/*
* Copyright (C) 2015 Red Hat, Inc. and/or its affiliates.
*
* 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.jboss.errai.ui.shared;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* @author edewit@redhat.com
* @author Max Barkley <mbarkley@redhat.com>
*/
public class DomVisit {
/**
* Called to traverse and visit the tree of {@link org.w3c.dom.Element}s.
* @param element the root of the tree to traverse and visit
* @param visitor the visitor to be called on each of the nodes.
*/
public static void visit(Element element, DomVisitor visitor) {
if (!visitor.visit(element))
return;
NodeList childNodes = element.getChildNodes();
for (int idx = 0; idx < childNodes.getLength(); idx++) {
Node childNode = childNodes.item(idx);
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
visit((Element) childNode, visitor);
}
}
}
public static void revisit(Element element, DomRevisitor visitor) {
if (visitor.visit(element)) {
NodeList childNodes = element.getChildNodes();
for (int idx = 0; idx < childNodes.getLength(); idx++) {
Node childNode = childNodes.item(idx);
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
revisit((Element) childNode, visitor);
}
}
}
visitor.afterVisit(element);
}
}