/**
    * Copyright 2010-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.common.util.spring;
  
  import java.util.Collection;
  import java.util.List;
  
  import org.kuali.common.util.Assert;
  import org.springframework.beans.factory.FactoryBean;
  import org.springframework.beans.factory.InitializingBean;
  
  /**
   * Append all of the elements from <code>source</code> to the end of <code>target</code>
   */
  public class AddToListFactoryBean<T> implements FactoryBean<List<T>>, InitializingBean {
  
  	List<T> source;
  	List<T> target;
  
  	@Override
  	public void afterPropertiesSet() throws Exception {
  		Assert.notNull(source, "source is null");
  		Assert.notNull(target, "target is null");
  		target.addAll(source);
  	}
  
  	@Override
  	public List<T> getObject() throws Exception {
  		return target;
  	}
  
  	@Override
  	public Class<?> getObjectType() {
  		return List.class;
  	}
  
  	@Override
  	public boolean isSingleton() {
  		return false;
  	}
  
  	public Collection<T> getSource() {
  		return source;
  	}
  
  	public void setSource(List<T> source) {
  		this.source = source;
  	}
  
  	public Collection<T> getTarget() {
  		return target;
  	}
  
  	public void setTarget(List<T> target) {
  		this.target = target;
  	}
  
  }