/*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 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 name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``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
* INTALIO, INC. 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.
*
* Copyright 2004 (C) Intalio, Inc. All Rights Reserved.
*
*
*/
package org.exolab.castor.xml.util;
import org.exolab.castor.xml.Namespaces;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.DocumentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributeListImpl;
/**
* A ContentHandler implementation that wraps a DocumentHandler. This
* ContentHandler was written for the Marshaller and expects that QNames
* are non-null in calls to startElement and endElement methods as well
* as inside the Attributes list.
*
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @version $Revision$ $Date: 2004-09-10 12:15:10 -0600 (Fri, 10 Sep 2004) $
*/
public class DocumentHandlerAdapter implements ContentHandler {
private static final String CDATA = "CDATA";
private DocumentHandler _handler = null;
private Namespaces _namespaces = null;
private boolean _createNamespaceScope = true;
/**
* Creates a new DocumentHandlerAdapter
*
* @param handler the DocumentHandler to wrap (non-null).
*/
public DocumentHandlerAdapter(DocumentHandler handler) {
if (handler == null) {
throw new IllegalArgumentException("The argument 'handler' must not be null.");
}
_handler = handler;
_namespaces = new Namespaces();
}
/**
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
*/
public void characters(char[] chars, int start, int length)
throws SAXException
{
_handler.characters(chars, start, length);
}
/**
* @see org.xml.sax.ContentHandler#endDocument()
*/
public void endDocument()
throws SAXException
{
_handler.endDocument();
}
/**
* @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String,
* java.lang.String)
*/
public void endElement(String uri, String localName, String qName)
throws SAXException
{
_handler.endElement(qName);
if (_namespaces.getParent() != null) {
_namespaces = _namespaces.getParent();
}
}
/**
* @see org.xml.sax.ContentHandler#endPrefixMapping(java.lang.String)
*/
public void endPrefixMapping(String prefix)
throws SAXException
{
//-- do nothing here, this is handled in endElement
//-- by simply removing the current namespace scope
}
/**
* @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int)
*/
public void ignorableWhitespace(char[] chars, int start, int length)
throws SAXException
{
_handler.ignorableWhitespace(chars, start, length);
}
/**
* @see org.xml.sax.ContentHandler#processingInstruction(java.lang.String, java.lang.String)
*/
public void processingInstruction(String target, String data)
throws SAXException
{
_handler.processingInstruction(target, data);
}
/**
* @see org.xml.sax.ContentHandler#setDocumentLocator(org.xml.sax.Locator)
*/
public void setDocumentLocator(Locator locator)
{
_handler.setDocumentLocator(locator);
}
/**
* @see org.xml.sax.ContentHandler#skippedEntity(java.lang.String)
*/
public void skippedEntity(String arg0)
throws SAXException
{
//-- do nothing
}
/**
* @see org.xml.sax.ContentHandler#startDocument()
*/
public void startDocument()
throws SAXException
{
_handler.startDocument();
}
/**
* @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String uri, String localName, String qName, Attributes atts)
throws SAXException
{
AttributeListImpl attList = new AttributeListImpl();
//-- Create a new namespace scope if necessary and
//-- make sure the flag is reset to true
if (_createNamespaceScope) {
//-- no current namespaces, but we create a new scope
//-- to make things easier in the endElement method
_namespaces = _namespaces.createNamespaces();
}
else {
_createNamespaceScope = true;
_namespaces.declareAsAttributes(attList, true);
}
//-- copy Attributes to AttributeList
for (int i = 0; i < atts.getLength(); i++) {
attList.addAttribute(atts.getQName(i), CDATA, atts.getValue(i));
}
_handler.startElement(qName, attList);
}
/**
* @see org.xml.sax.ContentHandler#startPrefixMapping(java.lang.String, java.lang.String)
*/
public void startPrefixMapping(String prefix, String uri)
throws SAXException
{
if (_createNamespaceScope) {
_namespaces = _namespaces.createNamespaces();
_createNamespaceScope = false;
}
_namespaces.addNamespace(prefix, uri);
}
}