| /* |
| * Copyright (c) 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 jdk.xml.internal; |
| |
| import com.sun.org.apache.xalan.internal.utils.XMLSecurityManager; |
| import com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl; |
| import com.sun.org.apache.xerces.internal.impl.Constants; |
| import com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl; |
| import com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl; |
| import javax.xml.XMLConstants; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParserFactory; |
| import javax.xml.transform.TransformerConfigurationException; |
| import javax.xml.transform.sax.SAXTransformerFactory; |
| import org.w3c.dom.Document; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXNotRecognizedException; |
| import org.xml.sax.SAXNotSupportedException; |
| import org.xml.sax.XMLReader; |
| |
| /** |
| * Constants for use across JAXP processors. |
| */ |
| public class JdkXmlUtils { |
| private static final String DOM_FACTORY_ID = "javax.xml.parsers.DocumentBuilderFactory"; |
| private static final String SAX_FACTORY_ID = "javax.xml.parsers.SAXParserFactory"; |
| private static final String SAX_DRIVER = "org.xml.sax.driver"; |
| |
| /** |
| * Xerces features |
| */ |
| public static final String NAMESPACES_FEATURE = |
| Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACES_FEATURE; |
| public static final String NAMESPACE_PREFIXES_FEATURE = |
| Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACE_PREFIXES_FEATURE; |
| |
| /** |
| * jdk.xml.overrideDefaultParser: enables the use of a 3rd party's parser |
| * implementation to override the system-default parser. |
| */ |
| public static final String OVERRIDE_PARSER = "jdk.xml.overrideDefaultParser"; |
| public static final boolean OVERRIDE_PARSER_DEFAULT = SecuritySupport.getJAXPSystemProperty( |
| Boolean.class, OVERRIDE_PARSER, "false"); |
| |
| /** |
| * Values for a feature |
| */ |
| public static final String FEATURE_TRUE = "true"; |
| public static final String FEATURE_FALSE = "false"; |
| |
| /** |
| * The system-default factory |
| */ |
| private static final SAXParserFactory defaultSAXFactory = getSAXFactory(false); |
| |
| /** |
| * Returns the value. |
| * |
| * @param value the specified value |
| * @param defValue the default value |
| * @return the value, or the default value if the value is null |
| */ |
| public static int getValue(Object value, int defValue) { |
| if (value == null) { |
| return defValue; |
| } |
| |
| if (value instanceof Number) { |
| return ((Number) value).intValue(); |
| } else if (value instanceof String) { |
| return Integer.parseInt(String.valueOf(value)); |
| } else { |
| throw new IllegalArgumentException("Unexpected class: " |
| + value.getClass()); |
| } |
| } |
| |
| /** |
| * Sets the XMLReader instance with the specified property if the the |
| * property is supported, ignores error if not, issues a warning if so |
| * requested. |
| * |
| * @param reader an XMLReader instance |
| * @param property the name of the property |
| * @param value the value of the property |
| * @param warn a flag indicating whether a warning should be issued |
| */ |
| public static void setXMLReaderPropertyIfSupport(XMLReader reader, String property, |
| Object value, boolean warn) { |
| try { |
| reader.setProperty(property, value); |
| } catch (SAXNotRecognizedException | SAXNotSupportedException e) { |
| if (warn) { |
| XMLSecurityManager.printWarning(reader.getClass().getName(), |
| property, e); |
| } |
| } |
| } |
| |
| /** |
| * Returns an XMLReader instance. If overrideDefaultParser is requested, use |
| * SAXParserFactory or XMLReaderFactory, otherwise use the system-default |
| * SAXParserFactory to locate an XMLReader. |
| * |
| * @param overrideDefaultParser a flag indicating whether a 3rd party's |
| * parser implementation may be used to override the system-default one |
| * @param secureProcessing a flag indicating whether secure processing is |
| * requested |
| * @return an XMLReader instance |
| */ |
| public static XMLReader getXMLReader(boolean overrideDefaultParser, |
| boolean secureProcessing) { |
| SAXParserFactory saxFactory; |
| XMLReader reader = null; |
| String spSAXDriver = SecuritySupport.getSystemProperty(SAX_DRIVER); |
| if (spSAXDriver != null) { |
| reader = getXMLReaderWXMLReaderFactory(); |
| } else if (overrideDefaultParser) { |
| reader = getXMLReaderWSAXFactory(overrideDefaultParser); |
| } |
| |
| if (reader != null) { |
| if (secureProcessing) { |
| try { |
| reader.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, secureProcessing); |
| } catch (SAXException e) { |
| XMLSecurityManager.printWarning(reader.getClass().getName(), |
| XMLConstants.FEATURE_SECURE_PROCESSING, e); |
| } |
| } |
| try { |
| reader.setFeature(NAMESPACES_FEATURE, true); |
| reader.setFeature(NAMESPACE_PREFIXES_FEATURE, false); |
| } catch (SAXException se) { |
| // older version of a parser |
| } |
| return reader; |
| } |
| |
| // use the system-default |
| saxFactory = defaultSAXFactory; |
| |
| try { |
| reader = saxFactory.newSAXParser().getXMLReader(); |
| } catch (ParserConfigurationException | SAXException ex) { |
| // shall not happen with the system-default reader |
| } |
| return reader; |
| } |
| |
| /** |
| * Creates a system-default DOM Document. |
| * |
| * @return a DOM Document instance |
| */ |
| public static Document getDOMDocument() { |
| try { |
| DocumentBuilderFactory dbf = JdkXmlUtils.getDOMFactory(false); |
| return dbf.newDocumentBuilder().newDocument(); |
| } catch (ParserConfigurationException pce) { |
| // can never happen with the system-default configuration |
| } |
| return null; |
| } |
| |
| /** |
| * Returns a DocumentBuilderFactory instance. |
| * |
| * @param overrideDefaultParser a flag indicating whether the system-default |
| * implementation may be overridden. If the system property of the |
| * DOM factory ID is set, override is always allowed. |
| * |
| * @return a DocumentBuilderFactory instance. |
| */ |
| public static DocumentBuilderFactory getDOMFactory(boolean overrideDefaultParser) { |
| boolean override = overrideDefaultParser; |
| String spDOMFactory = SecuritySupport.getJAXPSystemProperty(DOM_FACTORY_ID); |
| |
| if (spDOMFactory != null && System.getSecurityManager() == null) { |
| override = true; |
| } |
| DocumentBuilderFactory dbf |
| = !override |
| ? new DocumentBuilderFactoryImpl() |
| : DocumentBuilderFactory.newInstance(); |
| dbf.setNamespaceAware(true); |
| // false is the default setting. This step here is for compatibility |
| dbf.setValidating(false); |
| return dbf; |
| } |
| |
| /** |
| * Returns a SAXParserFactory instance. |
| * |
| * @param overrideDefaultParser a flag indicating whether the system-default |
| * implementation may be overridden. If the system property of the |
| * DOM factory ID is set, override is always allowed. |
| * |
| * @return a SAXParserFactory instance. |
| */ |
| public static SAXParserFactory getSAXFactory(boolean overrideDefaultParser) { |
| boolean override = overrideDefaultParser; |
| String spSAXFactory = SecuritySupport.getJAXPSystemProperty(SAX_FACTORY_ID); |
| if (spSAXFactory != null && System.getSecurityManager() == null) { |
| override = true; |
| } |
| |
| SAXParserFactory factory |
| = !override |
| ? new SAXParserFactoryImpl() |
| : SAXParserFactory.newInstance(); |
| factory.setNamespaceAware(true); |
| return factory; |
| } |
| |
| public static SAXTransformerFactory getSAXTransformFactory(boolean overrideDefaultParser) { |
| SAXTransformerFactory tf = overrideDefaultParser |
| ? (SAXTransformerFactory) SAXTransformerFactory.newInstance() |
| : (SAXTransformerFactory) new TransformerFactoryImpl(); |
| try { |
| tf.setFeature(OVERRIDE_PARSER, overrideDefaultParser); |
| } catch (TransformerConfigurationException ex) { |
| // ignore since it'd never happen with the JDK impl. |
| } |
| return tf; |
| } |
| |
| private static XMLReader getXMLReaderWSAXFactory(boolean overrideDefaultParser) { |
| SAXParserFactory saxFactory = getSAXFactory(overrideDefaultParser); |
| try { |
| return saxFactory.newSAXParser().getXMLReader(); |
| } catch (ParserConfigurationException | SAXException ex) { |
| return getXMLReaderWXMLReaderFactory(); |
| } |
| } |
| |
| @SuppressWarnings("deprecation") |
| private static XMLReader getXMLReaderWXMLReaderFactory() { |
| try { |
| return org.xml.sax.helpers.XMLReaderFactory.createXMLReader(); |
| } catch (SAXException ex1) { |
| } |
| return null; |
| } |
| } |
