View Javadoc

1   /*
2    * Copyright 2004-2009 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  package org.seasar.cubby.admin.servlet;
17  
18  import java.util.Collection;
19  import java.util.Iterator;
20  
21  class LoopingIterator<E> implements Iterator<E> {
22  
23  	private Collection<E> collection;
24  
25  	private Iterator<E> iterator;
26  
27  	public LoopingIterator(Collection<E> collection) {
28  		assert collection != null;
29  		this.collection = collection;
30  		this.iterator = collection.iterator();
31  	}
32  
33  	public boolean hasNext() {
34  		return !collection.isEmpty();
35  	}
36  
37  	public E next() {
38  		if (!iterator.hasNext()) {
39  			iterator = collection.iterator();
40  		}
41  		return iterator.next();
42  	}
43  
44  	public void remove() {
45  		iterator.remove();
46  	}
47  
48  }