juddi-client/src/main/java/org/apache/juddi/v3/client/mapping/PolicyRoundRobin.java

/*
 * Copyright 2001-2011 The Apache Software Foundation.
 * 
 * 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.apache.juddi.v3.client.mapping;

import java.util.Properties;

public class PolicyRoundRobin implements SelectionPolicy {

	public PolicyRoundRobin(Properties properties) {}
	
	public String select(Topology topology) {
		
		if (topology.getEprs().size()==0) return null;
		
		int pointer = topology.getPointer();
		pointer = (pointer + 1) % topology.getEprs().size();
		
		topology.setPointer(pointer);
		
		return topology.getEprs().get(pointer);
	}

}