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/*
* $Id: JAXPFactory.java,v 1.1.1.1 2003-02-01 02:10:17 cbj Exp $
* Copyright (C) 2001 David Brownell
*
* This file is part of GNU JAXP, a library.
*
* GNU JAXP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU JAXP 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* As a special exception, if you link this library with other files to
* produce an executable, this library does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU General Public License.
*/
package gnu.xml.dom;
import java.io.IOException;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.DOMImplementation;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
/**
* DOM bootstrapping API, for use with JAXP.
*
* @see Consumer
*
* @author David Brownell
* @version $Date: 2003-02-01 02:10:17 $
*/
public final class JAXPFactory extends DocumentBuilderFactory
{
private static final String PROPERTY = "http://xml.org/sax/properties/";
private static final String FEATURE = "http://xml.org/sax/features/";
private SAXParserFactory pf;
/**
* Default constructor.
*/
public JAXPFactory () { }
/**
* Constructs a JAXP document builder which uses the default
* JAXP SAX2 parser and the DOM implementation in this package.
*/
public DocumentBuilder newDocumentBuilder ()
throws ParserConfigurationException
{
if (pf == null) {
// Force use of AElfred2 since not all JAXP parsers
// conform very well to the SAX2 API spec ...
pf = new gnu.xml.aelfred2.JAXPFactory ();
// pf = SAXParserFactory.newInstance ();
}
// JAXP default: false
pf.setValidating (isValidating ());
// FIXME: this namespace setup may cause errors in some
// conformant SAX2 parsers, which we CAN patch up by
// splicing a "NSFilter" stage up front ...
// JAXP default: false
pf.setNamespaceAware (isNamespaceAware ());
try {
// undo rude "namespace-prefixes=false" default
pf.setFeature (FEATURE + "namespace-prefixes", true);
return new JAXPBuilder (pf.newSAXParser ().getXMLReader (), this);
} catch (SAXException e) {
throw new ParserConfigurationException (
"can't create JAXP DocumentBuilder: " + e.getMessage ());
}
}
/** There seems to be no useful specification for attribute names */
public void setAttribute (String name, Object value)
throws IllegalArgumentException
{
throw new IllegalArgumentException (name);
}
/** There seems to be no useful specification for attribute names */
public Object getAttribute (String name)
throws IllegalArgumentException
{
throw new IllegalArgumentException (name);
}
static final class JAXPBuilder extends DocumentBuilder
implements ErrorHandler
{
private Consumer consumer;
private XMLReader producer;
private DomImpl impl;
JAXPBuilder (XMLReader parser, JAXPFactory factory)
throws ParserConfigurationException
{
impl = new DomImpl ();
// set up consumer side
try {
consumer = new Consumer ();
} catch (SAXException e) {
throw new ParserConfigurationException (e.getMessage ());
}
// JAXP defaults: true, noise nodes are good (bleech)
consumer.setHidingReferences (
factory.isExpandEntityReferences ());
consumer.setHidingComments (
factory.isIgnoringComments ());
consumer.setHidingWhitespace (
factory.isIgnoringElementContentWhitespace ());
consumer.setHidingCDATA (
factory.isCoalescing ());
// set up producer side
producer = parser;
producer.setContentHandler (consumer.getContentHandler ());
producer.setDTDHandler (consumer.getDTDHandler ());
try {
String id;
// if validating, report validity errors, and default
// to treating them as fatal
if (factory.isValidating ()) {
producer.setFeature (FEATURE + "validation",
true);
producer.setErrorHandler (this);
}
// always save prefix info, maybe do namespace processing
producer.setFeature (FEATURE + "namespace-prefixes",
true);
producer.setFeature (FEATURE + "namespaces",
factory.isNamespaceAware ());
// set important handlers
id = PROPERTY + "lexical-handler";
producer.setProperty (id, consumer.getProperty (id));
id = PROPERTY + "declaration-handler";
producer.setProperty (id, consumer.getProperty (id));
} catch (SAXException e) {
throw new ParserConfigurationException (e.getMessage ());
}
}
public Document parse (InputSource source)
throws SAXException, IOException
{
producer.parse (source);
return consumer.getDocument ();
}
public boolean isNamespaceAware ()
{
try {
return producer.getFeature (FEATURE + "namespaces");
} catch (SAXException e) {
// "can't happen"
throw new RuntimeException (e.getMessage ());
}
}
public boolean isValidating ()
{
try {
return producer.getFeature (FEATURE + "validation");
} catch (SAXException e) {
// "can't happen"
throw new RuntimeException (e.getMessage ());
}
}
public void setEntityResolver (EntityResolver resolver)
{ producer.setEntityResolver (resolver); }
public void setErrorHandler (ErrorHandler handler)
{
producer.setErrorHandler (handler);
consumer.setErrorHandler (handler);
}
public DOMImplementation getDOMImplementation ()
{ return impl; }
public Document newDocument ()
{ return new DomDocument (); }
// implementation of error handler that's used when validating
public void fatalError (SAXParseException e) throws SAXException
{ throw e; }
public void error (SAXParseException e) throws SAXException
{ throw e; }
public void warning (SAXParseException e) throws SAXException
{ /* ignore */ }
}
}
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