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1   /*
2    * Copyright 2004-2010 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  
17  package org.seasar.cubby.admin.servlet;
18  
19  import java.util.Collection;
20  import java.util.Iterator;
21  
22  class LoopingIterator<E> implements Iterator<E> {
23  
24  	private Collection<E> collection;
25  
26  	private Iterator<E> iterator;
27  
28  	public LoopingIterator(Collection<E> collection) {
29  		assert collection != null;
30  		this.collection = collection;
31  		this.iterator = collection.iterator();
32  	}
33  
34  	public boolean hasNext() {
35  		return !collection.isEmpty();
36  	}
37  
38  	public E next() {
39  		if (!iterator.hasNext()) {
40  			iterator = collection.iterator();
41  		}
42  		return iterator.next();
43  	}
44  
45  	public void remove() {
46  		iterator.remove();
47  	}
48  
49  }