/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * Licensed 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 org.seasar.teeda.core.util;

 import java.util.Iterator;

 import java.util.NoSuchElementException;

 import org.seasar.framework.util.AssertionUtil;

 public class LoopIterator implements Iterator {

     private static final int INITIAL_INDEX = 0;

     private Object[] values_;

     private int index_ = INITIAL_INDEX;

     public LoopIterator(Object[] values) {

         AssertionUtil.assertNotNull("values is null.", values);

         values_ = values;

     }

     public boolean hasNext() {

         if (values_.length > 0) {

             return true;

         }

         return false;

     }

     public Object next() {

         if (values_.length < 1) {

             throw new NoSuchElementException("next");

         }

         if (values_.length <= index_) {

             reset();

         }

         Object value = values_[index_];

         index_++;

         return value;

     }

     public void remove() {

         // XXX should be supported?

         throw new UnsupportedOperationException("remove");

     }

     public void reset() {

         index_ = INITIAL_INDEX;

     }

 }