/*
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*
* 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 2001-2004 (C) Intalio, Inc. All Rights Reserved.
*
* $Id$ Date Author
* Changes 04/06/2001 Arnaud Blandin Created 09/09/2004 Keith Visco Modified for
* SAX 2 support
*/
package org.exolab.castor.xml.util;
import java.util.HashSet;
import java.util.Set;
import org.exolab.castor.types.AnyNode;
import org.exolab.castor.xml.Namespaces;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
/**
* A class for converting an AnyNode to SAX events.
*
* @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
* @author <a href="mailto:blandin@intalio.com">Arnaud Blandin</a>
*
* @version $Revision$ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $
*/
public class AnyNode2SAX2 {
/** The AnyNode we are firing events for. */
private AnyNode _node;
/** The Content Handler. */
private ContentHandler _handler;
/** The stack to store the elements. */
private Set<AnyNode> _elements;
/** The namespace context. */
private Namespaces _context;
/**
* No-arg constructor.
*/
public AnyNode2SAX2() {
this(null, null);
}
/**
* Creates a AnyNode2SAX for the given node.
* @param node the AnyNode to create AnyNode2SAX2 for.
*/
public AnyNode2SAX2(final AnyNode node) {
this(node, null);
}
/**
* Creates a AnyNode2SAX2 for the given node and the namespace context.
* @param node the AnyNode to create AnyNode2SAX for.
* @param context a namespace context
*/
public AnyNode2SAX2(final AnyNode node, final Namespaces context) {
_elements = new HashSet<AnyNode>();
_node = node;
_context = (context == null) ? new Namespaces() : context;
}
/**
* Set the ContentHandler to send events to.
*
* @param handler the document handler to set
*/
public void setContentHandler(final ContentHandler handler) {
if (handler == null) {
throw new IllegalArgumentException(
"AnyNode2SAX2#setContentHandler 'null' value for handler");
}
_handler = handler;
}
public static void fireEvents(final AnyNode node, final ContentHandler handler)
throws SAXException {
fireEvents(node, handler, null);
}
public static void fireEvents(final AnyNode node, final ContentHandler handler,
final Namespaces context) throws SAXException {
AnyNode2SAX2 eventProducer = new AnyNode2SAX2(node, context);
eventProducer.setContentHandler(handler);
// inject a namespace declaration for the AnyNode element
if (node != null
&& context != null
&& node.getNamespacePrefix() != null
&& context.getNamespaceURI(node.getNamespacePrefix()) == null) {
handler.startPrefixMapping(node.getNamespacePrefix(), node.getNamespaceURI());
}
eventProducer.start();
}
public void start() throws org.xml.sax.SAXException {
if (_node == null || _handler == null) {
return;
}
processAnyNode(_node, _handler);
}
private void processAnyNode(final AnyNode node, final ContentHandler handler)
throws SAXException {
if (_node == null || _handler == null) {
throw new IllegalArgumentException();
}
// -- so we don't potentially get into an endlessloop
if (!_elements.add(node)) {
return;
}
if (node.getNodeType() == AnyNode.ELEMENT) {
// -- node local name
String name = node.getLocalName();
// -- retrieve the namespaces declaration and handle them
AnyNode tempNode = node.getFirstNamespace();
String prefix = null;
while (tempNode != null) {
prefix = tempNode.getNamespacePrefix();
if (prefix == null) {
prefix = "";
}
String value = tempNode.getNamespaceURI();
if (value == null) {
value = "";
}
handler.startPrefixMapping(prefix, value);
if (value != null && value.length() > 0) {
_context.addNamespace(prefix, value);
}
tempNode = tempNode.getNextSibling();
}// namespaceNode
// -- retrieve the attributes and handle them
AttributesImpl atts = new AttributesImpl();
tempNode = node.getFirstAttribute();
String xmlName = null;
String value = null;
String attUri = null;
String attPrefix = null;
while (tempNode != null) {
xmlName = tempNode.getLocalName();
String localName = xmlName;
// --retrieve a prefix?
attUri = tempNode.getNamespaceURI();
if (attUri != null) {
attPrefix = _context.getNamespacePrefix(attUri);
} else {
attUri = "";
}
if (attPrefix != null && attPrefix.length() > 0) {
xmlName = attPrefix + ':' + xmlName;
}
value = tempNode.getStringValue();
atts.addAttribute(attUri, localName, xmlName, "CDATA", value);
tempNode = tempNode.getNextSibling();
}// attributes
// -- namespace management
// _context = _context.createNamespaces();
String nsPrefix = node.getNamespacePrefix();
String nsURI = node.getNamespaceURI();
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);
}
} else {
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(nsURI, name, qName, atts);
} catch (SAXException sx) {
throw new SAXException(sx);
}
// -- handle child&daughter elements
tempNode = node.getFirstChild();
while (tempNode != null) {
_context = _context.createNamespaces();
processAnyNode(tempNode, handler);
tempNode = tempNode.getNextSibling();
}
// -- finish element
try {
handler.endElement(nsURI, name, qName);
_context = _context.getParent();
// -- retrieve the namespaces declaration and handle them
tempNode = node.getFirstNamespace();
while (tempNode != null) {
prefix = tempNode.getNamespacePrefix();
if (prefix == null) {
prefix = "";
}
handler.endPrefixMapping(prefix);
tempNode = tempNode.getNextSibling();
} // namespaceNode
} catch (org.xml.sax.SAXException sx) {
throw new SAXException(sx);
}
} else {
// ELEMENTS
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);
}
}
}
}
}
}