/*
* 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.axiom.om.impl.common;
import org.apache.axiom.om.OMContainer;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.OMSerializable;
/**
* Iterator that iterates over all descendants in document order.
*/
public class OMDescendantsIterator extends OMAbstractIterator {
private int level;
public OMDescendantsIterator(OMContainer container, boolean includeSelf) {
super(includeSelf ? (OMSerializable)container : (OMSerializable)container.getFirstOMChild());
level = includeSelf ? 0 : 1;
}
protected OMSerializable getNextNode(OMSerializable currentNode) {
if (currentNode instanceof OMContainer) {
OMNode firstChild = ((OMContainer)currentNode).getFirstOMChild();
if (firstChild != null) {
level++;
return firstChild;
}
}
OMSerializable node = currentNode;
while (true) {
if (level == 0) {
return null;
}
OMNode nextSibling = ((OMNode)node).getNextOMSibling();
if (nextSibling != null) {
return nextSibling;
} else {
node = ((OMNode)node).getParent();
level--;
}
}
}
}