/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.util.graph.impl;
import java.util.Iterator;
import java.util.NoSuchElementException;
import com.ibm.wala.util.graph.NumberedNodeManager;
import com.ibm.wala.util.intset.IntIterator;
import com.ibm.wala.util.intset.IntSet;
/**
*/
public class NumberedNodeIterator<T> implements Iterator<T> {
final IntIterator numbers;
final NumberedNodeManager<T> nodeManager;
/**
* @throws IllegalArgumentException if s is null
*/
public NumberedNodeIterator(IntSet s, NumberedNodeManager<T> nodeManager) {
if (s == null) {
throw new IllegalArgumentException("s is null");
}
this.numbers = s.intIterator();
this.nodeManager = nodeManager;
}
@Override
public boolean hasNext() {
return numbers.hasNext();
}
@Override
public T next() throws NoSuchElementException {
int i = numbers.next();
T result = nodeManager.getNode(i);
assert result != null : "null node for " + i;
return result;
}
@Override
public void remove() throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
}