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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.components.xpointer;
import org.apache.cocoon.xml.dom.DOMStreamer;
import org.apache.cocoon.ResourceNotFoundException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
/**
* Implements support for shorthand XPointers (= id-based lookup). We treat them here as if they
* were a pointerpart too.
*
* <p>Note that although this is implemented here, this feature depends on the presence of a DTD,
* and a validating parser. Currently, this means its unuseable within Cocoon.
*/
public class ShorthandPart implements PointerPart {
private String shorthand;
public ShorthandPart(String shorthand) {
this.shorthand = shorthand;
}
public boolean process(XPointerContext xpointerContext) throws SAXException, ResourceNotFoundException {
Document document = xpointerContext.getDocument();
Element element = document.getElementById(shorthand);
if (element != null) {
DOMStreamer streamer = new DOMStreamer();
streamer.setConsumer(xpointerContext.getXmlConsumer());
streamer.stream(element);
return true;
} else {
if (xpointerContext.getLogger().isDebugEnabled())
xpointerContext.getLogger().debug("XPointer: found no element with id " + shorthand + " in document " + xpointerContext.getSource().getURI());
}
return false;
}
}