Initial revision
From-SVN: r102074
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Tom Tromey
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/* JAXPFactory.java --
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Copyright (C) 2001 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 gnu.xml.aelfred2;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import org.xml.sax.Parser;
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import org.xml.sax.XMLReader;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXNotRecognizedException;
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import org.xml.sax.SAXNotSupportedException;
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import org.xml.sax.helpers.XMLReaderAdapter;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.parsers.SAXParser;
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import javax.xml.parsers.SAXParserFactory;
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/**
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* Configurable factory to create an Ælfred2 JAXP parser; required
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* to bootstrap using JAXP. You should use SAX2 directly where possible,
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* rather than through JAXP, since that gives you better control.
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* This class would normally be configured as a platform default factory.
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*
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* @author David Brownell
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*/
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public final class JAXPFactory
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extends SAXParserFactory
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{
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private Hashtable flags = new Hashtable();
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/**
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* Constructs a factory which normally returns a non-validating
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* parser.
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*/
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public JAXPFactory()
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{
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}
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public SAXParser newSAXParser()
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throws ParserConfigurationException, SAXException
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{
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JaxpParser jaxp = new JaxpParser();
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Enumeration e = flags.keys();
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XMLReader parser = jaxp.getXMLReader();
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parser.setFeature(SAXDriver.FEATURE + "namespaces",
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isNamespaceAware());
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parser.setFeature(SAXDriver.FEATURE + "validation",
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isValidating());
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// that makes SAX2 feature flags trump JAXP
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while (e.hasMoreElements())
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{
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String uri = (String) e.nextElement();
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Boolean value = (Boolean) flags.get(uri);
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parser.setFeature(uri, value.booleanValue());
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}
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return jaxp;
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}
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// yes, this "feature transfer" mechanism doesn't play well
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public void setFeature(String name, boolean value)
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throws ParserConfigurationException, SAXNotRecognizedException,
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SAXNotSupportedException
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{
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try
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{
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// force "early" detection of errors where possible
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// (flags can't necessarily be set before parsing)
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new JaxpParser().getXMLReader().setFeature(name, value);
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flags.put(name, new Boolean(value));
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}
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catch (SAXNotRecognizedException e)
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{
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throw new SAXNotRecognizedException(name);
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}
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catch (SAXNotSupportedException e)
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{
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throw new SAXNotSupportedException(name);
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}
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catch (Exception e)
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{
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throw new ParserConfigurationException(e.getClass().getName()
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+ ": "
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+ e.getMessage());
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}
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}
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public boolean getFeature(String name)
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throws ParserConfigurationException, SAXNotRecognizedException,
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SAXNotSupportedException
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{
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Boolean value = (Boolean) flags.get(name);
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if (value != null)
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{
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return value.booleanValue();
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}
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else
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{
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try
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{
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return new JaxpParser().getXMLReader().getFeature(name);
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}
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catch (SAXNotRecognizedException e)
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{
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throw new SAXNotRecognizedException(name);
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}
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catch (SAXNotSupportedException e)
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{
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throw new SAXNotSupportedException(name);
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}
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catch (SAXException e)
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{
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throw new ParserConfigurationException(e.getClass().getName()
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+ ": "
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+ e.getMessage());
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}
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}
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}
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private static class JaxpParser
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extends SAXParser
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{
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private XmlReader ae2 = new XmlReader();
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private XMLReaderAdapter parser = null;
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JaxpParser()
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{
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}
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public void setProperty(String id, Object value)
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throws SAXNotRecognizedException, SAXNotSupportedException
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{
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ae2.setProperty(id, value);
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}
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public Object getProperty(String id)
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throws SAXNotRecognizedException, SAXNotSupportedException
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{
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return ae2.getProperty(id);
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}
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public Parser getParser()
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throws SAXException
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{
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if (parser == null)
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{
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parser = new XMLReaderAdapter(ae2);
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}
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return parser;
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}
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public XMLReader getXMLReader ()
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throws SAXException
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{
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return ae2;
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}
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public boolean isNamespaceAware()
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{
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try
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{
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return ae2.getFeature(SAXDriver.FEATURE + "namespaces");
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}
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catch (Exception e)
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{
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throw new Error();
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}
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}
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public boolean isValidating()
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{
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try
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{
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return ae2.getFeature(SAXDriver.FEATURE + "validation");
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}
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catch (Exception e)
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{
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throw new Error();
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}
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}
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// TODO isXIncludeAware()
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}
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}
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