFormatsForFlavorAsArray(DataFlavor flavor, |
| FlavorTable map) { |
| return keysToLongArray(getFormatsForFlavor(flavor, map)); |
| } |
| public long[] getFormatsForFlavorsAsArray(DataFlavor[] flavors, |
| FlavorTable map) { |
| return keysToLongArray(getFormatsForFlavors(flavors, map)); |
| } |
| |
| /** |
| * Returns a Map whose keys are all of the possible DataFlavors into which |
| * data in the specified format can be translated. The value of each key |
| * is the format in which the Clipboard or dropped data should be requested |
| * when converting to the DataFlavor. |
| */ |
| public Map getFlavorsForFormat(long format, FlavorTable map) { |
| return getFlavorsForFormats(new long[] { format }, map); |
| } |
| |
| /** |
| * Returns a Map whose keys are all of the possible DataFlavors into which |
| * data in the specified formats can be translated. The value of each key |
| * is the format in which the Clipboard or dropped data should be requested |
| * when converting to the DataFlavor. |
| */ |
| public Map getFlavorsForFormats(long[] formats, FlavorTable map) { |
| Map flavorMap = new HashMap(formats.length); |
| Set mappingSet = new HashSet(formats.length); |
| Set flavorSet = new HashSet(formats.length); |
| |
| // First step: build flavorSet, mappingSet and initial flavorMap |
| // flavorSet - the set of all the DataFlavors into which |
| // data in the specified formats can be translated; |
| // mappingSet - the set of all the mappings from the specified formats |
| // into any DataFlavor; |
| // flavorMap - after this step, this map maps each of the DataFlavors |
| // from flavorSet to any of the specified formats. |
| for (int i = 0; i < formats.length; i++) { |
| long format = formats[i]; |
| String nat = getNativeForFormat(format); |
| List flavors = map.getFlavorsForNative(nat); |
| |
| for (Iterator iter = flavors.iterator(); iter.hasNext(); ) { |
| DataFlavor flavor = (DataFlavor)iter.next(); |
| |
| // Don't explicitly test for String, since it is just a special |
| // case of Serializable |
| if (flavor.isFlavorTextType() || |
| flavor.isFlavorJavaFileListType() || |
| DataFlavor.imageFlavor.equals(flavor) || |
| flavor.isRepresentationClassSerializable() || |
| flavor.isRepresentationClassInputStream() || |
| flavor.isRepresentationClassRemote()) |
| { |
| Long lFormat = Long.valueOf(format); |
| Object mapping = |
| DataTransferer.createMapping(lFormat, flavor); |
| flavorMap.put(flavor, lFormat); |
| mappingSet.add(mapping); |
| flavorSet.add(flavor); |
| } |
| } |
| } |
| |
| // Second step: for each DataFlavor try to figure out which of the |
| // specified formats is the best to translate to this flavor. |
| // Then map each flavor to the best format. |
| // For the given flavor, FlavorTable indicates which native will |
| // best reflect data in the specified flavor to the underlying native |
| // platform. We assume that this native is the best to translate |
| // to this flavor. |
| // Note: FlavorTable allows one-way mappings, so we can occasionally |
| // map a flavor to the format for which the corresponding |
| // format-to-flavor mapping doesn't exist. For this reason we have built |
| // a mappingSet of all format-to-flavor mappings for the specified formats |
| // and check if the format-to-flavor mapping exists for the |
| // (flavor,format) pair being added. |
| for (Iterator flavorIter = flavorSet.iterator(); |
| flavorIter.hasNext(); ) { |
| DataFlavor flavor = (DataFlavor)flavorIter.next(); |
| |
| List natives = map.getNativesForFlavor(flavor); |
| |
| for (Iterator nativeIter = natives.iterator(); |
| nativeIter.hasNext(); ) { |
| Long lFormat = |
| getFormatForNativeAsLong((String)nativeIter.next()); |
| Object mapping = DataTransferer.createMapping(lFormat, flavor); |
| |
| if (mappingSet.contains(mapping)) { |
| flavorMap.put(flavor, lFormat); |
| break; |
| } |
| } |
| } |
| |
| return flavorMap; |
| } |
| |
| /** |
| * Returns a Set of all DataFlavors for which |
| * 1) a mapping from at least one of the specified formats exists in the |
| * specified map and |
| * 2) the data translation for this mapping can be performed by the data |
| * transfer subsystem. |
| * |
| * @param formats the data formats |
| * @param map the FlavorTable which contains mappings between |
| * DataFlavors and data formats |
| * @throws NullPointerException if formats or map is <code>null</code> |
| */ |
| public Set getFlavorsForFormatsAsSet(long[] formats, FlavorTable map) { |
| Set flavorSet = new HashSet(formats.length); |
| |
| for (int i = 0; i < formats.length; i++) { |
| String nat = getNativeForFormat(formats[i]); |
| List flavors = map.getFlavorsForNative(nat); |
| |
| for (Iterator iter = flavors.iterator(); iter.hasNext(); ) { |
| DataFlavor flavor = (DataFlavor)iter.next(); |
| |
| // Don't explicitly test for String, since it is just a special |
| // case of Serializable |
| if (flavor.isFlavorTextType() || |
| flavor.isFlavorJavaFileListType() || |
| DataFlavor.imageFlavor.equals(flavor) || |
| flavor.isRepresentationClassSerializable() || |
| flavor.isRepresentationClassInputStream() || |
| flavor.isRepresentationClassRemote()) |
| { |
| flavorSet.add(flavor); |
| } |
| } |
| } |
| |
| return flavorSet; |
| } |
| |
| /** |
| * Returns an array of all DataFlavors for which |
| * 1) a mapping from the specified format exists in the specified map and |
| * 2) the data translation for this mapping can be performed by the data |
| * transfer subsystem. |
| * The array will be sorted according to a |
| * <code>DataFlavorComparator</code> created with the specified |
| * map as an argument. |
| * |
| * @param format the data format |
| * @param map the FlavorTable which contains mappings between |
| * DataFlavors and data formats |
| * @throws NullPointerException if map is <code>null</code> |
| */ |
| public DataFlavor[] getFlavorsForFormatAsArray(long format, |
| FlavorTable map) { |
| return getFlavorsForFormatsAsArray(new long[] { format }, map); |
| } |
| |
| /** |
| * Returns an array of all DataFlavors for which |
| * 1) a mapping from at least one of the specified formats exists in the |
| * specified map and |
| * 2) the data translation for this mapping can be performed by the data |
| * transfer subsystem. |
| * The array will be sorted according to a |
| * <code>DataFlavorComparator</code> created with the specified |
| * map as an argument. |
| * |
| * @param formats the data formats |
| * @param map the FlavorTable which contains mappings between |
| * DataFlavors and data formats |
| * @throws NullPointerException if formats or map is <code>null</code> |
| */ |
| public DataFlavor[] getFlavorsForFormatsAsArray(long[] formats, |
| FlavorTable map) { |
| // getFlavorsForFormatsAsSet() is less expensive than |
| // getFlavorsForFormats(). |
| return setToSortedDataFlavorArray(getFlavorsForFormatsAsSet(formats, map)); |
| } |
| |
| /** |
| * Returns an object that represents a mapping between the specified |
| * key and value. <tt>null</tt> values and the <tt>null</tt> keys are |
| * permitted. The internal representation of the mapping object is |
| * irrelevant. The only requrement is that the two mapping objects are equal |
| * if and only if their keys are equal and their values are equal. |
| * More formally, the two mapping objects are equal if and only if |
| * <tt>(value1 == null ? value2 == null : value1.equals(value2)) |
| * && (key1 == null ? key2 == null : key1.equals(key2))</tt>. |
| */ |
| private static Object createMapping(Object key, Object value) { |
| // NOTE: Should be updated to use AbstractMap.SimpleEntry as |
| // soon as it is made public. |
| return Arrays.asList(new Object[] { key, value }); |
| } |
| |
| /** |
| * Looks-up or registers the String native with the native data transfer |
| * system and returns a long format corresponding to that native. |
| */ |
| protected abstract Long getFormatForNativeAsLong(String str); |
| |
| /** |
| * Looks-up the String native corresponding to the specified long format in |
| * the native data transfer system. |
| */ |
| protected abstract String getNativeForFormat(long format); |
| |
| /* Contains common code for finding the best charset for |
| * clipboard string encoding/decoding, basing on clipboard |
| * format and localeTransferable(on decoding, if available) |
| */ |
| private String getBestCharsetForTextFormat(Long lFormat, |
| Transferable localeTransferable) throws IOException |
| { |
| String charset = null; |
| if (localeTransferable != null && |
| isLocaleDependentTextFormat(lFormat) && |
| localeTransferable.isDataFlavorSupported(javaTextEncodingFlavor)) |
| { |
| try { |
| charset = new String( |
| (byte[])localeTransferable.getTransferData(javaTextEncodingFlavor), |
| "UTF-8" |
| ); |
| } catch (UnsupportedFlavorException cannotHappen) { |
| } |
| } else { |
| charset = getCharsetForTextFormat(lFormat); |
| } |
| if (charset == null) { |
| // Only happens when we have a custom text type. |
| charset = getDefaultTextCharset(); |
| } |
| return charset; |
| } |
| |
| /** |
| * Translation function for converting string into |
| * a byte array. Search-and-replace EOLN. Encode into the |
| * target format. Append terminating NUL bytes. |
| * |
| * Java to Native string conversion |
| */ |
| private byte[] translateTransferableString(String str, |
| long format) throws IOException |
| { |
| Long lFormat = Long.valueOf(format); |
| String charset = getBestCharsetForTextFormat(lFormat, null); |
| // Search and replace EOLN. Note that if EOLN is "\n", then we |
| // never added an entry to nativeEOLNs anyway, so we'll skip this |
| // code altogether. |
| // windows: "abc\nde"->"abc\r\nde" |
| String eoln = (String)nativeEOLNs.get(lFormat); |
| if (eoln != null) { |
| int length = str.length(); |
| StringBuffer buffer = |
| new StringBuffer(length * 2); // 2 is a heuristic |
| for (int i = 0; i < length; i++) { |
| // Fix for 4914613 - skip native EOLN |
| if (str.startsWith(eoln, i)) { |
| buffer.append(eoln); |
| i += eoln.length() - 1; |
| continue; |
| } |
| char c = str.charAt(i); |
| if (c == '\n') { |
| buffer.append(eoln); |
| } else { |
| buffer.append(c); |
| } |
| } |
| str = buffer.toString(); |
| } |
| |
| // Encode text in target format. |
| byte[] bytes = str.getBytes(charset); |
| |
| // Append terminating NUL bytes. Note that if terminators is 0, |
| // the we never added an entry to nativeTerminators anyway, so |
| // we'll skip code altogether. |
| // "abcde" -> "abcde\0" |
| Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| if (terminators != null) { |
| int numTerminators = terminators.intValue(); |
| byte[] terminatedBytes = |
| new byte[bytes.length + numTerminators]; |
| System.arraycopy(bytes, 0, terminatedBytes, 0, bytes.length); |
| for (int i = bytes.length; i < terminatedBytes.length; i++) { |
| terminatedBytes[i] = 0x0; |
| } |
| bytes = terminatedBytes; |
| } |
| return bytes; |
| } |
| |
| /** |
| * Translating either a byte array or an InputStream into an String. |
| * Strip terminators and search-and-replace EOLN. |
| * |
| * Native to Java string conversion |
| */ |
| private String translateBytesOrStreamToString(InputStream str, byte[] bytes, |
| long format, |
| Transferable localeTransferable) |
| throws IOException |
| { |
| // A String holds all of its data in memory at one time, so |
| // we can't avoid reading the entire InputStream at this point. |
| if (bytes == null) { |
| bytes = inputStreamToByteArray(str); |
| } |
| str.close(); |
| |
| Long lFormat = Long.valueOf(format); |
| String charset = getBestCharsetForTextFormat(lFormat, localeTransferable); |
| |
| // Locate terminating NUL bytes. Note that if terminators is 0, |
| // the we never added an entry to nativeTerminators anyway, so |
| // we'll skip code altogether. |
| |
| // In other words: we are doing char alignment here basing on suggestion |
| // that count of zero-'terminators' is a number of bytes in one symbol |
| // for selected charset (clipboard format). It is not complitly true for |
| // multibyte coding like UTF-8, but helps understand the procedure. |
| // "abcde\0" -> "abcde" |
| |
| String eoln = (String)nativeEOLNs.get(lFormat); |
| Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| int count; |
| if (terminators != null) { |
| int numTerminators = terminators.intValue(); |
| search: |
| for (count = 0; count < (bytes.length - numTerminators + 1); count += numTerminators) { |
| for (int i = count; i < count + numTerminators; i++) { |
| if (bytes[i] != 0x0) { |
| continue search; |
| } |
| } |
| // found terminators |
| break search; |
| } |
| } else { |
| count = bytes.length; |
| } |
| |
| // Decode text to chars. Don't include any terminators. |
| String converted = new String(bytes, 0, count, charset); |
| |
| // Search and replace EOLN. Note that if EOLN is "\n", then we |
| // never added an entry to nativeEOLNs anyway, so we'll skip this |
| // code altogether. |
| // Count of NUL-terminators and EOLN coding are platform-specific and |
| // loaded from flavormap.properties file |
| // windows: "abc\r\nde" -> "abc\nde" |
| |
| if (eoln != null) { |
| |
| /* Fix for 4463560: replace EOLNs symbol-by-symbol instead |
| * of using buf.replace() |
| */ |
| |
| char[] buf = converted.toCharArray(); |
| char[] eoln_arr = eoln.toCharArray(); |
| converted = null; |
| int j = 0; |
| boolean match; |
| |
| for (int i = 0; i < buf.length; ) { |
| // Catch last few bytes |
| if (i + eoln_arr.length > buf.length) { |
| buf[j++] = buf[i++]; |
| continue; |
| } |
| |
| match = true; |
| for (int k = 0, l = i; k < eoln_arr.length; k++, l++) { |
| if (eoln_arr[k] != buf[l]) { |
| match = false; |
| break; |
| } |
| } |
| if (match) { |
| buf[j++] = '\n'; |
| i += eoln_arr.length; |
| } else { |
| buf[j++] = buf[i++]; |
| } |
| } |
| converted = new String(buf, 0, j); |
| } |
| |
| return converted; |
| } |
| |
| |
| /** |
| * Primary translation function for translating a Transferable into |
| * a byte array, given a source DataFlavor and target format. |
| */ |
| public byte[] translateTransferable(Transferable contents, |
| DataFlavor flavor, |
| long format) throws IOException |
| { |
| // Obtain the transfer data in the source DataFlavor. |
| // |
| // Note that we special case DataFlavor.plainTextFlavor because |
| // StringSelection supports this flavor incorrectly -- instead of |
| // returning an InputStream as the DataFlavor representation class |
| // states, it returns a Reader. Instead of using this broken |
| // functionality, we request the data in stringFlavor (the other |
| // DataFlavor which StringSelection supports) and use the String |
| // translator. |
| Object obj; |
| boolean stringSelectionHack; |
| try { |
| obj = contents.getTransferData(flavor); |
| if (obj == null) { |
| return null; |
| } |
| if (flavor.equals(DataFlavor.plainTextFlavor) && |
| !(obj instanceof InputStream)) |
| { |
| obj = contents.getTransferData(DataFlavor.stringFlavor); |
| if (obj == null) { |
| return null; |
| } |
| stringSelectionHack = true; |
| } else { |
| stringSelectionHack = false; |
| } |
| } catch (UnsupportedFlavorException e) { |
| throw new IOException(e.getMessage()); |
| } |
| |
| // Source data is a String. Search-and-replace EOLN. Encode into the |
| // target format. Append terminating NUL bytes. |
| if (stringSelectionHack || |
| (String.class.equals(flavor.getRepresentationClass()) && |
| isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| |
| String str = removeSuspectedData(flavor, contents, (String)obj); |
| |
| return translateTransferableString( |
| str, |
| format); |
| |
| // Source data is a Reader. Convert to a String and recur. In the |
| // future, we may want to rewrite this so that we encode on demand. |
| } else if (flavor.isRepresentationClassReader()) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as Reader"); |
| } |
| |
| Reader r = (Reader)obj; |
| StringBuffer buf = new StringBuffer(); |
| int c; |
| while ((c = r.read()) != -1) { |
| buf.append((char)c); |
| } |
| r.close(); |
| |
| return translateTransferableString( |
| buf.toString(), |
| format); |
| |
| // Source data is a CharBuffer. Convert to a String and recur. |
| } else if (flavor.isRepresentationClassCharBuffer()) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as CharBuffer"); |
| } |
| |
| CharBuffer buffer = (CharBuffer)obj; |
| int size = buffer.remaining(); |
| char[] chars = new char[size]; |
| buffer.get(chars, 0, size); |
| |
| return translateTransferableString( |
| new String(chars), |
| format); |
| |
| // Source data is a char array. Convert to a String and recur. |
| } else if (charArrayClass.equals(flavor.getRepresentationClass())) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as char array"); |
| } |
| |
| return translateTransferableString( |
| new String((char[])obj), |
| format); |
| |
| // Source data is a ByteBuffer. For arbitrary flavors, simply return |
| // the array. For text flavors, decode back to a String and recur to |
| // reencode according to the requested format. |
| } else if (flavor.isRepresentationClassByteBuffer()) { |
| ByteBuffer buffer = (ByteBuffer)obj; |
| int size = buffer.remaining(); |
| byte[] bytes = new byte[size]; |
| buffer.get(bytes, 0, size); |
| |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| return translateTransferableString( |
| new String(bytes, sourceEncoding), |
| format); |
| } else { |
| return bytes; |
| } |
| |
| // Source data is a byte array. For arbitrary flavors, simply return |
| // the array. For text flavors, decode back to a String and recur to |
| // reencode according to the requested format. |
| } else if (byteArrayClass.equals(flavor.getRepresentationClass())) { |
| byte[] bytes = (byte[])obj; |
| |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| return translateTransferableString( |
| new String(bytes, sourceEncoding), |
| format); |
| } else { |
| return bytes; |
| } |
| // Source data is Image |
| } else if (DataFlavor.imageFlavor.equals(flavor)) { |
| if (!isImageFormat(format)) { |
| throw new IOException("Data translation failed: " + |
| "not an image format"); |
| } |
| |
| Image image = (Image)obj; |
| byte[] bytes = imageToPlatformBytes(image, format); |
| |
| if (bytes == null) { |
| throw new IOException("Data translation failed: " + |
| "cannot convert java image to native format"); |
| } |
| return bytes; |
| } |
| |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| |
| // Target data is a file list. Source data must be a |
| // java.util.List which contains java.io.File or String instances. |
| if (isFileFormat(format)) { |
| if (!DataFlavor.javaFileListFlavor.equals(flavor)) { |
| throw new IOException("data translation failed"); |
| } |
| |
| final List list = (List)obj; |
| |
| final ProtectionDomain userProtectionDomain = getUserProtectionDomain(contents); |
| |
| final ArrayList<String> fileList = castToFiles(list, userProtectionDomain); |
| |
| bos = convertFileListToBytes(fileList); |
| |
| |
| // Target data is a URI list. Source data must be a |
| // java.util.List which contains java.io.File or String instances. |
| } else if (isURIListFormat(format)) { |
| if (!DataFlavor.javaFileListFlavor.equals(flavor)) { |
| throw new IOException("data translation failed"); |
| } |
| String nat = getNativeForFormat(format); |
| String targetCharset = null; |
| if (nat != null) { |
| try { |
| targetCharset = new DataFlavor(nat).getParameter("charset"); |
| } catch (ClassNotFoundException cnfe) { |
| throw new IOException(cnfe); |
| } |
| } |
| if (targetCharset == null) { |
| targetCharset = "UTF-8"; |
| } |
| final List list = (List)obj; |
| final ProtectionDomain userProtectionDomain = getUserProtectionDomain(contents); |
| final ArrayList<String> fileList = castToFiles(list, userProtectionDomain); |
| final ArrayList<String> uriList = new ArrayList<String>(fileList.size()); |
| for (String fileObject : fileList) { |
| final URI uri = new File(fileObject).toURI(); |
| // Some implementations are fussy about the number of slashes (file:///path/to/file is best) |
| try { |
| uriList.add(new URI(uri.getScheme(), "", uri.getPath(), uri.getFragment()).toString()); |
| } catch (URISyntaxException uriSyntaxException) { |
| throw new IOException(uriSyntaxException); |
| } |
| } |
| |
| byte[] eoln = "\r\n".getBytes(targetCharset); |
| for (int i = 0; i < uriList.size(); i++) { |
| byte[] bytes = uriList.get(i).getBytes(targetCharset); |
| bos.write(bytes, 0, bytes.length); |
| bos.write(eoln, 0, eoln.length); |
| } |
| |
| // Source data is an InputStream. For arbitrary flavors, just grab the |
| // bytes and dump them into a byte array. For text flavors, decode back |
| // to a String and recur to reencode according to the requested format. |
| } else if (flavor.isRepresentationClassInputStream()) { |
| InputStream is = (InputStream)obj; |
| boolean eof = false; |
| int avail = is.available(); |
| byte[] tmp = new byte[avail > 8192 ? avail : 8192]; |
| do { |
| int ret; |
| if (!(eof = (ret = is.read(tmp, 0, tmp.length)) == -1)) { |
| bos.write(tmp, 0, ret); |
| } |
| } while (!eof); |
| is.close(); |
| |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| byte[] bytes = bos.toByteArray(); |
| bos.close(); |
| String sourceEncoding = DataTransferer.getTextCharset(flavor); |
| return translateTransferableString( |
| new String(bytes, sourceEncoding), |
| format); |
| } |
| |
| // Source data is an RMI object |
| } else if (flavor.isRepresentationClassRemote()) { |
| Object mo = RMI.newMarshalledObject(obj); |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| oos.writeObject(mo); |
| oos.close(); |
| |
| // Source data is Serializable |
| } else if (flavor.isRepresentationClassSerializable()) { |
| ObjectOutputStream oos = new ObjectOutputStream(bos); |
| oos.writeObject(obj); |
| oos.close(); |
| |
| } else { |
| throw new IOException("data translation failed"); |
| } |
| |
| byte[] ret = bos.toByteArray(); |
| bos.close(); |
| return ret; |
| } |
| |
| protected abstract ByteArrayOutputStream convertFileListToBytes(ArrayList<String> fileList) throws IOException; |
| |
| private String removeSuspectedData(DataFlavor flavor, final Transferable contents, final String str) |
| throws IOException |
| { |
| if (null == System.getSecurityManager() |
| || !flavor.isMimeTypeEqual("text/uri-list")) |
| { |
| return str; |
| } |
| |
| |
| String ret_val = ""; |
| final ProtectionDomain userProtectionDomain = getUserProtectionDomain(contents); |
| |
| try { |
| ret_val = (String) AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() { |
| |
| StringBuffer allowedFiles = new StringBuffer(str.length()); |
| String [] uriArray = str.split("(\\s)+"); |
| |
| for (String fileName : uriArray) |
| { |
| File file = new File(fileName); |
| if (file.exists() && |
| !(isFileInWebstartedCache(file) || |
| isForbiddenToRead(file, userProtectionDomain))) |
| { |
| |
| if (0 != allowedFiles.length()) |
| { |
| allowedFiles.append("\\r\\n"); |
| } |
| |
| allowedFiles.append(fileName); |
| } |
| } |
| |
| return allowedFiles.toString(); |
| } |
| }); |
| } catch (PrivilegedActionException pae) { |
| throw new IOException(pae.getMessage(), pae); |
| } |
| |
| return ret_val; |
| } |
| |
| private static ProtectionDomain getUserProtectionDomain(Transferable contents) { |
| return contents.getClass().getProtectionDomain(); |
| } |
| |
| private boolean isForbiddenToRead (File file, ProtectionDomain protectionDomain) |
| { |
| if (null == protectionDomain) { |
| return false; |
| } |
| try { |
| FilePermission filePermission = |
| new FilePermission(file.getCanonicalPath(), "read, delete"); |
| if (protectionDomain.implies(filePermission)) { |
| return false; |
| } |
| } catch (IOException e) {} |
| |
| return true; |
| } |
| |
| private ArrayList<String> castToFiles(final List files, |
| final ProtectionDomain userProtectionDomain) throws IOException |
| { |
| final ArrayList<String> fileList = new ArrayList<String>(); |
| try { |
| AccessController.doPrivileged(new PrivilegedExceptionAction() { |
| public Object run() throws IOException { |
| for (Object fileObject : files) |
| { |
| File file = castToFile(fileObject); |
| if (file != null && |
| (null == System.getSecurityManager() || |
| !(isFileInWebstartedCache(file) || |
| isForbiddenToRead(file, userProtectionDomain)))) |
| { |
| fileList.add(file.getCanonicalPath()); |
| } |
| } |
| return null; |
| } |
| }); |
| } catch (PrivilegedActionException pae) { |
| throw new IOException(pae.getMessage()); |
| } |
| return fileList; |
| } |
| |
| // It is important do not use user's successors |
| // of File class. |
| private File castToFile(Object fileObject) throws IOException { |
| String filePath = null; |
| if (fileObject instanceof File) { |
| filePath = ((File)fileObject).getCanonicalPath(); |
| } else if (fileObject instanceof String) { |
| filePath = (String) fileObject; |
| } else { |
| return null; |
| } |
| return new File(filePath); |
| } |
| |
| private final static String[] DEPLOYMENT_CACHE_PROPERTIES = { |
| "deployment.system.cachedir", |
| "deployment.user.cachedir", |
| "deployment.javaws.cachedir", |
| "deployment.javapi.cachedir" |
| }; |
| |
| private final static ArrayList <File> deploymentCacheDirectoryList = |
| new ArrayList<File>(); |
| |
| private static boolean isFileInWebstartedCache(File f) { |
| |
| if (deploymentCacheDirectoryList.isEmpty()) { |
| for (String cacheDirectoryProperty : DEPLOYMENT_CACHE_PROPERTIES) { |
| String cacheDirectoryPath = System.getProperty(cacheDirectoryProperty); |
| if (cacheDirectoryPath != null) { |
| try { |
| File cacheDirectory = (new File(cacheDirectoryPath)).getCanonicalFile(); |
| if (cacheDirectory != null) { |
| deploymentCacheDirectoryList.add(cacheDirectory); |
| } |
| } catch (IOException ioe) {} |
| } |
| } |
| } |
| |
| for (File deploymentCacheDirectory : deploymentCacheDirectoryList) { |
| for (File dir = f; dir != null; dir = dir.getParentFile()) { |
| if (dir.equals(deploymentCacheDirectory)) { |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| |
| public Object translateBytes(byte[] bytes, DataFlavor flavor, |
| long format, Transferable localeTransferable) |
| throws IOException |
| { |
| return translateBytesOrStream(null, bytes, flavor, format, |
| localeTransferable); |
| } |
| |
| public Object translateStream(InputStream str, DataFlavor flavor, |
| long format, Transferable localeTransferable) |
| throws IOException |
| { |
| return translateBytesOrStream(str, null, flavor, format, |
| localeTransferable); |
| } |
| |
| |
| /** |
| * Primary translation function for translating either a byte array or |
| * an InputStream into an Object, given a source format and a target |
| * DataFlavor. |
| * |
| * One of str/bytes is non-null; the other is null. |
| * The conversion from byte[] to InputStream is cheap, so do that |
| * immediately if necessary. The opposite conversion is expensive, |
| * so avoid it if possible. |
| */ |
| protected Object translateBytesOrStream(InputStream str, byte[] bytes, |
| DataFlavor flavor, long format, |
| Transferable localeTransferable) |
| throws IOException |
| { |
| |
| if (str == null) { |
| str = new ByteArrayInputStream(bytes); |
| } |
| |
| // Source data is a file list. Use the dragQueryFile native function to |
| // do most of the decoding. Then wrap File objects around the String |
| // filenames and return a List. |
| if (isFileFormat(format)) { |
| if (!DataFlavor.javaFileListFlavor.equals(flavor)) { |
| throw new IOException("data translation failed"); |
| } |
| if (bytes == null) { |
| bytes = inputStreamToByteArray(str); |
| } |
| String[] filenames = dragQueryFile(bytes); |
| if (filenames == null) { |
| str.close(); |
| return null; |
| } |
| |
| // Convert the strings to File objects |
| File[] files = new File[filenames.length]; |
| for (int i = 0; i < filenames.length; i++) { |
| files[i] = new File(filenames[i]); |
| } |
| str.close(); |
| |
| // Turn the list of Files into a List and return |
| return Arrays.asList(files); |
| |
| // Source data is a URI list. Convert to DataFlavor.javaFileListFlavor |
| // where possible. |
| } else if (isURIListFormat(format) && DataFlavor.javaFileListFlavor.equals(flavor)) { |
| try { |
| URI uris[] = dragQueryURIs(str, bytes, format, localeTransferable); |
| if (uris == null) { |
| return null; |
| } |
| ArrayList files = new ArrayList(); |
| for (URI uri : uris) { |
| try { |
| files.add(new File(uri)); |
| } catch (IllegalArgumentException illegalArg) { |
| // When converting from URIs to less generic files, |
| // common practice (Wine, SWT) seems to be to |
| // silently drop the URIs that aren't local files. |
| } |
| } |
| return files; |
| } finally { |
| str.close(); |
| } |
| |
| // Target data is a String. Strip terminating NUL bytes. Decode bytes |
| // into characters. Search-and-replace EOLN. |
| } else if (String.class.equals(flavor.getRepresentationClass()) && |
| isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| |
| return translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable); |
| |
| // Special hack to maintain backwards-compatibility with the brokenness |
| // of StringSelection. Return a StringReader instead of an InputStream. |
| // Recur to obtain String and encapsulate. |
| } else if (DataFlavor.plainTextFlavor.equals(flavor)) { |
| return new StringReader(translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable)); |
| |
| // Target data is an InputStream. For arbitrary flavors, just return |
| // the raw bytes. For text flavors, decode to strip terminators and |
| // search-and-replace EOLN, then reencode according to the requested |
| // flavor. |
| } else if (flavor.isRepresentationClassInputStream()) { |
| return translateBytesOrStreamToInputStream(str, flavor, format, |
| localeTransferable); |
| |
| // Target data is a Reader. Obtain data in InputStream format, encoded |
| // as "Unicode" (utf-16be). Then use an InputStreamReader to decode |
| // back to chars on demand. |
| } else if (flavor.isRepresentationClassReader()) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as Reader"); |
| } |
| |
| InputStream is = (InputStream) |
| translateBytesOrStreamToInputStream |
| (str, DataFlavor.plainTextFlavor, format, |
| localeTransferable); |
| String unicode = |
| DataTransferer.getTextCharset(DataFlavor.plainTextFlavor); |
| Reader reader = new InputStreamReader(is, unicode); |
| |
| return constructFlavoredObject(reader, flavor, Reader.class); |
| |
| // Target data is a CharBuffer. Recur to obtain String and wrap. |
| } else if (flavor.isRepresentationClassCharBuffer()) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as CharBuffer"); |
| } |
| |
| CharBuffer buffer = CharBuffer.wrap(translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable)); |
| |
| return constructFlavoredObject(buffer, flavor, CharBuffer.class); |
| |
| // Target data is a char array. Recur to obtain String and convert to |
| // char array. |
| } else if (charArrayClass.equals(flavor.getRepresentationClass())) { |
| if (!(isFlavorCharsetTextType(flavor) && isTextFormat(format))) { |
| throw new IOException |
| ("cannot transfer non-text data as char array"); |
| } |
| |
| return translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable).toCharArray(); |
| |
| // Target data is a ByteBuffer. For arbitrary flavors, just return |
| // the raw bytes. For text flavors, convert to a String to strip |
| // terminators and search-and-replace EOLN, then reencode according to |
| // the requested flavor. |
| } else if (flavor.isRepresentationClassByteBuffer()) { |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| bytes = translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable |
| ).getBytes( |
| DataTransferer.getTextCharset(flavor) |
| ); |
| } else { |
| if (bytes == null) { |
| bytes = inputStreamToByteArray(str); |
| } |
| } |
| |
| ByteBuffer buffer = ByteBuffer.wrap(bytes); |
| return constructFlavoredObject(buffer, flavor, ByteBuffer.class); |
| |
| // Target data is a byte array. For arbitrary flavors, just return |
| // the raw bytes. For text flavors, convert to a String to strip |
| // terminators and search-and-replace EOLN, then reencode according to |
| // the requested flavor. |
| } else if (byteArrayClass.equals(flavor.getRepresentationClass())) { |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| return translateBytesOrStreamToString( |
| str, bytes, |
| format, localeTransferable |
| ).getBytes( |
| DataTransferer.getTextCharset(flavor) |
| ); |
| } else { |
| return (bytes != null) ? bytes : inputStreamToByteArray(str); |
| } |
| |
| // Target data is an RMI object |
| } else if (flavor.isRepresentationClassRemote()) { |
| try { |
| byte[] ba = inputStreamToByteArray(str); |
| ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba)); |
| Object ret = RMI.getMarshalledObject(ois.readObject()); |
| ois.close(); |
| str.close(); |
| return ret; |
| } catch (Exception e) { |
| throw new IOException(e.getMessage()); |
| } |
| |
| // Target data is Serializable |
| } else if (flavor.isRepresentationClassSerializable()) { |
| try { |
| byte[] ba = inputStreamToByteArray(str); |
| ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(ba)); |
| Object ret = ois.readObject(); |
| ois.close(); |
| str.close(); |
| return ret; |
| } catch (Exception e) { |
| throw new IOException(e.getMessage()); |
| } |
| |
| // Target data is Image |
| } else if (DataFlavor.imageFlavor.equals(flavor)) { |
| if (!isImageFormat(format)) { |
| throw new IOException("data translation failed"); |
| } |
| |
| Image image = platformImageBytesOrStreamToImage(str, bytes, format); |
| str.close(); |
| return image; |
| } |
| |
| throw new IOException("data translation failed"); |
| } |
| |
| /** |
| * For arbitrary flavors, just use the raw InputStream. For text flavors, |
| * ReencodingInputStream will decode and reencode the InputStream on demand |
| * so that we can strip terminators and search-and-replace EOLN. |
| */ |
| private Object translateBytesOrStreamToInputStream |
| (InputStream str, DataFlavor flavor, long format, |
| Transferable localeTransferable) throws IOException |
| { |
| if (isFlavorCharsetTextType(flavor) && isTextFormat(format)) { |
| str = new ReencodingInputStream |
| (str, format, DataTransferer.getTextCharset(flavor), |
| localeTransferable); |
| } |
| |
| return constructFlavoredObject(str, flavor, InputStream.class); |
| } |
| |
| /** |
| * We support representations which are exactly of the specified Class, |
| * and also arbitrary Objects which have a constructor which takes an |
| * instance of the Class as its sole parameter. |
| */ |
| private Object constructFlavoredObject(Object arg, DataFlavor flavor, |
| Class clazz) |
| throws IOException |
| { |
| final Class dfrc = flavor.getRepresentationClass(); |
| |
| if (clazz.equals(dfrc)) { |
| return arg; // simple case |
| } else { |
| Constructor[] constructors = null; |
| |
| try { |
| constructors = (Constructor[]) |
| AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| return dfrc.getConstructors(); |
| } |
| }); |
| } catch (SecurityException se) { |
| throw new IOException(se.getMessage()); |
| } |
| |
| Constructor constructor = null; |
| |
| for (int j = 0; j < constructors.length; j++) { |
| if (!Modifier.isPublic(constructors[j].getModifiers())) { |
| continue; |
| } |
| |
| Class[] ptypes = constructors[j].getParameterTypes(); |
| |
| if (ptypes != null && ptypes.length == 1 && |
| clazz.equals(ptypes[0])) { |
| constructor = constructors[j]; |
| break; |
| } |
| } |
| |
| if (constructor == null) { |
| throw new IOException("can't find <init>(L"+ clazz + |
| ";)V for class: " + dfrc.getName()); |
| } |
| |
| try { |
| return constructor.newInstance(new Object[] { arg } ); |
| } catch (Exception e) { |
| throw new IOException(e.getMessage()); |
| } |
| } |
| } |
| |
| /** |
| * Used for decoding and reencoding an InputStream on demand so that we |
| * can strip NUL terminators and perform EOLN search-and-replace. |
| */ |
| public class ReencodingInputStream extends InputStream { |
| protected BufferedReader wrapped; |
| protected final char[] in = new char[2]; |
| protected byte[] out; |
| |
| protected CharsetEncoder encoder; |
| protected CharBuffer inBuf; |
| protected ByteBuffer outBuf; |
| |
| protected char[] eoln; |
| protected int numTerminators; |
| |
| protected boolean eos; |
| protected int index, limit; |
| |
| public ReencodingInputStream(InputStream bytestream, long format, |
| String targetEncoding, |
| Transferable localeTransferable) |
| throws IOException |
| { |
| Long lFormat = Long.valueOf(format); |
| |
| String sourceEncoding = null; |
| if (isLocaleDependentTextFormat(format) && |
| localeTransferable != null && |
| localeTransferable. |
| isDataFlavorSupported(javaTextEncodingFlavor)) |
| { |
| try { |
| sourceEncoding = new String((byte[])localeTransferable. |
| getTransferData(javaTextEncodingFlavor), |
| "UTF-8"); |
| } catch (UnsupportedFlavorException cannotHappen) { |
| } |
| } else { |
| sourceEncoding = getCharsetForTextFormat(lFormat); |
| } |
| |
| if (sourceEncoding == null) { |
| // Only happens when we have a custom text type. |
| sourceEncoding = getDefaultTextCharset(); |
| } |
| wrapped = new BufferedReader |
| (new InputStreamReader(bytestream, sourceEncoding)); |
| |
| if (targetEncoding == null) { |
| // Throw NullPointerException for compatibility with the former |
| // call to sun.io.CharToByteConverter.getConverter(null) |
| // (Charset.forName(null) throws unspecified IllegalArgumentException |
| // now; see 6228568) |
| throw new NullPointerException("null target encoding"); |
| } |
| |
| try { |
| encoder = Charset.forName(targetEncoding).newEncoder(); |
| out = new byte[(int)(encoder.maxBytesPerChar() * in.length + 0.5)]; |
| inBuf = CharBuffer.wrap(in); |
| outBuf = ByteBuffer.wrap(out); |
| } catch (IllegalCharsetNameException e) { |
| throw new IOException(e.toString()); |
| } catch (UnsupportedCharsetException e) { |
| throw new IOException(e.toString()); |
| } catch (UnsupportedOperationException e) { |
| throw new IOException(e.toString()); |
| } |
| |
| String sEoln = (String)nativeEOLNs.get(lFormat); |
| if (sEoln != null) { |
| eoln = sEoln.toCharArray(); |
| } |
| |
| // A hope and a prayer that this works generically. This will |
| // definitely work on Win32. |
| Integer terminators = (Integer)nativeTerminators.get(lFormat); |
| if (terminators != null) { |
| numTerminators = terminators.intValue(); |
| } |
| } |
| |
| private int readChar() throws IOException { |
| int c = wrapped.read(); |
| |
| if (c == -1) { // -1 is EOS |
| eos = true; |
| return -1; |
| } |
| |
| // "c == 0" is not quite correct, but good enough on Windows. |
| if (numTerminators > 0 && c == 0) { |
| eos = true; |
| return -1; |
| } else if (eoln != null && matchCharArray(eoln, c)) { |
| c = '\n' & 0xFFFF; |
| } |
| |
| return c; |
| } |
| |
| public int read() throws IOException { |
| if (eos) { |
| return -1; |
| } |
| |
| if (index >= limit) { |
| // deal with supplementary characters |
| int c = readChar(); |
| if (c == -1) { |
| return -1; |
| } |
| |
| in[0] = (char) c; |
| in[1] = 0; |
| inBuf.limit(1); |
| if (Character.isHighSurrogate((char) c)) { |
| c = readChar(); |
| if (c != -1) { |
| in[1] = (char) c; |
| inBuf.limit(2); |
| } |
| } |
| |
| inBuf.rewind(); |
| outBuf.limit(out.length).rewind(); |
| encoder.encode(inBuf, outBuf, false); |
| outBuf.flip(); |
| limit = outBuf.limit(); |
| |
| index = 0; |
| |
| return read(); |
| } else { |
| return out[index++] & 0xFF; |
| } |
| } |
| |
| public int available() throws IOException { |
| return ((eos) ? 0 : (limit - index)); |
| } |
| |
| public void close() throws IOException { |
| wrapped.close(); |
| } |
| |
| /** |
| * Checks to see if the next array.length characters in wrapped |
| * match array. The first character is provided as c. Subsequent |
| * characters are read from wrapped itself. When this method returns, |
| * the wrapped index may be different from what it was when this |
| * method was called. |
| */ |
| private boolean matchCharArray(char[] array, int c) |
| throws IOException |
| { |
| wrapped.mark(array.length); // BufferedReader supports mark |
| |
| int count = 0; |
| if ((char)c == array[0]) { |
| for (count = 1; count < array.length; count++) { |
| c = wrapped.read(); |
| if (c == -1 || ((char)c) != array[count]) { |
| break; |
| } |
| } |
| } |
| |
| if (count == array.length) { |
| return true; |
| } else { |
| wrapped.reset(); |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * Decodes a byte array into a set of String filenames. |
| */ |
| protected abstract String[] dragQueryFile(byte[] bytes); |
| |
| /** |
| * Decodes URIs from either a byte array or a stream. |
| */ |
| protected URI[] dragQueryURIs(InputStream stream, |
| byte[] bytes, |
| long format, |
| Transferable localeTransferable) |
| throws IOException |
| { |
| throw new IOException( |
| new UnsupportedOperationException("not implemented on this platform")); |
| } |
| |
| /** |
| * Translates either a byte array or an input stream which contain |
| * platform-specific image data in the given format into an Image. |
| */ |
| protected abstract Image platformImageBytesOrStreamToImage(InputStream str, |
| byte[] bytes, |
| long format) |
| throws IOException; |
| |
| /** |
| * Translates either a byte array or an input stream which contain |
| * an image data in the given standard format into an Image. |
| * |
| * @param mimeType image MIME type, such as: image/png, image/jpeg, image/gif |
| */ |
| protected Image standardImageBytesOrStreamToImage(InputStream inputStream, |
| byte[] bytes, |
| String mimeType) |
| throws IOException { |
| if (inputStream == null) { |
| inputStream = new ByteArrayInputStream(bytes); |
| } |
| |
| Iterator readerIterator = ImageIO.getImageReadersByMIMEType(mimeType); |
| |
| if (!readerIterator.hasNext()) { |
| throw new IOException("No registered service provider can decode " + |
| " an image from " + mimeType); |
| } |
| |
| IOException ioe = null; |
| |
| while (readerIterator.hasNext()) { |
| ImageReader imageReader = (ImageReader)readerIterator.next(); |
| try { |
| ImageInputStream imageInputStream = |
| ImageIO.createImageInputStream(inputStream); |
| |
| try { |
| ImageReadParam param = imageReader.getDefaultReadParam(); |
| imageReader.setInput(imageInputStream, true, true); |
| BufferedImage bufferedImage = |
| imageReader.read(imageReader.getMinIndex(), param); |
| if (bufferedImage != null) { |
| return bufferedImage; |
| } |
| } finally { |
| imageInputStream.close(); |
| imageReader.dispose(); |
| } |
| } catch (IOException e) { |
| ioe = e; |
| continue; |
| } |
| } |
| |
| if (ioe == null) { |
| ioe = new IOException("Registered service providers failed to decode" |
| + " an image from " + mimeType); |
| } |
| |
| throw ioe; |
| } |
| |
| /** |
| * Translates a Java Image into a byte array which contains platform- |
| * specific image data in the given format. |
| */ |
| protected abstract byte[] imageToPlatformBytes(Image image, long format) |
| throws IOException; |
| |
| /** |
| * Translates a Java Image into a byte array which contains |
| * an image data in the given standard format. |
| * |
| * @param mimeType image MIME type, such as: image/png, image/jpeg |
| */ |
| protected byte[] imageToStandardBytes(Image image, String mimeType) |
| throws IOException { |
| IOException originalIOE = null; |
| |
| Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType); |
| |
| if (!writerIterator.hasNext()) { |
| throw new IOException("No registered service provider can encode " + |
| " an image to " + mimeType); |
| } |
| |
| if (image instanceof RenderedImage) { |
| // Try to encode the original image. |
| try { |
| return imageToStandardBytesImpl((RenderedImage)image, mimeType); |
| } catch (IOException ioe) { |
| originalIOE = ioe; |
| } |
| } |
| |
| // Retry with a BufferedImage. |
| int width = 0; |
| int height = 0; |
| if (image instanceof ToolkitImage) { |
| ImageRepresentation ir = ((ToolkitImage)image).getImageRep(); |
| ir.reconstruct(ImageObserver.ALLBITS); |
| width = ir.getWidth(); |
| height = ir.getHeight(); |
| } else { |
| width = image.getWidth(null); |
| height = image.getHeight(null); |
| } |
| |
| ColorModel model = ColorModel.getRGBdefault(); |
| WritableRaster raster = |
| model.createCompatibleWritableRaster(width, height); |
| |
| BufferedImage bufferedImage = |
| new BufferedImage(model, raster, model.isAlphaPremultiplied(), |
| null); |
| |
| Graphics g = bufferedImage.getGraphics(); |
| try { |
| g.drawImage(image, 0, 0, width, height, null); |
| } finally { |
| g.dispose(); |
| } |
| |
| try { |
| return imageToStandardBytesImpl(bufferedImage, mimeType); |
| } catch (IOException ioe) { |
| if (originalIOE != null) { |
| throw originalIOE; |
| } else { |
| throw ioe; |
| } |
| } |
| } |
| |
| protected byte[] imageToStandardBytesImpl(RenderedImage renderedImage, |
| String mimeType) |
| throws IOException { |
| |
| Iterator writerIterator = ImageIO.getImageWritersByMIMEType(mimeType); |
| |
| ImageTypeSpecifier typeSpecifier = |
| new ImageTypeSpecifier(renderedImage); |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| IOException ioe = null; |
| |
| while (writerIterator.hasNext()) { |
| ImageWriter imageWriter = (ImageWriter)writerIterator.next(); |
| ImageWriterSpi writerSpi = imageWriter.getOriginatingProvider(); |
| |
| if (!writerSpi.canEncodeImage(typeSpecifier)) { |
| continue; |
| } |
| |
| try { |
| ImageOutputStream imageOutputStream = |
| ImageIO.createImageOutputStream(baos); |
| try { |
| imageWriter.setOutput(imageOutputStream); |
| imageWriter.write(renderedImage); |
| imageOutputStream.flush(); |
| } finally { |
| imageOutputStream.close(); |
| } |
| } catch (IOException e) { |
| imageWriter.dispose(); |
| baos.reset(); |
| ioe = e; |
| continue; |
| } |
| |
| imageWriter.dispose(); |
| baos.close(); |
| return baos.toByteArray(); |
| } |
| |
| baos.close(); |
| |
| if (ioe == null) { |
| ioe = new IOException("Registered service providers failed to encode " |
| + renderedImage + " to " + mimeType); |
| } |
| |
| throw ioe; |
| } |
| |
| /** |
| * Concatenates the data represented by two objects. Objects can be either |
| * byte arrays or instances of <code>InputStream</code>. If both arguments |
| * are byte arrays byte array will be returned. Otherwise an |
| * <code>InputStream</code> will be returned. |
| * <p> |
| * Currently is only called from native code to prepend palette data to |
| * platform-specific image data during image transfer on Win32. |
| * |
| * @param obj1 the first object to be concatenated. |
| * @param obj2 the second object to be concatenated. |
| * @return a byte array or an <code>InputStream</code> which represents |
| * a logical concatenation of the two arguments. |
| * @throws NullPointerException is either of the arguments is |
| * <code>null</code> |
| * @throws ClassCastException is either of the arguments is |
| * neither byte array nor an instance of <code>InputStream</code>. |
| */ |
| private Object concatData(Object obj1, Object obj2) { |
| InputStream str1 = null; |
| InputStream str2 = null; |
| |
| if (obj1 instanceof byte[]) { |
| byte[] arr1 = (byte[])obj1; |
| if (obj2 instanceof byte[]) { |
| byte[] arr2 = (byte[])obj2; |
| byte[] ret = new byte[arr1.length + arr2.length]; |
| System.arraycopy(arr1, 0, ret, 0, arr1.length); |
| System.arraycopy(arr2, 0, ret, arr1.length, arr2.length); |
| return ret; |
| } else { |
| str1 = new ByteArrayInputStream(arr1); |
| str2 = (InputStream)obj2; |
| } |
| } else { |
| str1 = (InputStream)obj1; |
| if (obj2 instanceof byte[]) { |
| str2 = new ByteArrayInputStream((byte[])obj2); |
| } else { |
| str2 = (InputStream)obj2; |
| } |
| } |
| |
| return new SequenceInputStream(str1, str2); |
| } |
| |
| public byte[] convertData(final Object source, |
| final Transferable contents, |
| final long format, |
| final Map formatMap, |
| final boolean isToolkitThread) |
| throws IOException |
| { |
| byte[] ret = null; |
| |
| /* |
| * If the current thread is the Toolkit thread we should post a |
| * Runnable to the event dispatch thread associated with source Object, |
| * since translateTransferable() calls Transferable.getTransferData() |
| * that may contain client code. |
| */ |
| if (isToolkitThread) try { |
| final Stack stack = new Stack(); |
| final Runnable dataConverter = new Runnable() { |
| // Guard against multiple executions. |
| private boolean done = false; |
| public void run() { |
| if (done) { |
| return; |
| } |
| byte[] data = null; |
| try { |
| DataFlavor flavor = (DataFlavor)formatMap.get(Long.valueOf(format)); |
| if (flavor != null) { |
| data = translateTransferable(contents, flavor, format); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| data = null; |
| } |
| try { |
| getToolkitThreadBlockedHandler().lock(); |
| stack.push(data); |
| getToolkitThreadBlockedHandler().exit(); |
| } finally { |
| getToolkitThreadBlockedHandler().unlock(); |
| done = true; |
| } |
| } |
| }; |
| |
| final AppContext appContext = SunToolkit.targetToAppContext(source); |
| |
| getToolkitThreadBlockedHandler().lock(); |
| |
| if (appContext != null) { |
| appContext.put(DATA_CONVERTER_KEY, dataConverter); |
| } |
| |
| SunToolkit.executeOnEventHandlerThread(source, dataConverter); |
| |
| while (stack.empty()) { |
| getToolkitThreadBlockedHandler().enter(); |
| } |
| |
| if (appContext != null) { |
| appContext.remove(DATA_CONVERTER_KEY); |
| } |
| |
| ret = (byte[])stack.pop(); |
| } finally { |
| getToolkitThreadBlockedHandler().unlock(); |
| } else { |
| DataFlavor flavor = (DataFlavor) |
| formatMap.get(Long.valueOf(format)); |
| if (flavor != null) { |
| ret = translateTransferable(contents, flavor, format); |
| } |
| } |
| |
| return ret; |
| } |
| |
| public void processDataConversionRequests() { |
| if (EventQueue.isDispatchThread()) { |
| AppContext appContext = AppContext.getAppContext(); |
| getToolkitThreadBlockedHandler().lock(); |
| try { |
| Runnable dataConverter = |
| (Runnable)appContext.get(DATA_CONVERTER_KEY); |
| if (dataConverter != null) { |
| dataConverter.run(); |
| appContext.remove(DATA_CONVERTER_KEY); |
| } |
| } finally { |
| getToolkitThreadBlockedHandler().unlock(); |
| } |
| } |
| } |
| |
| public abstract ToolkitThreadBlockedHandler |
| getToolkitThreadBlockedHandler(); |
| |
| /** |
| * Helper function to reduce a Map with Long keys to a long array. |
| * <p> |
| * The map keys are sorted according to the native formats preference |
| * order. |
| */ |
| public static long[] keysToLongArray(SortedMap map) { |
| Set keySet = map.keySet(); |
| long[] retval = new long[keySet.size()]; |
| int i = 0; |
| for (Iterator iter = keySet.iterator(); iter.hasNext(); i++) { |
| retval[i] = ((Long)iter.next()).longValue(); |
| } |
| return retval; |
| } |
| |
| /** |
| * Helper function to reduce a Map with DataFlavor keys to a DataFlavor |
| * array. The array will be sorted according to |
| * <code>DataFlavorComparator</code>. |
| */ |
| public static DataFlavor[] keysToDataFlavorArray(Map map) { |
| return setToSortedDataFlavorArray(map.keySet(), map); |
| } |
| |
| /** |
| * Helper function to convert a Set of DataFlavors to a sorted array. |
| * The array will be sorted according to <code>DataFlavorComparator</code>. |
| */ |
| public static DataFlavor[] setToSortedDataFlavorArray(Set flavorsSet) { |
| DataFlavor[] flavors = new DataFlavor[flavorsSet.size()]; |
| flavorsSet.toArray(flavors); |
| final Comparator comparator = |
| new DataFlavorComparator(IndexedComparator.SELECT_WORST); |
| Arrays.sort(flavors, comparator); |
| return flavors; |
| } |
| |
| /** |
| * Helper function to convert a Set of DataFlavors to a sorted array. |
| * The array will be sorted according to a |
| * <code>DataFlavorComparator</code> created with the specified |
| * flavor-to-native map as an argument. |
| */ |
| public static DataFlavor[] setToSortedDataFlavorArray |
| (Set flavorsSet, Map flavorToNativeMap) |
| { |
| DataFlavor[] flavors = new DataFlavor[flavorsSet.size()]; |
| flavorsSet.toArray(flavors); |
| Comparator comparator = |
| new DataFlavorComparator(flavorToNativeMap, |
| IndexedComparator.SELECT_WORST); |
| Arrays.sort(flavors, comparator); |
| return flavors; |
| } |
| |
| /** |
| * Helper function to convert an InputStream to a byte[] array. |
| */ |
| protected static byte[] inputStreamToByteArray(InputStream str) |
| throws IOException |
| { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| int len = 0; |
| byte[] buf = new byte[8192]; |
| |
| while ((len = str.read(buf)) != -1) { |
| baos.write(buf, 0, len); |
| } |
| |
| return baos.toByteArray(); |
| } |
| |
| /** |
| * Returns platform-specific mappings for the specified native. |
| * If there are no platform-specific mappings for this native, the method |
| * returns an empty <code>List</code>. |
| */ |
| public List getPlatformMappingsForNative(String nat) { |
| return new ArrayList(); |
| } |
| |
| /** |
| * Returns platform-specific mappings for the specified flavor. |
| * If there are no platform-specific mappings for this flavor, the method |
| * returns an empty <code>List</code>. |
| */ |
| public List getPlatformMappingsForFlavor(DataFlavor df) { |
| return new ArrayList(); |
| } |
| |
| /** |
| * A Comparator which includes a helper function for comparing two Objects |
| * which are likely to be keys in the specified Map. |
| */ |
| public abstract static class IndexedComparator implements Comparator { |
| |
| /** |
| * The best Object (e.g., DataFlavor) will be the last in sequence. |
| */ |
| public static final boolean SELECT_BEST = true; |
| |
| /** |
| * The best Object (e.g., DataFlavor) will be the first in sequence. |
| */ |
| public static final boolean SELECT_WORST = false; |
| |
| protected final boolean order; |
| |
| public IndexedComparator() { |
| this(SELECT_BEST); |
| } |
| |
| public IndexedComparator(boolean order) { |
| this.order = order; |
| } |
| |
| /** |
| * Helper method to compare two objects by their Integer indices in the |
| * given map. If the map doesn't contain an entry for either of the |
| * objects, the fallback index will be used for the object instead. |
| * |
| * @param indexMap the map which maps objects into Integer indexes. |
| * @param obj1 the first object to be compared. |
| * @param obj2 the second object to be compared. |
| * @param fallbackIndex the Integer to be used as a fallback index. |
| * @return a negative integer, zero, or a positive integer as the |
| * first object is mapped to a less, equal to, or greater |
| * index than the second. |
| */ |
| protected static int compareIndices(Map indexMap, |
| Object obj1, Object obj2, |
| Integer fallbackIndex) { |
| Integer index1 = (Integer)indexMap.get(obj1); |
| Integer index2 = (Integer)indexMap.get(obj2); |
| |
| if (index1 == null) { |
| index1 = fallbackIndex; |
| } |
| if (index2 == null) { |
| index2 = fallbackIndex; |
| } |
| |
| return index1.compareTo(index2); |
| } |
| |
| /** |
| * Helper method to compare two objects by their Long indices in the |
| * given map. If the map doesn't contain an entry for either of the |
| * objects, the fallback index will be used for the object instead. |
| * |
| * @param indexMap the map which maps objects into Long indexes. |
| * @param obj1 the first object to be compared. |
| * @param obj2 the second object to be compared. |
| * @param fallbackIndex the Long to be used as a fallback index. |
| * @return a negative integer, zero, or a positive integer as the |
| * first object is mapped to a less, equal to, or greater |
| * index than the second. |
| */ |
| protected static int compareLongs(Map indexMap, |
| Object obj1, Object obj2, |
| Long fallbackIndex) { |
| Long index1 = (Long)indexMap.get(obj1); |
| Long index2 = (Long)indexMap.get(obj2); |
| |
| if (index1 == null) { |
| index1 = fallbackIndex; |
| } |
| if (index2 == null) { |
| index2 = fallbackIndex; |
| } |
| |
| return index1.compareTo(index2); |
| } |
| } |
| |
| /** |
| * An IndexedComparator which compares two String charsets. The comparison |
| * follows the rules outlined in DataFlavor.selectBestTextFlavor. In order |
| * to ensure that non-Unicode, non-ASCII, non-default charsets are sorted |
| * in alphabetical order, charsets are not automatically converted to their |
| * canonical forms. |
| */ |
| public static class CharsetComparator extends IndexedComparator { |
| private static final Map charsets; |
| private static String defaultEncoding; |
| |
| private static final Integer DEFAULT_CHARSET_INDEX = Integer.valueOf(2); |
| private static final Integer OTHER_CHARSET_INDEX = Integer.valueOf(1); |
| private static final Integer WORST_CHARSET_INDEX = Integer.valueOf(0); |
| private static final Integer UNSUPPORTED_CHARSET_INDEX = |
| Integer.valueOf(Integer.MIN_VALUE); |
| |
| private static final String UNSUPPORTED_CHARSET = "UNSUPPORTED"; |
| |
| static { |
| HashMap charsetsMap = new HashMap(8, 1.0f); |
| |
| // we prefer Unicode charsets |
| charsetsMap.put(canonicalName("UTF-16LE"), Integer.valueOf(4)); |
| charsetsMap.put(canonicalName("UTF-16BE"), Integer.valueOf(5)); |
| charsetsMap.put(canonicalName("UTF-8"), Integer.valueOf(6)); |
| charsetsMap.put(canonicalName("UTF-16"), Integer.valueOf(7)); |
| |
| // US-ASCII is the worst charset supported |
| charsetsMap.put(canonicalName("US-ASCII"), WORST_CHARSET_INDEX); |
| |
| String defEncoding = DataTransferer.canonicalName |
| (DataTransferer.getDefaultTextCharset()); |
| |
| if (charsetsMap.get(defaultEncoding) == null) { |
| charsetsMap.put(defaultEncoding, DEFAULT_CHARSET_INDEX); |
| } |
| charsetsMap.put(UNSUPPORTED_CHARSET, UNSUPPORTED_CHARSET_INDEX); |
| |
| charsets = Collections.unmodifiableMap(charsetsMap); |
| } |
| |
| public CharsetComparator() { |
| this(SELECT_BEST); |
| } |
| |
| public CharsetComparator(boolean order) { |
| super(order); |
| } |
| |
| /** |
| * Compares two String objects. Returns a negative integer, zero, |
| * or a positive integer as the first charset is worse than, equal to, |
| * or better than the second. |
| * |
| * @param obj1 the first charset to be compared |
| * @param obj2 the second charset to be compared |
| * @return a negative integer, zero, or a positive integer as the |
| * first argument is worse, equal to, or better than the |
| * second. |
| * @throws ClassCastException if either of the arguments is not |
| * instance of String |
| * @throws NullPointerException if either of the arguments is |
| * <code>null</code>. |
| */ |
| public int compare(Object obj1, Object obj2) { |
| String charset1 = null; |
| String charset2 = null; |
| if (order == SELECT_BEST) { |
| charset1 = (String)obj1; |
| charset2 = (String)obj2; |
| } else { |
| charset1 = (String)obj2; |
| charset2 = (String)obj1; |
| } |
| |
| return compareCharsets(charset1, charset2); |
| } |
| |
| /** |
| * Compares charsets. Returns a negative integer, zero, or a positive |
| * integer as the first charset is worse than, equal to, or better than |
| * the second. |
| * <p> |
| * Charsets are ordered according to the following rules: |
| * <ul> |
| * <li>All unsupported charsets are equal. |
| * <li>Any unsupported charset is worse than any supported charset. |
| * <li>Unicode charsets, such as "UTF-16", "UTF-8", "UTF-16BE" and |
| * "UTF-16LE", are considered best. |
| * <li>After them, platform default charset is selected. |
| * <li>"US-ASCII" is the worst of supported charsets. |
| * <li>For all other supported charsets, the lexicographically less |
| * one is considered the better. |
| * </ul> |
| * |
| * @param charset1 the first charset to be compared |
| * @param charset2 the second charset to be compared. |
| * @return a negative integer, zero, or a positive integer as the |
| * first argument is worse, equal to, or better than the |
| * second. |
| */ |
| protected int compareCharsets(String charset1, String charset2) { |
| charset1 = getEncoding(charset1); |
| charset2 = getEncoding(charset2); |
| |
| int comp = compareIndices(charsets, charset1, charset2, |
| OTHER_CHARSET_INDEX); |
| |
| if (comp == 0) { |
| return charset2.compareTo(charset1); |
| } |
| |
| return comp; |
| } |
| |
| /** |
| * Returns encoding for the specified charset according to the |
| * following rules: |
| * <ul> |
| * <li>If the charset is <code>null</code>, then <code>null</code> will |
| * be returned. |
| * <li>Iff the charset specifies an encoding unsupported by this JRE, |
| * <code>UNSUPPORTED_CHARSET</code> will be returned. |
| * <li>If the charset specifies an alias name, the corresponding |
| * canonical name will be returned iff the charset is a known |
| * Unicode, ASCII, or default charset. |
| * </ul> |
| * |
| * @param charset the charset. |
| * @return an encoding for this charset. |
| */ |
| protected static String getEncoding(String charset) { |
| if (charset == null) { |
| return null; |
| } else if (!DataTransferer.isEncodingSupported(charset)) { |
| return UNSUPPORTED_CHARSET; |
| } else { |
| // Only convert to canonical form if the charset is one |
| // of the charsets explicitly listed in the known charsets |
| // map. This will happen only for Unicode, ASCII, or default |
| // charsets. |
| String canonicalName = DataTransferer.canonicalName(charset); |
| return (charsets.containsKey(canonicalName)) |
| ? canonicalName |
| : charset; |
| } |
| } |
| } |
| |
| /** |
| * An IndexedComparator which compares two DataFlavors. For text flavors, |
| * the comparison follows the rules outlined in |
| * DataFlavor.selectBestTextFlavor. For non-text flavors, unknown |
| * application MIME types are preferred, followed by known |
| * application/x-java-* MIME types. Unknown application types are preferred |
| * because if the user provides his own data flavor, it will likely be the |
| * most descriptive one. For flavors which are otherwise equal, the |
| * flavors' native formats are compared, with greater long values |
| * taking precedence. |
| */ |
| public static class DataFlavorComparator extends IndexedComparator { |
| protected final Map flavorToFormatMap; |
| |
| private final CharsetComparator charsetComparator; |
| |
| private static final Map exactTypes; |
| private static final Map primaryTypes; |
| private static final Map nonTextRepresentations; |
| private static final Map textTypes; |
| private static final Map decodedTextRepresentations; |
| private static final Map encodedTextRepresentations; |
| |
| private static final Integer UNKNOWN_OBJECT_LOSES = |
| Integer.valueOf(Integer.MIN_VALUE); |
| private static final Integer UNKNOWN_OBJECT_WINS = |
| Integer.valueOf(Integer.MAX_VALUE); |
| |
| private static final Long UNKNOWN_OBJECT_LOSES_L = |
| Long.valueOf(Long.MIN_VALUE); |
| private static final Long UNKNOWN_OBJECT_WINS_L = |
| Long.valueOf(Long.MAX_VALUE); |
| |
| static { |
| { |
| HashMap exactTypesMap = new HashMap(4, 1.0f); |
| |
| // application/x-java-* MIME types |
| exactTypesMap.put("application/x-java-file-list", |
| Integer.valueOf(0)); |
| exactTypesMap.put("application/x-java-serialized-object", |
| Integer.valueOf(1)); |
| exactTypesMap.put("application/x-java-jvm-local-objectref", |
| Integer.valueOf(2)); |
| exactTypesMap.put("application/x-java-remote-object", |
| Integer.valueOf(3)); |
| |
| exactTypes = Collections.unmodifiableMap(exactTypesMap); |
| } |
| |
| { |
| HashMap primaryTypesMap = new HashMap(1, 1.0f); |
| |
| primaryTypesMap.put("application", Integer.valueOf(0)); |
| |
| primaryTypes = Collections.unmodifiableMap(primaryTypesMap); |
| } |
| |
| { |
| HashMap nonTextRepresentationsMap = new HashMap(3, 1.0f); |
| |
| nonTextRepresentationsMap.put(java.io.InputStream.class, |
| Integer.valueOf(0)); |
| nonTextRepresentationsMap.put(java.io.Serializable.class, |
| Integer.valueOf(1)); |
| |
| Class<?> remoteClass = RMI.remoteClass(); |
| if (remoteClass != null) { |
| nonTextRepresentationsMap.put(remoteClass, |
| Integer.valueOf(2)); |
| } |
| |
| nonTextRepresentations = |
| Collections.unmodifiableMap(nonTextRepresentationsMap); |
| } |
| |
| { |
| HashMap textTypesMap = new HashMap(16, 1.0f); |
| |
| // plain text |
| textTypesMap.put("text/plain", Integer.valueOf(0)); |
| |
| // stringFlavor |
| textTypesMap.put("application/x-java-serialized-object", |
| Integer.valueOf(1)); |
| |
| // misc |
| textTypesMap.put("text/calendar", Integer.valueOf(2)); |
| textTypesMap.put("text/css", Integer.valueOf(3)); |
| textTypesMap.put("text/directory", Integer.valueOf(4)); |
| textTypesMap.put("text/parityfec", Integer.valueOf(5)); |
| textTypesMap.put("text/rfc822-headers", Integer.valueOf(6)); |
| textTypesMap.put("text/t140", Integer.valueOf(7)); |
| textTypesMap.put("text/tab-separated-values", Integer.valueOf(8)); |
| textTypesMap.put("text/uri-list", Integer.valueOf(9)); |
| |
| // enriched |
| textTypesMap.put("text/richtext", Integer.valueOf(10)); |
| textTypesMap.put("text/enriched", Integer.valueOf(11)); |
| textTypesMap.put("text/rtf", Integer.valueOf(12)); |
| |
| // markup |
| textTypesMap.put("text/html", Integer.valueOf(13)); |
| textTypesMap.put("text/xml", Integer.valueOf(14)); |
| textTypesMap.put("text/sgml", Integer.valueOf(15)); |
| |
| textTypes = Collections.unmodifiableMap(textTypesMap); |
| } |
| |
| { |
| HashMap decodedTextRepresentationsMap = new HashMap(4, 1.0f); |
| |
| decodedTextRepresentationsMap.put |
| (DataTransferer.charArrayClass, Integer.valueOf(0)); |
| decodedTextRepresentationsMap.put |
| (java.nio.CharBuffer.class, Integer.valueOf(1)); |
| decodedTextRepresentationsMap.put |
| (java.lang.String.class, Integer.valueOf(2)); |
| decodedTextRepresentationsMap.put |
| (java.io.Reader.class, Integer.valueOf(3)); |
| |
| decodedTextRepresentations = |
| Collections.unmodifiableMap(decodedTextRepresentationsMap); |
| } |
| |
| { |
| HashMap encodedTextRepresentationsMap = new HashMap(3, 1.0f); |
| |
| encodedTextRepresentationsMap.put |
| (DataTransferer.byteArrayClass, Integer.valueOf(0)); |
| encodedTextRepresentationsMap.put |
| (java.nio.ByteBuffer.class, Integer.valueOf(1)); |
| encodedTextRepresentationsMap.put |
| (java.io.InputStream.class, Integer.valueOf(2)); |
| |
| encodedTextRepresentations = |
| Collections.unmodifiableMap(encodedTextRepresentationsMap); |
| } |
| } |
| |
| public DataFlavorComparator() { |
| this(SELECT_BEST); |
| } |
| |
| public DataFlavorComparator(boolean order) { |
| super(order); |
| |
| charsetComparator = new CharsetComparator(order); |
| flavorToFormatMap = Collections.EMPTY_MAP; |
| } |
| |
| public DataFlavorComparator(Map map) { |
| this(map, SELECT_BEST); |
| } |
| |
| public DataFlavorComparator(Map map, boolean order) { |
| super(order); |
| |
| charsetComparator = new CharsetComparator(order); |
| HashMap hashMap = new HashMap(map.size()); |
| hashMap.putAll(map); |
| flavorToFormatMap = Collections.unmodifiableMap(hashMap); |
| } |
| |
| public int compare(Object obj1, Object obj2) { |
| DataFlavor flavor1 = null; |
| DataFlavor flavor2 = null; |
| if (order == SELECT_BEST) { |
| flavor1 = (DataFlavor)obj1; |
| flavor2 = (DataFlavor)obj2; |
| } else { |
| flavor1 = (DataFlavor)obj2; |
| flavor2 = (DataFlavor)obj1; |
| } |
| |
| if (flavor1.equals(flavor2)) { |
| return 0; |
| } |
| |
| int comp = 0; |
| |
| String primaryType1 = flavor1.getPrimaryType(); |
| String subType1 = flavor1.getSubType(); |
| String mimeType1 = primaryType1 + "/" + subType1; |
| Class class1 = flavor1.getRepresentationClass(); |
| |
| String primaryType2 = flavor2.getPrimaryType(); |
| String subType2 = flavor2.getSubType(); |
| String mimeType2 = primaryType2 + "/" + subType2; |
| Class class2 = flavor2.getRepresentationClass(); |
| |
| if (flavor1.isFlavorTextType() && flavor2.isFlavorTextType()) { |
| // First, compare MIME types |
| comp = compareIndices(textTypes, mimeType1, mimeType2, |
| UNKNOWN_OBJECT_LOSES); |
| if (comp != 0) { |
| return comp; |
| } |
| |
| // Only need to test one flavor because they both have the |
| // same MIME type. Also don't need to worry about accidentally |
| // passing stringFlavor because either |
| // 1. Both flavors are stringFlavor, in which case the |
| // equality test at the top of the function succeeded. |
| // 2. Only one flavor is stringFlavor, in which case the MIME |
| // type comparison returned a non-zero value. |
| if (doesSubtypeSupportCharset(flavor1)) { |
| // Next, prefer the decoded text representations of Reader, |
| // String, CharBuffer, and [C, in that order. |
| comp = compareIndices(decodedTextRepresentations, class1, |
| class2, UNKNOWN_OBJECT_LOSES); |
| if (comp != 0) { |
| return comp; |
| } |
| |
| // Next, compare charsets |
| comp = charsetComparator.compareCharsets |
| (DataTransferer.getTextCharset(flavor1), |
| DataTransferer.getTextCharset(flavor2)); |
| if (comp != 0) { |
| return comp; |
| } |
| } |
| |
| // Finally, prefer the encoded text representations of |
| // InputStream, ByteBuffer, and [B, in that order. |
| comp = compareIndices(encodedTextRepresentations, class1, |
| class2, UNKNOWN_OBJECT_LOSES); |
| if (comp != 0) { |
| return comp; |
| } |
| } else { |
| // First, prefer application types. |
| comp = compareIndices(primaryTypes, primaryType1, primaryType2, |
| UNKNOWN_OBJECT_LOSES); |
| if (comp != 0) { |
| return comp; |
| } |
| |
| // Next, look for application/x-java-* types. Prefer unknown |
| // MIME types because if the user provides his own data flavor, |
| // it will likely be the most descriptive one. |
| comp = compareIndices(exactTypes, mimeType1, mimeType2, |
| UNKNOWN_OBJECT_WINS); |
| if (comp != 0) { |
| return comp; |
| } |
| |
| // Finally, prefer the representation classes of Remote, |
| // Serializable, and InputStream, in that order. |
| comp = compareIndices(nonTextRepresentations, class1, class2, |
| UNKNOWN_OBJECT_LOSES); |
| if (comp != 0) { |
| return comp; |
| } |
| } |
| |
| // As a last resort, take the DataFlavor with the greater integer |
| // format. |
| return compareLongs(flavorToFormatMap, flavor1, flavor2, |
| UNKNOWN_OBJECT_LOSES_L); |
| } |
| } |
| |
| /* |
| * Given the Map that maps objects to Integer indices and a boolean value, |
| * this Comparator imposes a direct or reverse order on set of objects. |
| * <p> |
| * If the specified boolean value is SELECT_BEST, the Comparator imposes the |
| * direct index-based order: an object A is greater than an object B if and |
| * only if the index of A is greater than the index of B. An object that |
| * doesn't have an associated index is less or equal than any other object. |
| * <p> |
| * If the specified boolean value is SELECT_WORST, the Comparator imposes the |
| * reverse index-based order: an object A is greater than an object B if and |
| * only if A is less than B with the direct index-based order. |
| */ |
| public static class IndexOrderComparator extends IndexedComparator { |
| private final Map indexMap; |
| private static final Integer FALLBACK_INDEX = |
| Integer.valueOf(Integer.MIN_VALUE); |
| |
| public IndexOrderComparator(Map indexMap) { |
| super(SELECT_BEST); |
| this.indexMap = indexMap; |
| } |
| |
| public IndexOrderComparator(Map indexMap, boolean order) { |
| super(order); |
| this.indexMap = indexMap; |
| } |
| |
| public int compare(Object obj1, Object obj2) { |
| if (order == SELECT_WORST) { |
| return -compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX); |
| } else { |
| return compareIndices(indexMap, obj1, obj2, FALLBACK_INDEX); |
| } |
| } |
| } |
| |
| /** |
| * A class that provides access to java.rmi.Remote and java.rmi.MarshalledObject |
| * without creating a static dependency. |
| */ |
| private static class RMI { |
| private static final Class<?> remoteClass = getClass("java.rmi.Remote"); |
| private static final Class<?> marshallObjectClass = |
| getClass("java.rmi.MarshalledObject"); |
| private static final Constructor<?> marshallCtor = |
| getConstructor(marshallObjectClass, Object.class); |
| private static final Method marshallGet = |
| getMethod(marshallObjectClass, "get"); |
| |
| private static Class<?> getClass(String name) { |
| try { |
| return Class.forName(name, true, null); |
| } catch (ClassNotFoundException e) { |
| return null; |
| } |
| } |
| |
| private static Constructor<?> getConstructor(Class<?> c, Class<?>... types) { |
| try { |
| return (c == null) ? null : c.getDeclaredConstructor(types); |
| } catch (NoSuchMethodException x) { |
| throw new AssertionError(x); |
| } |
| } |
| |
| private static Method getMethod(Class<?> c, String name, Class<?>... types) { |
| try { |
| return (c == null) ? null : c.getMethod(name, types); |
| } catch (NoSuchMethodException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| /** |
| * Returns {@code true} if the given class is java.rmi.Remote. |
| */ |
| static boolean isRemote(Class<?> c) { |
| return (remoteClass == null) ? null : remoteClass.isAssignableFrom(c); |
| } |
| |
| /** |
| * Returns java.rmi.Remote.class if RMI is present; otherwise {@code null}. |
| */ |
| static Class<?> remoteClass() { |
| return remoteClass; |
| } |
| |
| /** |
| * Returns a new MarshalledObject containing the serialized representation |
| * of the given object. |
| */ |
| static Object newMarshalledObject(Object obj) throws IOException { |
| try { |
| return marshallCtor.newInstance(obj); |
| } catch (InstantiationException x) { |
| throw new AssertionError(x); |
| } catch (IllegalAccessException x) { |
| throw new AssertionError(x); |
| } catch (InvocationTargetException x) { |
| Throwable cause = x.getCause(); |
| if (cause instanceof IOException) |
| throw (IOException)cause; |
| throw new AssertionError(x); |
| } |
| } |
| |
| /** |
| * Returns a new copy of the contained marshalled object. |
| */ |
| static Object getMarshalledObject(Object obj) |
| throws IOException, ClassNotFoundException |
| { |
| try { |
| return marshallGet.invoke(obj); |
| } catch (IllegalAccessException x) { |
| throw new AssertionError(x); |
| } catch (InvocationTargetException x) { |
| Throwable cause = x.getCause(); |
| if (cause instanceof IOException) |
| throw (IOException)cause; |
| if (cause instanceof ClassNotFoundException) |
| throw (ClassNotFoundException)cause; |
| throw new AssertionError(x); |
| } |
| } |
| } |
| } |