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1   /*
2    * Copyright 2001-2011 The Apache Software Foundation.
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, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   *
16   */
17  package org.apache.juddi.v3.client.mapping;
18  
19  import java.util.Properties;
20  
21  public class PolicyRoundRobin implements SelectionPolicy {
22  
23  	public PolicyRoundRobin(Properties properties) {}
24  	
25  	public String select(Topology topology) {
26  		
27  		if (topology.getEprs().size()==0) return null;
28  		
29  		int pointer = topology.getPointer();
30  		pointer = (pointer + 1) % topology.getEprs().size();
31  		
32  		topology.setPointer(pointer);
33  		
34  		return topology.getEprs().get(pointer);
35  	}
36  
37  }