/*
* 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.commons.jxpath.ri.axes;
import org.apache.commons.jxpath.NodeSet;
import org.apache.commons.jxpath.ri.EvalContext;
import org.apache.commons.jxpath.ri.model.NodePointer;
/**
* A simple context that is based on a {@link NodeSet}.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class NodeSetContext extends EvalContext {
private boolean startedSet = false;
private NodeSet nodeSet;
/**
* Create a new NodeSetContext.
* @param parentContext parent context
* @param nodeSet associated NodeSet
*/
public NodeSetContext(EvalContext parentContext, NodeSet nodeSet) {
super(parentContext);
this.nodeSet = nodeSet;
}
public NodeSet getNodeSet() {
return nodeSet;
}
public NodePointer getCurrentNodePointer() {
if (position == 0 && !setPosition(1)) {
return null;
}
return (NodePointer) nodeSet.getPointers().get(position - 1);
}
public boolean setPosition(int position) {
super.setPosition(position);
return position >= 1 && position <= nodeSet.getPointers().size();
}
public boolean nextSet() {
if (startedSet) {
return false;
}
startedSet = true;
return true;
}
public boolean nextNode() {
return setPosition(position + 1);
}
}
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