/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.pipeline.component.xpointer;
import java.io.IOException;
import org.apache.cocoon.pipeline.util.dom.DOMUtils;
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 final class ShorthandPart implements PointerPart {
private String shorthand;
public ShorthandPart(String shorthand) {
this.shorthand = shorthand;
}
public boolean process(XPointerContext xpointerContext) throws SAXException, IOException {
Document document = xpointerContext.getDocument();
Element element = document.getElementById(shorthand);
if (element != null) {
DOMUtils.stream(element, xpointerContext.getXmlConsumer());
return true;
} else {
if (xpointerContext.getLogger().isDebugEnabled()) {
xpointerContext.getLogger().debug(
"XPointer: found no element with id " + shorthand + " in document " + xpointerContext.getSource());
}
}
return false;
}
}