| /* |
| * Copyright (c) 2005, 2017, 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 javax.tools; |
| |
| import java.io.Closeable; |
| import java.io.Flushable; |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.ServiceLoader; |
| import java.util.Set; |
| |
| import static javax.tools.JavaFileObject.Kind; |
| |
| /** |
| * File manager for tools operating on Java™ programming language |
| * source and class files. In this context, <em>file</em> means an |
| * abstraction of regular files and other sources of data. |
| * |
| * <p>When constructing new JavaFileObjects, the file manager must |
| * determine where to create them. For example, if a file manager |
| * manages regular files on a file system, it would most likely have a |
| * current/working directory to use as default location when creating |
| * or finding files. A number of hints can be provided to a file |
| * manager as to where to create files. Any file manager might choose |
| * to ignore these hints. |
| * |
| * <p>Some methods in this interface use class names. Such class |
| * names must be given in the Java Virtual Machine internal form of |
| * fully qualified class and interface names. For convenience '.' |
| * and '/' are interchangeable. The internal form is defined in |
| * chapter four of |
| * <cite>The Java™ Virtual Machine Specification</cite>. |
| |
| * <blockquote><p> |
| * <i>Discussion:</i> this means that the names |
| * "java/lang.package-info", "java/lang/package-info", |
| * "java.lang.package-info", are valid and equivalent. Compare to |
| * binary name as defined in |
| * <cite>The Java™ Language Specification</cite>, |
| * section 13.1 "The Form of a Binary". |
| * </p></blockquote> |
| * |
| * <p>The case of names is significant. All names should be treated |
| * as case-sensitive. For example, some file systems have |
| * case-insensitive, case-aware file names. File objects representing |
| * such files should take care to preserve case by using {@link |
| * java.io.File#getCanonicalFile} or similar means. If the system is |
| * not case-aware, file objects must use other means to preserve case. |
| * |
| * <p><em><a name="relative_name">Relative names</a>:</em> some |
| * methods in this interface use relative names. A relative name is a |
| * non-null, non-empty sequence of path segments separated by '/'. |
| * '.' or '..' are invalid path segments. A valid relative name must |
| * match the "path-rootless" rule of <a |
| * href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986</a>, |
| * section 3.3. Informally, this should be true: |
| * |
| * <!-- URI.create(relativeName).normalize().getPath().equals(relativeName) --> |
| * <pre> URI.{@linkplain java.net.URI#create create}(relativeName).{@linkplain java.net.URI#normalize normalize}().{@linkplain java.net.URI#getPath getPath}().equals(relativeName)</pre> |
| * |
| * <p>All methods in this interface might throw a SecurityException. |
| * |
| * <p>An object of this interface is not required to support |
| * multi-threaded access, that is, be synchronized. However, it must |
| * support concurrent access to different file objects created by this |
| * object. |
| * |
| * <p><em>Implementation note:</em> a consequence of this requirement |
| * is that a trivial implementation of output to a {@linkplain |
| * java.util.jar.JarOutputStream} is not a sufficient implementation. |
| * That is, rather than creating a JavaFileObject that returns the |
| * JarOutputStream directly, the contents must be cached until closed |
| * and then written to the JarOutputStream. |
| * |
| * <p>Unless explicitly allowed, all methods in this interface might |
| * throw a NullPointerException if given a {@code null} argument. |
| * |
| * @author Peter von der Ahé |
| * @author Jonathan Gibbons |
| * @see JavaFileObject |
| * @see FileObject |
| * @since 1.6 |
| */ |
| public interface JavaFileManager extends Closeable, Flushable, OptionChecker { |
| |
| /** |
| * Interface for locations of file objects. Used by file managers |
| * to determine where to place or search for file objects. |
| * |
| * <p>Informally, a {@code Location} corresponds to a "search path", such as a class |
| * path or module path, as used by command-line tools that use the default file system. |
| * |
| * <p>Some locations are typically used to identify a place in which |
| * a tool can find files to be read; others are typically used to identify |
| * a place where a tool can write files. If a location is used to identify |
| * a place for reading files, those files may be organized in a simple |
| * <em>package/class</em> hierarchy: such locations are described as |
| * <strong>package-oriented</strong>. |
| * Alternatively, the files may be organized in a <em>module/package/class</em> |
| * hierarchy: such locations are described as <strong>module-oriented</strong>. |
| * If a location is typically used to identify a place where a tool can write files, |
| * it is up to the tool that writes the files to specify how those files will be |
| * organized. |
| * |
| * <p>You can access the classes in a package-oriented location using methods like |
| * {@link JavaFileManager#getJavaFileForInput} or {@link JavaFileManager#list}. |
| * It is not possible to directly list the classes in a module-oriented |
| * location. Instead, you can get a package-oriented location for any specific module |
| * using methods like {@link JavaFileManager#getLocationForModule} or |
| * {@link JavaFileManager#listLocationsForModules}. |
| */ |
| interface Location { |
| /** |
| * Returns the name of this location. |
| * |
| * @return a name |
| */ |
| String getName(); |
| |
| /** |
| * Determines if this is an output location. |
| * An output location is a location that is conventionally used for |
| * output. |
| * |
| * @apiNote An output location may be used to write files in either |
| * a package-oriented organization or in a module-oriented organization. |
| * |
| * @return true if this is an output location, false otherwise |
| */ |
| boolean isOutputLocation(); |
| |
| /** |
| * Indicates if this location is module-oriented location, and therefore |
| * expected to contain classes in a <em>module/package/class</em> |
| * hierarchy, as compared to a package-oriented location, which |
| * is expected to contain classes in a <em>package/class</em> hierarchy. |
| * The result of this method is undefined if this is an output |
| * location. |
| * |
| * @implNote This implementation returns true if the name includes |
| * the word "MODULE". |
| * |
| * @return true if this location is expected to contain modules |
| * @since 9 |
| * @spec JPMS |
| */ |
| default boolean isModuleOrientedLocation() { |
| return getName().matches("\\bMODULE\\b"); |
| } |
| } |
| |
| /** |
| * Returns a class loader for loading plug-ins from the given |
| * package-oriented location. |
| * For example, to load annotation processors, |
| * a compiler will request a class loader for the {@link |
| * StandardLocation#ANNOTATION_PROCESSOR_PATH |
| * ANNOTATION_PROCESSOR_PATH} location. |
| * |
| * @param location a location |
| * @return a class loader for the given location; or {@code null} |
| * if loading plug-ins from the given location is disabled or if |
| * the location is not known |
| * @throws SecurityException if a class loader can not be created |
| * in the current security context |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| * @throws IllegalArgumentException if the location is a module-oriented location |
| */ |
| ClassLoader getClassLoader(Location location); |
| |
| /** |
| * Lists all file objects matching the given criteria in the given |
| * package-oriented location. |
| * List file objects in "subpackages" if recurse is true. |
| * |
| * <p>Note: even if the given location is unknown to this file |
| * manager, it may not return {@code null}. Also, an unknown |
| * location may not cause an exception. |
| * |
| * @param location a location |
| * @param packageName a package name |
| * @param kinds return objects only of these kinds |
| * @param recurse if true include "subpackages" |
| * @return an Iterable of file objects matching the given criteria |
| * @throws IOException if an I/O error occurred, or if {@link |
| * #close} has been called and this file manager cannot be |
| * reopened |
| * @throws IllegalArgumentException if the location is a module-oriented location |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| Iterable<JavaFileObject> list(Location location, |
| String packageName, |
| Set<Kind> kinds, |
| boolean recurse) |
| throws IOException; |
| |
| /** |
| * Infers a binary name of a file object based on a package-oriented location. |
| * The binary name returned might not be a valid binary name according to |
| * <cite>The Java™ Language Specification</cite>. |
| * |
| * @param location a location |
| * @param file a file object |
| * @return a binary name or {@code null} the file object is not |
| * found in the given location |
| * @throws IllegalArgumentException if the location is a module-oriented location |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| String inferBinaryName(Location location, JavaFileObject file); |
| |
| /** |
| * Compares two file objects and return true if they represent the |
| * same underlying object. |
| * |
| * @param a a file object |
| * @param b a file object |
| * @return true if the given file objects represent the same |
| * underlying object |
| * |
| * @throws IllegalArgumentException if either of the arguments |
| * were created with another file manager and this file manager |
| * does not support foreign file objects |
| */ |
| boolean isSameFile(FileObject a, FileObject b); |
| |
| /** |
| * Handles one option. If {@code current} is an option to this |
| * file manager it will consume any arguments to that option from |
| * {@code remaining} and return true, otherwise return false. |
| * |
| * @param current current option |
| * @param remaining remaining options |
| * @return true if this option was handled by this file manager, |
| * false otherwise |
| * @throws IllegalArgumentException if this option to this file |
| * manager is used incorrectly |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| boolean handleOption(String current, Iterator<String> remaining); |
| |
| /** |
| * Determines if a location is known to this file manager. |
| * |
| * @param location a location |
| * @return true if the location is known |
| */ |
| boolean hasLocation(Location location); |
| |
| /** |
| * Returns a {@linkplain JavaFileObject file object} for input |
| * representing the specified class of the specified kind in the |
| * given package-oriented location. |
| * |
| * @param location a location |
| * @param className the name of a class |
| * @param kind the kind of file, must be one of {@link |
| * JavaFileObject.Kind#SOURCE SOURCE} or {@link |
| * JavaFileObject.Kind#CLASS CLASS} |
| * @return a file object, might return {@code null} if the |
| * file does not exist |
| * @throws IllegalArgumentException if the location is not known |
| * to this file manager and the file manager does not support |
| * unknown locations, or if the kind is not valid, or if the |
| * location is a module-oriented location |
| * @throws IOException if an I/O error occurred, or if {@link |
| * #close} has been called and this file manager cannot be |
| * reopened |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| JavaFileObject getJavaFileForInput(Location location, |
| String className, |
| Kind kind) |
| throws IOException; |
| |
| /** |
| * Returns a {@linkplain JavaFileObject file object} for output |
| * representing the specified class of the specified kind in the |
| * given package-oriented location. |
| * |
| * <p>Optionally, this file manager might consider the sibling as |
| * a hint for where to place the output. The exact semantics of |
| * this hint is unspecified. The JDK compiler, javac, for |
| * example, will place class files in the same directories as |
| * originating source files unless a class file output directory |
| * is provided. To facilitate this behavior, javac might provide |
| * the originating source file as sibling when calling this |
| * method. |
| * |
| * @param location a package-oriented location |
| * @param className the name of a class |
| * @param kind the kind of file, must be one of {@link |
| * JavaFileObject.Kind#SOURCE SOURCE} or {@link |
| * JavaFileObject.Kind#CLASS CLASS} |
| * @param sibling a file object to be used as hint for placement; |
| * might be {@code null} |
| * @return a file object for output |
| * @throws IllegalArgumentException if sibling is not known to |
| * this file manager, or if the location is not known to this file |
| * manager and the file manager does not support unknown |
| * locations, or if the kind is not valid, or if the location is |
| * not an output location |
| * @throws IOException if an I/O error occurred, or if {@link |
| * #close} has been called and this file manager cannot be |
| * reopened |
| * @throws IllegalStateException {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| JavaFileObject getJavaFileForOutput(Location location, |
| String className, |
| Kind kind, |
| FileObject sibling) |
| throws IOException; |
| |
| /** |
| * Returns a {@linkplain FileObject file object} for input |
| * representing the specified <a href="JavaFileManager.html#relative_name">relative |
| * name</a> in the specified package in the given package-oriented location. |
| * |
| * <p>If the returned object represents a {@linkplain |
| * JavaFileObject.Kind#SOURCE source} or {@linkplain |
| * JavaFileObject.Kind#CLASS class} file, it must be an instance |
| * of {@link JavaFileObject}. |
| * |
| * <p>Informally, the file object returned by this method is |
| * located in the concatenation of the location, package name, and |
| * relative name. For example, to locate the properties file |
| * "resources/compiler.properties" in the package |
| * "com.sun.tools.javac" in the {@linkplain |
| * StandardLocation#SOURCE_PATH SOURCE_PATH} location, this method |
| * might be called like so: |
| * |
| * <pre>getFileForInput(SOURCE_PATH, "com.sun.tools.javac", "resources/compiler.properties");</pre> |
| * |
| * <p>If the call was executed on Windows, with SOURCE_PATH set to |
| * <code>"C:\Documents and Settings\UncleBob\src\share\classes"</code>, |
| * a valid result would be a file object representing the file |
| * <code>"C:\Documents and Settings\UncleBob\src\share\classes\com\sun\tools\javac\resources\compiler.properties"</code>. |
| * |
| * @param location a package-oriented location |
| * @param packageName a package name |
| * @param relativeName a relative name |
| * @return a file object, might return {@code null} if the file |
| * does not exist |
| * @throws IllegalArgumentException if the location is not known |
| * to this file manager and the file manager does not support |
| * unknown locations, or if {@code relativeName} is not valid, |
| * or if the location is a module-oriented location |
| * @throws IOException if an I/O error occurred, or if {@link |
| * #close} has been called and this file manager cannot be |
| * reopened |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| FileObject getFileForInput(Location location, |
| String packageName, |
| String relativeName) |
| throws IOException; |
| |
| /** |
| * Returns a {@linkplain FileObject file object} for output |
| * representing the specified <a href="JavaFileManager.html#relative_name">relative |
| * name</a> in the specified package in the given location. |
| * |
| * <p>Optionally, this file manager might consider the sibling as |
| * a hint for where to place the output. The exact semantics of |
| * this hint is unspecified. The JDK compiler, javac, for |
| * example, will place class files in the same directories as |
| * originating source files unless a class file output directory |
| * is provided. To facilitate this behavior, javac might provide |
| * the originating source file as sibling when calling this |
| * method. |
| * |
| * <p>If the returned object represents a {@linkplain |
| * JavaFileObject.Kind#SOURCE source} or {@linkplain |
| * JavaFileObject.Kind#CLASS class} file, it must be an instance |
| * of {@link JavaFileObject}. |
| * |
| * <p>Informally, the file object returned by this method is |
| * located in the concatenation of the location, package name, and |
| * relative name or next to the sibling argument. See {@link |
| * #getFileForInput getFileForInput} for an example. |
| * |
| * @param location an output location |
| * @param packageName a package name |
| * @param relativeName a relative name |
| * @param sibling a file object to be used as hint for placement; |
| * might be {@code null} |
| * @return a file object |
| * @throws IllegalArgumentException if sibling is not known to |
| * this file manager, or if the location is not known to this file |
| * manager and the file manager does not support unknown |
| * locations, or if {@code relativeName} is not valid, |
| * or if the location is not an output location |
| * @throws IOException if an I/O error occurred, or if {@link |
| * #close} has been called and this file manager cannot be |
| * reopened |
| * @throws IllegalStateException if {@link #close} has been called |
| * and this file manager cannot be reopened |
| */ |
| FileObject getFileForOutput(Location location, |
| String packageName, |
| String relativeName, |
| FileObject sibling) |
| throws IOException; |
| |
| /** |
| * Flushes any resources opened for output by this file manager |
| * directly or indirectly. Flushing a closed file manager has no |
| * effect. |
| * |
| * @throws IOException if an I/O error occurred |
| * @see #close |
| */ |
| @Override |
| void flush() throws IOException; |
| |
| /** |
| * Releases any resources opened by this file manager directly or |
| * indirectly. This might render this file manager useless and |
| * the effect of subsequent calls to methods on this object or any |
| * objects obtained through this object is undefined unless |
| * explicitly allowed. However, closing a file manager which has |
| * already been closed has no effect. |
| * |
| * @throws IOException if an I/O error occurred |
| * @see #flush |
| */ |
| @Override |
| void close() throws IOException; |
| |
| /** |
| * Gets a location for a named module within a location, which may be either |
| * a module-oriented location or an output location. |
| * The result will be an output location if the given location is |
| * an output location, or it will be a package-oriented location. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location the module-oriented location |
| * @param moduleName the name of the module to be found |
| * @return the location for the named module |
| * |
| * @throws IOException if an I/O error occurred |
| * @throws UnsupportedOperationException if this operation if not supported by this file manager |
| * @throws IllegalArgumentException if the location is neither an output location nor a |
| * module-oriented location |
| * @since 9 |
| * @spec JPMS |
| */ // TODO: describe failure modes |
| default Location getLocationForModule(Location location, String moduleName) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Gets a location for the module containing a specific file |
| * to be found within a location, which may be either |
| * a module-oriented location or an output location. |
| * The result will be an output location if the given location is |
| * an output location, or it will be a package-oriented location. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location the module-oriented location |
| * @param fo the file |
| * @return the module containing the file |
| * |
| * @throws IOException if an I/O error occurred |
| * @throws UnsupportedOperationException if this operation if not supported by this file manager |
| * @throws IllegalArgumentException if the location is neither an output location nor a |
| * module-oriented location |
| * @since 9 |
| * @spec JPMS |
| */ |
| default Location getLocationForModule(Location location, JavaFileObject fo) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Get a service loader for a specific service class from a given location. |
| * |
| * If the location is a module-oriented location, the service loader will use the |
| * service declarations in the modules found in that location. Otherwise, a service loader |
| * is created using the package-oriented location, in which case, the services are |
| * determined using the provider-configuration files in {@code META-INF/services}. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location the module-oriented location |
| * @param service the {@code Class} object of the service class |
| * @param <S> the service class |
| * @return a service loader for the given service class |
| * |
| * @throws IOException if an I/O error occurred |
| * @throws UnsupportedOperationException if this operation if not supported by this file manager |
| * @since 9 |
| * @spec JPMS |
| */ // TODO: describe failure modes |
| default <S> ServiceLoader<S> getServiceLoader(Location location, Class<S> service) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Infer the name of the module from its location, as returned by |
| * {@code getLocationForModule} or {@code listModuleLocations}. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location a package-oriented location representing a module |
| * @return the name of the module |
| * |
| * @throws IOException if an I/O error occurred |
| * @throws UnsupportedOperationException if this operation if not supported by this file manager |
| * @throws IllegalArgumentException if the location is not one known to this file manager |
| * @since 9 |
| * @spec JPMS |
| */ // TODO: describe failure modes |
| default String inferModuleName(Location location) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Lists the locations for all the modules in a module-oriented location or an output location. |
| * The locations that are returned will be output locations if the given location is an output, |
| * or it will be a package-oriented locations. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location the module-oriented location for which to list the modules |
| * @return a series of sets of locations containing modules |
| * |
| * @throws IOException if an I/O error occurred |
| * @throws UnsupportedOperationException if this operation if not supported by this file manager |
| * @throws IllegalArgumentException if the location is not a module-oriented location |
| * @since 9 |
| * @spec JPMS |
| */ // TODO: describe failure modes |
| default Iterable<Set<Location>> listLocationsForModules(Location location) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Determines whether or not a given file object is "contained in" a specified location. |
| * |
| * <p>For a package-oriented location, a file object is contained in the location if there exist |
| * values for <i>packageName</i> and <i>relativeName</i> such that either of the following |
| * calls would return the {@link #isSameFile same} file object: |
| * <pre> |
| * getFileForInput(location, <i>packageName</i>, <i>relativeName</i>) |
| * getFileForOutput(location, <i>packageName</i>, <i>relativeName</i>, null) |
| * </pre> |
| * |
| * <p>For a module-oriented location, a file object is contained in the location if there exists |
| * a module that may be obtained by the call: |
| * <pre> |
| * getLocationForModule(location, <i>moduleName</i>) |
| * </pre> |
| * such that the file object is contained in the (package-oriented) location for that module. |
| * |
| * @implSpec This implementation throws {@code UnsupportedOperationException}. |
| * |
| * @param location the location |
| * @param fo the file object |
| * @return whether or not the file is contained in the location |
| * |
| * @throws IOException if there is a problem determining the result |
| * @throws UnsupportedOperationException if the method is not supported |
| * |
| * @since 9 |
| */ |
| |
| default boolean contains(Location location, FileObject fo) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| } |
