groovy.xml.slurpersupport.NodeParents Maven / Gradle / Ivy
/*
* 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 groovy.xml.slurpersupport;
import java.util.Iterator;
import java.util.Map;
/**
* Lazy evaluated representation of parent nodes without duplicates
*/
public class NodeParents extends NodeChildren {
/**
* @param parent the GPathResult prior to the application of the expression creating this GPathResult
* @param namespaceTagHints the known tag to namespace mappings
*/
public NodeParents(final GPathResult parent, final Map namespaceTagHints) {
super(parent, parent.parent.name, namespaceTagHints);
}
@Override
public Iterator nodeIterator() {
return new NodeIterator(this.parent.nodeIterator()) {
private Node prev = null;
@Override
protected Object getNextNode(final Iterator iter) {
while (iter.hasNext()) {
final Node node = ((Node)iter.next()).parent();
if (node != null && node != prev) {
prev = node;
return node;
}
}
return null;
}
};
}
}