sylvain 2003/09/09 07:23:08
Added: src/java/org/apache/cocoon/util/jxpath DOMFactory.java
Log:
JXPath factory to create DOM elements as needed.
Allows Woody binding to work with incomplete XML documents.
Revision Changes Path
1.1
cocoon-2.1/src/java/org/apache/cocoon/util/jxpath/DOMFactory.java
Index: DOMFactory.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
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 end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
[EMAIL PROTECTED]
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``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 THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, 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.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <[EMAIL PROTECTED]>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.util.jxpath;
import org.apache.commons.jxpath.AbstractFactory;
import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.Pointer;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* A <a href="http://jakarta.apache.org/commons/jxpath";>JXPath</a>
<code>AbstractFactory</code>
* that creates DOM elements.
*
* @author <a href="http://www.apache.org/~sylvain/";>Sylvain Wallez</a>
* @version $Id: DOMFactory.java,v 1.1 2003/09/09 14:23:08 sylvain Exp $
*/
public class DOMFactory extends AbstractFactory {
/**
* Return <b>false</b> if this factory cannot create the requested object.
*/
public boolean createObject(
JXPathContext context,
Pointer pointer,
Object parent,
String name,
int index)
{
//FIXME: JXPath automatically creates attributes if the element
already exists,
//but does not call this method if the element does not exit
addDOMElement((Element) parent, index, name);
return true;
}
private void addDOMElement(Element parent, int index, String tag) {
int pos = tag.indexOf(':');
String prefix = null;
if (pos != -1) {
prefix = tag.substring(0, pos);
}
String uri = getNamespaceURI(parent, prefix);
//System.out.println("Found namespace '" + uri + "' for tag " + tag);
Node child = parent.getFirstChild();
int count = 0;
while (child != null) {
if (child.getNodeName().equals(tag)) {
count++;
}
child = child.getNextSibling();
}
// Keep inserting new elements until we have index + 1 of them
while (count <= index) {
Node newElement = parent.getOwnerDocument().createElementNS(uri,
tag);
parent.appendChild(newElement);
count++;
}
}
public String getNamespaceURI(Element element, String prefix) {
Node tmp = element;
String nsAttr = prefix == null ? "xmlns" : "xmlns:" + prefix;
while (tmp != null && tmp.getNodeType() == Node.ELEMENT_NODE) {
element = (Element)tmp;
// First test element prefixes
if (prefix == null) {
if (element.getPrefix() == null) {
return element.getNamespaceURI();
}
} else if(prefix.equals(element.getPrefix())) {
return element.getNamespaceURI();
}
String namespace = ((Element)tmp).getAttribute(nsAttr);
if (namespace != null) {
//System.out.println("Found attribute '" + nsAttr + "'='" +
namespace + "' on element " + tmp.getNodeName());
return namespace;
}
tmp = tmp.getParentNode();
}
return null;
}
public boolean declareVariable(JXPathContext context, String name) {
return false;
}
}
