ReverseVectorEnumerator.java

/*
 * @(#)ReverseVectorEnumerator.java 5.1
 *
 */

package CH.ifa.draw.util;

import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Vector;

/**
 * An Enumeration that enumerates a vector back (size-1) to front (0).
 */
public class ReverseVectorEnumerator
implements Enumeration {

	Vector vector;
	int count;

	public ReverseVectorEnumerator(Vector v) {
	    vector = v;
	    count = vector.size() - 1;
	}

	public boolean hasMoreElements() {
	    return count >= 0;
	}

	public Object nextElement() {
	    if (count >= 0) {
		    return vector.elementAt(count--);
	    }
	    throw new NoSuchElementException("ReverseVectorEnumerator");
	}

}