| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| |
| package javax.xml.parsers; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.File; |
| import java.io.FileInputStream; |
| |
| import java.util.Properties; |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| |
| /** |
| * Defines a factory API that enables applications to obtain a |
| * parser that produces DOM object trees from XML documents. |
| * |
| * @since JAXP 1.0 |
| * @version 1.0 |
| * @author Rajiv Mordani |
| * @author James Davidson |
| */ |
| |
| public abstract class DocumentBuilderFactory { |
| /** The default property name according to the JAXP spec */ |
| private static final String defaultPropName = |
| "javax.xml.parsers.DocumentBuilderFactory"; |
| |
| private boolean validating = false; |
| private boolean namespaceAware = false; |
| private boolean whitespace = false; |
| private boolean expandEntityRef = true; |
| private boolean ignoreComments = false; |
| private boolean coalescing = false; |
| |
| protected DocumentBuilderFactory () { |
| |
| } |
| |
| /** |
| * Obtain a new instance of a |
| * <code>DocumentBuilderFactory</code>. This static method creates |
| * a new factory instance. |
| * This method uses the following ordered lookup procedure to determine |
| * the <code>DocumentBuilderFactory</code> implementation class to |
| * load: |
| * <ul> |
| * <li> |
| * Use the <code>javax.xml.parsers.DocumentBuilderFactory</code> system |
| * property. |
| * </li> |
| * <li> |
| * Use the JAVA_HOME(the parent directory where jdk is |
| * installed)/lib/jaxp.properties for a property file that contains the |
| * name of the implementation class keyed on the same value as the |
| * system property defined above. |
| * </li> |
| * <li> |
| * Use the Services API (as detailed in teh JAR specification), if |
| * available, to determine the classname. The Services API will look |
| * for a classname in the file |
| * <code>META-INF/services/javax.xml.parsers.DocumentBuilderFactory</code> |
| * in jars available to the runtime. |
| * </li> |
| * <li> |
| * Platform default <code>DocumentBuilderFactory</code> instance. |
| * </li> |
| * </ul> |
| * |
| * Once an application has obtained a reference to a |
| * <code>DocumentBuilderFactory</code> it can use the factory to |
| * configure and obtain parser instances. |
| * |
| * @exception FactoryConfigurationError if the implementation is not |
| * available or cannot be instantiated. |
| */ |
| |
| public static DocumentBuilderFactory newInstance() { |
| String factoryImplName = findFactory(defaultPropName, |
| "org.apache.crimson.jaxp.DocumentBuilderFactoryImpl"); |
| // the default can be removed after services are tested well enough |
| |
| if (factoryImplName == null) { |
| throw new FactoryConfigurationError( |
| "No default implementation found"); |
| } |
| |
| DocumentBuilderFactory factoryImpl; |
| try { |
| Class clazz = getClassForName(factoryImplName); |
| factoryImpl = (DocumentBuilderFactory)clazz.newInstance(); |
| } catch (ClassNotFoundException cnfe) { |
| throw new FactoryConfigurationError(cnfe); |
| } catch (IllegalAccessException iae) { |
| throw new FactoryConfigurationError(iae); |
| } catch (InstantiationException ie) { |
| throw new FactoryConfigurationError(ie); |
| } |
| return factoryImpl; |
| } |
| |
| /** a zero length Object array used in getClassForName() */ |
| private static final Object NO_OBJS[] = new Object[0]; |
| /** the Method object for getContextClassLoader */ |
| private static java.lang.reflect.Method getCCL; |
| |
| static { |
| try { |
| getCCL = Thread.class.getMethod("getContextClassLoader", |
| new Class[0]); |
| } catch (Exception e) { |
| getCCL = null; |
| } |
| } |
| |
| private static Class getClassForName(String className ) |
| throws ClassNotFoundException |
| { |
| if (getCCL != null) { |
| try { |
| ClassLoader contextClassLoader = |
| (ClassLoader) getCCL.invoke(Thread.currentThread(), |
| NO_OBJS); |
| return contextClassLoader.loadClass(className); |
| } catch (ClassNotFoundException cnfe) { |
| // nothing, try again with Class.forName |
| } catch (Exception e) { |
| getCCL = null; // don't try again |
| // fallback |
| } |
| } |
| |
| return Class.forName(className); |
| } |
| |
| |
| /** |
| * Creates a new instance of a DocumentBuilder using the |
| * currently configured parameters. |
| * |
| * @exception ParserConfigurationException if a DocumentBuilder |
| * cannot be created which satisfies the configuration requested |
| */ |
| |
| public abstract DocumentBuilder newDocumentBuilder() |
| throws ParserConfigurationException; |
| |
| |
| /** |
| * Specifies that the parser produced by this code will |
| * provide support for XML namespaces. By default the value of this is set |
| * to <code>false</code> |
| */ |
| |
| public void setNamespaceAware(boolean awareness) { |
| this.namespaceAware = awareness; |
| } |
| |
| /** |
| * Specifies that the parser produced by this code will |
| * validate documents as they are parsed. By default the value of this |
| * is set to <code>false</code> |
| */ |
| |
| public void setValidating(boolean validating) { |
| this.validating = validating; |
| } |
| |
| /** |
| * Specifies that the parsers created by this factory must eliminate |
| * whitespace in element content (sometimes known loosely as |
| * 'ignorable whitespace') when parsing XML documents (see XML Rec |
| * 2.10). Note that only whitespace which is directly contained within |
| * element content that has an element only content model (see XML |
| * Rec 3.2.1) will be eliminated. Due to reliance on the content model |
| * this setting requires the parser to be in validating mode. By default |
| * the value of this is set to <code>false</code> |
| */ |
| |
| public void setIgnoringElementContentWhitespace(boolean whitespace) { |
| this.whitespace = whitespace; |
| } |
| |
| /** |
| * Specifies that the parser produced by this code will |
| * expand entity reference nodes. By default the value of this is set to |
| * <code>true</code> |
| */ |
| |
| public void setExpandEntityReferences(boolean expandEntityRef) { |
| this.expandEntityRef = expandEntityRef; |
| } |
| |
| /** |
| * Specifies that the parser produced by this code will |
| * ignore comments. By default the value of this is set to <code>false |
| * </code> |
| */ |
| |
| public void setIgnoringComments(boolean ignoreComments) { |
| this.ignoreComments = ignoreComments; |
| } |
| |
| /** |
| * Specifies that the parser produced by this code will |
| * convert CDATA nodes to Text nodes and append it to the |
| * adjacent (if any) text node. By default the value of this is set to |
| * <code>false</code> |
| */ |
| |
| public void setCoalescing(boolean coalescing) { |
| this.coalescing = coalescing; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which are namespace aware. |
| */ |
| |
| public boolean isNamespaceAware() { |
| return namespaceAware; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which validate the XML content during parse. |
| */ |
| |
| public boolean isValidating() { |
| return validating; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which ignore ignorable whitespace in element content. |
| */ |
| |
| public boolean isIgnoringElementContentWhitespace() { |
| return whitespace; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which expand entity reference nodes. |
| */ |
| |
| public boolean isExpandEntityReferences() { |
| return expandEntityRef; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which ignores comments. |
| */ |
| |
| public boolean isIgnoringComments() { |
| return ignoreComments; |
| } |
| |
| /** |
| * Indicates whether or not the factory is configured to produce |
| * parsers which converts CDATA nodes to Text nodes and appends it to |
| * the adjacent (if any) Text node. |
| */ |
| |
| public boolean isCoalescing() { |
| return coalescing; |
| } |
| |
| /** |
| * Allows the user to set specific attributes on the underlying |
| * implementation. |
| * @param name The name of the attribute. |
| * @param value The value of the attribute. |
| * @exception IllegalArgumentException thrown if the underlying |
| * implementation doesn't recognize the attribute. |
| */ |
| public abstract void setAttribute(String name, Object value) |
| throws IllegalArgumentException; |
| |
| /** |
| * Allows the user to retrieve specific attributes on the underlying |
| * implementation. |
| * @param name The name of the attribute. |
| * @return value The value of the attribute. |
| * @exception IllegalArgumentException thrown if the underlying |
| * implementation doesn't recognize the attribute. |
| */ |
| public abstract Object getAttribute(String name) |
| throws IllegalArgumentException; |
| |
| // -------------------- private methods -------------------- |
| // This code is duplicated in all factories. |
| // Keep it in sync or move it to a common place |
| // Because it's small probably it's easier to keep it here |
| /** Avoid reading all the files when the findFactory |
| method is called the second time ( cache the result of |
| finding the default impl ) |
| */ |
| private static String foundFactory=null; |
| |
| /** Temp debug code - this will be removed after we test everything |
| */ |
| private static boolean debug=false; |
| static { |
| try { |
| debug=System.getProperty( "jaxp.debug" ) != null; |
| } catch(SecurityException se ) {} |
| } |
| |
| /** Private implementation method - will find the implementation |
| class in the specified order. |
| @param factoryId Name of the factory interface |
| @param xmlProperties Name of the properties file based on JAVA/lib |
| @param defaultFactory Default implementation, if nothing else is found |
| */ |
| private static String findFactory(String factoryId, |
| String defaultFactory) |
| { |
| // Use the system property first |
| try { |
| String systemProp = |
| System.getProperty( factoryId ); |
| if( systemProp!=null) { |
| if( debug ) |
| System.err.println("JAXP: found system property" + |
| systemProp ); |
| return systemProp; |
| } |
| |
| }catch (SecurityException se) { |
| } |
| |
| if( foundFactory!=null) |
| return foundFactory; |
| |
| // try to read from $java.home/lib/xml.properties |
| try { |
| String javah=System.getProperty( "java.home" ); |
| String configFile = javah + File.separator + |
| "lib" + File.separator + "jaxp.properties"; |
| File f=new File( configFile ); |
| if( f.exists()) { |
| Properties props=new Properties(); |
| props.load( new FileInputStream(f)); |
| foundFactory=props.getProperty( factoryId ); |
| if( debug ) |
| System.err.println("JAXP: found java.home property " + |
| foundFactory ); |
| if(foundFactory!=null ) |
| return foundFactory; |
| } |
| } catch(Exception ex ) { |
| if( debug ) ex.printStackTrace(); |
| } |
| |
| String serviceId = "META-INF/services/" + factoryId; |
| // try to find services in CLASSPATH |
| try { |
| ClassLoader cl=DocumentBuilderFactory.class.getClassLoader(); |
| InputStream is=null; |
| if( cl == null ) { |
| is=ClassLoader.getSystemResourceAsStream( serviceId ); |
| } else { |
| is=cl.getResourceAsStream( serviceId ); |
| } |
| |
| if( is!=null ) { |
| if( debug ) |
| System.err.println("JAXP: found " + |
| serviceId); |
| BufferedReader rd=new BufferedReader( new |
| InputStreamReader(is)); |
| |
| foundFactory=rd.readLine(); |
| rd.close(); |
| |
| if( debug ) |
| System.err.println("JAXP: loaded from services: " + |
| foundFactory ); |
| if( foundFactory != null && |
| ! "".equals( foundFactory) ) { |
| return foundFactory; |
| } |
| } |
| } catch( Exception ex ) { |
| if( debug ) ex.printStackTrace(); |
| } |
| |
| return defaultFactory; |
| } |
| |
| } |
