/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.xb.binding.parser.sax;
import org.jboss.xb.binding.JBossXBException;
import org.jboss.xb.binding.Unmarshaller;
import org.jboss.xb.binding.parser.JBossXBParser;
import org.jboss.util.xml.JBossEntityResolver;
import org.jboss.logging.Logger;
import org.xml.sax.XMLReader;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXParseException;
import org.xml.sax.SAXException;
import org.xml.sax.Locator;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.EntityResolver;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import java.io.Reader;
import java.io.InputStream;
/**
* @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
* @version <tt>$Revision: 1455 $</tt>
*/
public class SaxJBossXBParser
implements JBossXBParser
{
private static final Logger log = Logger.getLogger(SaxJBossXBParser.class);
private final SAXParser parser;
private JBossXBParser.ContentHandler contentHandler;
public SaxJBossXBParser()
throws JBossXBException
{
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
saxFactory.setValidating(true);
saxFactory.setNamespaceAware(true);
try
{
parser = saxFactory.newSAXParser();
}
catch(Exception e)
{
throw new JBossXBException("Failed to create a new SAX parser", e);
}
XMLReader reader = null;
try
{
reader = parser.getXMLReader();
}
catch(SAXException e)
{
throw new JBossXBException("Failed to get parser's XMLReader", e);
}
reader.setContentHandler(new DelegatingContentHandler());
reader.setErrorHandler(new MetaDataErrorHandler());
reader.setEntityResolver(new JBossEntityResolver());
setFeature(Unmarshaller.VALIDATION, true);
setFeature(Unmarshaller.SCHEMA_VALIDATION, true);
setFeature(Unmarshaller.SCHEMA_FULL_CHECKING, true);
setFeature(Unmarshaller.DYNAMIC_VALIDATION, true);
setFeature(Unmarshaller.NAMESPACES, true);
}
// JBossXBParser implementation
public void setEntityResolver(EntityResolver entityResolver)
throws JBossXBException
{
try
{
parser.getXMLReader().setEntityResolver(entityResolver);
}
catch(SAXException e)
{
throw new JBossXBException("Failed to set EntityResolver", e);
}
}
public void setProperty(String name, Object value) throws JBossXBException
{
try
{
parser.getXMLReader().setProperty(name, value);
}
catch(SAXException e)
{
throw new JBossXBException("Failed to get parser's XMLReader", e);
}
}
public void setFeature(String name, boolean value) throws JBossXBException
{
try
{
parser.getXMLReader().setFeature(name, value);
}
catch(SAXException e)
{
throw new JBossXBException("Failed to get parser's XMLReader", e);
}
}
public void parse(String systemId, ContentHandler handler) throws JBossXBException
{
this.contentHandler = handler;
try
{
parser.getXMLReader().parse(systemId);
}
catch(Exception e)
{
throw new JBossXBException("Failed to parse source.", e);
}
}
public void parse(InputStream is, ContentHandler handler) throws JBossXBException
{
this.contentHandler = handler;
try
{
parser.getXMLReader().parse(new InputSource(is));
}
catch(Exception e)
{
throw new JBossXBException("Failed to parse source.", e);
}
}
public void parse(Reader reader, ContentHandler handler) throws JBossXBException
{
this.contentHandler = handler;
try
{
parser.getXMLReader().parse(new InputSource(reader));
}
catch(Exception e)
{
throw new JBossXBException("Failed to parse source.", e);
}
}
// Inner
private final class DelegatingContentHandler
implements org.xml.sax.ContentHandler
{
public void endDocument()
{
}
public void startDocument()
{
}
public void characters(char ch[], int start, int length)
{
// todo look at this later
// do not notify content handler if these are just whitespaces
int i = start;
while(i < start + length)
{
if(!Character.isWhitespace(ch[i++]))
{
contentHandler.characters(ch, start, length);
break;
}
}
}
public void ignorableWhitespace(char ch[], int start, int length)
{
}
public void endPrefixMapping(String prefix)
{
contentHandler.endPrefixMapping(prefix);
}
public void skippedEntity(String name)
{
}
public void setDocumentLocator(Locator locator)
{
}
public void processingInstruction(String target, String data)
{
contentHandler.processingInstruction(target, data);
}
public void startPrefixMapping(String prefix, String uri)
{
contentHandler.startPrefixMapping(prefix, uri);
}
public void endElement(String namespaceURI, String localName, String qName)
{
contentHandler.endElement(namespaceURI, localName, qName);
}
public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
{
contentHandler.startElement(namespaceURI, localName, qName, atts, null);
}
}
private static final class MetaDataErrorHandler
implements ErrorHandler
{
public void warning(SAXParseException exception)
{
log.warn(formatMessage(exception));
}
public void error(SAXParseException exception)
throws SAXException
{
throw new SAXException(formatMessage(exception));
}
public void fatalError(SAXParseException exception)
throws SAXException
{
throw new SAXException(formatMessage(exception));
}
public String formatMessage(SAXParseException exception)
{
StringBuffer buffer = new StringBuffer(50);
buffer.append(exception.getMessage()).append(" @ ");
String location = exception.getPublicId();
if(location != null)
{
buffer.append(location);
}
else
{
location = exception.getSystemId();
if(location != null)
{
buffer.append(location);
}
else
{
buffer.append("*unknown*");
}
}
buffer.append('[');
buffer.append(exception.getLineNumber()).append(',');
buffer.append(exception.getColumnNumber()).append(']');
return buffer.toString();
}
}
}