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From-SVN: r102074
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Tom Tromey
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346
libjava/classpath/javax/xml/parsers/DocumentBuilderFactory.java
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346
libjava/classpath/javax/xml/parsers/DocumentBuilderFactory.java
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/* DocumentBuilderFactory.java --
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Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.xml.parsers;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.IOException;
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import java.util.Properties;
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import javax.xml.validation.Schema;
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/**
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* Factory for obtaining document builders.
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* Instances of this class are <em>not</em> guaranteed to be thread safe.
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*
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* @author (a href='mailto:dog@gnu.org'>Chris Burdess</a)
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*/
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public abstract class DocumentBuilderFactory
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{
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private boolean namespaceAware;
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private boolean validating;
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private boolean ignoringElementContentWhitespace;
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private boolean expandEntityReferences = true;
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private boolean ignoringComments;
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private boolean coalescing;
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private Schema schema;
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private boolean xIncludeAware;
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protected DocumentBuilderFactory()
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{
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}
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/**
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* Creates a new factory instance.
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* The implementation class to load is the first found in the following
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* locations:
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* <ol>
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* <li>the <code>javax.xml.parsers.DocumentBuilderFactory</code> system
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* property</li>
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* <li>the above named property value in the
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* <code><i>$JAVA_HOME</i>/lib/jaxp.properties</code> file</li>
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* <li>the class name specified in the
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* <code>META-INF/services/javax.xml.parsers.DocumentBuilderFactory</code>
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* system resource</li>
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* <li>the default factory class</li>
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* </ol>
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*/
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public static DocumentBuilderFactory newInstance()
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{
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ClassLoader loader = Thread.currentThread().getContextClassLoader();
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if (loader == null)
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{
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loader = DocumentBuilderFactory.class.getClassLoader();
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}
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String className = null;
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int count = 0;
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do
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{
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className = getFactoryClassName(loader, count++);
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if (className != null)
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{
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try
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{
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Class t = (loader != null) ? loader.loadClass(className) :
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Class.forName(className);
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return (DocumentBuilderFactory) t.newInstance();
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}
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catch (ClassNotFoundException e)
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{
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className = null;
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}
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catch (Exception e)
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{
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throw new FactoryConfigurationError(e,
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"error instantiating class " + className);
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}
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}
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}
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while (className == null && count < 3);
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return new gnu.xml.dom.DomDocumentBuilderFactory();
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}
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private static String getFactoryClassName(ClassLoader loader, int attempt)
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{
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final String propertyName = "javax.xml.parsers.DocumentBuilderFactory";
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switch (attempt)
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{
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case 0:
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return System.getProperty(propertyName);
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case 1:
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try
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{
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File file = new File(System.getProperty("java.home"));
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file = new File(file, "lib");
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file = new File(file, "jaxp.properties");
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InputStream in = new FileInputStream(file);
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Properties props = new Properties();
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props.load(in);
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in.close();
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return props.getProperty(propertyName);
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}
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catch (IOException e)
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{
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return null;
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}
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case 2:
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try
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{
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String serviceKey = "/META-INF/services/" + propertyName;
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InputStream in = (loader != null) ?
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loader.getResourceAsStream(serviceKey) :
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DocumentBuilderFactory.class.getResourceAsStream(serviceKey);
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if (in != null)
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{
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BufferedReader r =
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new BufferedReader(new InputStreamReader(in));
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String ret = r.readLine();
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r.close();
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return ret;
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}
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}
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catch (IOException e)
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{
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}
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return null;
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default:
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return null;
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}
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}
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/**
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* Creates a new document builder instance using the currently specified
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* factory configuration.
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* @exception ParserConfigurationException if the specified configuration
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* is not supported
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*/
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public abstract DocumentBuilder newDocumentBuilder()
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throws ParserConfigurationException;
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/**
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* Sets whether document builders obtained from this factory will be XML
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* Namespace aware.
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*/
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public void setNamespaceAware(boolean awareness)
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{
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namespaceAware = awareness;
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}
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/**
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* Sets whether document builders obtained from this factory will validate
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* their input.
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*/
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public void setValidating(boolean validating)
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{
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this.validating = validating;
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}
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/**
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* Sets whether document builders obtained from this factory will
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* eliminate whitespace within elements that have an element-only content
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* model.
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*/
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public void setIgnoringElementContentWhitespace(boolean whitespace)
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{
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ignoringElementContentWhitespace = whitespace;
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}
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/**
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* Sets whether document builders obtained from this factory will expand
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* entity reference nodes.
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*/
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public void setExpandEntityReferences(boolean expandEntityRef)
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{
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expandEntityReferences = expandEntityRef;
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}
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/**
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* Sets whether document builders obtained from this factory will discard
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* comment nodes.
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*/
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public void setIgnoringComments(boolean ignoreComments)
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{
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ignoringComments = ignoreComments;
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}
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/**
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* Sets whether document builders obtained from this factory will convert
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* CDATA sections to text nodes and normalize adjacent text nodes into a
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* single text node.
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*/
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public void setCoalescing(boolean coalescing)
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{
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this.coalescing = coalescing;
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}
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/**
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* Indicates whether document builders obtained from this factory will be
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* XML Namespace aware.
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*/
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public boolean isNamespaceAware()
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{
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return namespaceAware;
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}
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/**
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* Indicates whether document builders obtained from this factory will
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* validate their input.
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*/
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public boolean isValidating()
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{
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return validating;
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}
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/**
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* Indicates whether document builders obtained from this factory will
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* eliminate whitespace within elements that have an element-only content
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* model.
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*/
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public boolean isIgnoringElementContentWhitespace()
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{
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return ignoringElementContentWhitespace;
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}
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/**
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* Indicates whether document builders obtained from this factory will
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* expand entity reference nodes.
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*/
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public boolean isExpandEntityReferences()
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{
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return expandEntityReferences;
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}
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/**
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* Indicates whether document builders obtained from this factory will
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* discard comment nodes.
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*/
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public boolean isIgnoringComments()
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{
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return ignoringComments;
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}
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/**
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* Indicates whether document builders obtained from this factory will
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* convert CDATA sections to text nodes and normalize adjacent text nodes
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* into a single text node.
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*/
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public boolean isCoalescing()
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{
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return coalescing;
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}
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/**
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* Set the named attribute on the underlying implementation.
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* @param name the name of the attribute
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* @param value the new value
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* @exception IllegalArgumentException if the attribute is not recognized
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*/
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public abstract void setAttribute(String name, Object value)
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throws IllegalArgumentException;
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/**
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* Retrieves the named attribute value from the underlying implementation.
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* @param name the name of the attribute
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* @exception IllegalArgumentException if the attribute is not recognized
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*/
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public abstract Object getAttribute(String name)
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throws IllegalArgumentException;
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// -- JAXP 1.3 methods --
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/**
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* Returns the schema.
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* @see #setSchema
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*/
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public Schema getSchema()
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{
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return schema;
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}
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/**
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* Sets the schema.
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* @see #getSchema
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*/
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public void setSchema(Schema schema)
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{
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this.schema = schema;
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}
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/**
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* Indicates whether parsers obtained from this factory will be XInclude
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* aware.
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* @since 1.3
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*/
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public boolean isXIncludeAware()
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{
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return xIncludeAware;
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}
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/**
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* Sets whether parsers obtained from this factory will be XInclude aware.
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* @since 1.3
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*/
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public void setXIncludeAware(boolean state)
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{
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xIncludeAware = state;
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}
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}
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