/*******************************************************************************
* Copyright (c) 2010, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.criteria;
import org.eclipse.help.internal.dynamic.DocumentReader;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class CriteriaDefinitionDocumentReader extends DocumentReader {
private static final String CRITERION_ELEMENT = "criterion"; //$NON-NLS-1$
private static final String CRITERION_ID_ATTRIBUTE = "id"; //$NON-NLS-1$
@Override
protected void prepareDocument(Document document) {
prune(document.getDocumentElement());
}
private void prune(Node element) {
NodeList nodes = element.getChildNodes();
Node node = nodes.item(0);
while (node != null) {
short nodeType = node.getNodeType();
if (nodeType == Node.TEXT_NODE || nodeType == Node.COMMENT_NODE) {
Node nodeToDelete = node;
node = node.getNextSibling();
element.removeChild(nodeToDelete);
} else if (nodeType == Node.ELEMENT_NODE) {
String kind = node.getNodeName();
if (CRITERION_ELEMENT.equalsIgnoreCase(kind)) {
fixCriterionId((Element)node);
}
prune(node);
node = node.getNextSibling();
} else {
node = node.getNextSibling();
}
}
}
/*
* Cause criterion ID is case insensitive, so just change it to lower case.
*/
private void fixCriterionId(Element criterion) {
String id = criterion.getAttribute(CRITERION_ID_ATTRIBUTE);
if (id != null && id.length() > 0) {
criterion.setAttribute(CRITERION_ID_ATTRIBUTE, id.toLowerCase());
}
}
}