001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.compilers.opt.util;
014    
015    import java.util.Iterator;
016    
017    import org.jikesrvm.compilers.opt.OptimizingCompilerException;
018    
019    public class EmptyIterator implements Iterator<Object> {
020    
021      public boolean hasNext() {
022        return false;
023      }
024    
025      public Object next() {
026        throw new java.util.NoSuchElementException();
027      }
028    
029      public void remove() {
030        throw new OptimizingCompilerException("EmptyIterator.remove called");
031      }
032    
033      public static final EmptyIterator INSTANCE = new EmptyIterator();
034    }
035    
036    
037