/**
* 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 2001 (C) Intalio, Inc. All Rights Reserved.
*
* $Id: AnyNode2SAX.java,v 1.1.1.1 2003/03/03 07:09:46 kvisco Exp $
* Date Author Changes
* 04/06/2001 Arnaud Blandin Created
*/
package org.exolab.castor.xml.util;
import org.xml.sax.DocumentHandler;
import org.exolab.castor.xml.EventProducer;
import org.exolab.castor.types.AnyNode;
import org.exolab.castor.util.Stack;
import org.exolab.castor.xml.Namespaces;
import org.xml.sax.helpers.AttributeListImpl;
import org.xml.sax.SAXException;
/**
* A class for converting an AnyNode to SAX events
* @author <a href="mailto:blandin@intalio.com">Arnaud Blandin</a>
* @version $Revision: 1.1.1.1 $ $Date: 2003/03/03 07:09:46 $
*/
public class AnyNode2SAX implements EventProducer {
/**
* The AnyNode we are firing events for
*/
private AnyNode _node;
/**
* The Document Handler
*/
private DocumentHandler _handler;
/**
* The stack to store the elements
*/
private Stack _elements;
/**
* The namespace context
*/
private Namespaces _context;
/**
* The namespace declaration String
*/
private static final String XMLNS_PREFIX = "xmlns";
public AnyNode2SAX() {
_elements = new Stack();
}
/**
* Creates a AnyNode2SAX for the given node.
*/
public AnyNode2SAX(AnyNode node) {
this();
_node = node;
_context = new Namespaces();
}
/**
* Creates a AnyNode2SAX for the given node and the namespace context.
*/
public AnyNode2SAX(AnyNode node, Namespaces context) {
this();
_node = node;
if (context == null)
_context = new Namespaces();
else _context = context;
}
/**
* Set the Document Handler
* @param handler the document handler to set
*/
public void setDocumentHandler(DocumentHandler handler) {
if (handler == null)
throw new IllegalArgumentException("AnyNode2SAX#setDocumentHandler 'null' value for handler");
_handler = handler;
}
public static void fireEvents(AnyNode node, DocumentHandler handler)
throws SAXException
{
fireEvents(node, handler, null);
}
public static void fireEvents(AnyNode node, DocumentHandler handler, Namespaces context)
throws SAXException
{
AnyNode2SAX eventProducer = new AnyNode2SAX(node, context);
eventProducer.setDocumentHandler(handler);
eventProducer.start();
}
public void start() throws org.xml.sax.SAXException {
if ( (_node == null) || (_handler == null) )
return;
else processAnyNode(_node, _handler);
}
private void processAnyNode(AnyNode node, DocumentHandler handler)
throws SAXException
{
if ( (node == null) || (handler == null) ) {
throw new IllegalArgumentException();
}
//-- add object to stack so we don't potentially get into
//-- an endlessloop
if (_elements.search(node) >= 0) return;
else _elements.push(node);
if (node.getNodeType() == AnyNode.ELEMENT) {
//the first sibling node of the current one
AnyNode siblingNode = node.getNextSibling();
String name = node.getLocalName();
//-- retrieve the attributes and handle them
AttributeListImpl atts = new AttributeListImpl();
AnyNode tempNode = node.getFirstAttribute();
String xmlName = null;
String value = null;
while (tempNode != null) {
xmlName = tempNode.getLocalName();
value = tempNode.getStringValue();
atts.addAttribute(xmlName, null, value);
tempNode = tempNode.getNextSibling();
}//attributes
//-- namespace management
_context = _context.createNamespaces();
String nsPrefix = node.getNamespacePrefix();
String nsURI = node.getNamespaceURI();
//-- retrieve the namespaces declaration and handle them
tempNode = node.getFirstNamespace();
String prefix = null;
while (tempNode != null) {
prefix = tempNode.getNamespacePrefix();
value = tempNode.getNamespaceURI();
if (value != null && value.length() >0)
_context.addNamespace(prefix, value);
tempNode = tempNode.getNextSibling();
}//namespaceNode
String qName = null;
//maybe the namespace is already bound to a prefix in the
//namespace context
if (nsURI != null && nsURI.length() > 0) {
String tempPrefix = _context.getNamespacePrefix(nsURI);
if (tempPrefix != null)
nsPrefix = tempPrefix;
else {
_context.addNamespace(nsPrefix, nsURI);
}
}
if (nsPrefix != null) {
int len = nsPrefix.length();
if (len > 0) {
StringBuffer sb = new StringBuffer(len+name.length()+1);
sb.append(nsPrefix);
sb.append(':');
sb.append(name);
qName = sb.toString();
} else qName = name;
} else {
qName = name;
}
try {
_context.declareAsAttributes(atts,true);
handler.startElement(qName, atts);
} catch (SAXException sx) {
throw new SAXException(sx);
}
//-- handle child&daughter elements
tempNode = node.getFirstChild();
while (tempNode != null) {
processAnyNode(tempNode, handler);
tempNode = tempNode.getNextSibling();
}
//-- finish element
try {
handler.endElement(qName);
_context = _context.getParent();
} catch(org.xml.sax.SAXException sx) {
throw new SAXException(sx);
}
}//ELEMENTS
else {
if (node.getNodeType() == AnyNode.TEXT) {
String value = node.getStringValue();
if ( (value != null) && (value.length() >0) ) {
char[] chars = value.toCharArray();
try {
handler.characters(chars, 0, chars.length);
} catch(org.xml.sax.SAXException sx) {
throw new SAXException(sx);
}
}
}
}
}
private void processTextNode(AnyNode node, DocumentHandler handler)
throws SAXException
{
if (node.getNodeType() != AnyNode.TEXT) {
String err = "This node can not be handle by processTextNode.";
throw new IllegalArgumentException(err);
}
String value = node.getStringValue();
if ( (value != null) && (value.length() >0) ) {
char[] chars = value.toCharArray();
try {
handler.characters(chars, 0, chars.length);
} catch(org.xml.sax.SAXException sx) {
throw new SAXException(sx);
}
}
}//processTextNode
}