/**
* Copyright (c) 2011 Michael Kutschke.
* 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:
* Michael Kutschke - initial API and implementation.
*/
package org.eclipse.recommenders.internal.jayes.io.util;
import java.util.Iterator;
import org.w3c.dom.Node;
import org.w3c.dom.xpath.XPathEvaluator;
import org.w3c.dom.xpath.XPathResult;
public final class XPathUtil {
private XPathUtil() {
// Not meant to be instantiated
}
public static Iterator<Node> evalXPath(XPathEvaluator eval, String xpath, Node context) {
final XPathResult result = (XPathResult) eval.evaluate(xpath, context, null, (short) 0, null);
return new Iterator<Node>() {
Node cache = null;
@Override
public boolean hasNext() {
if (cache == null) {
cache = result.iterateNext();
}
return cache != null;
}
@Override
public Node next() {
if (cache == null) {
return result.iterateNext();
}
Node n = cache;
cache = null;
return n;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
}