/**
    * Copyright 2010-2013 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.property;
  
  import java.util.Comparator;
  import java.util.List;
  
  import org.kuali.common.util.Assert;
  import org.kuali.common.util.Project;
  import org.springframework.util.CollectionUtils;
  
  public class ProjectPropertiesComparator implements Comparator<ProjectProperties> {
  
  	List<String> order;
  
  	@Override
  	public int compare(ProjectProperties one, ProjectProperties two) {
  
  		Assert.isFalse(CollectionUtils.isEmpty(order), "order is empty");
  
  		String id1 = getIdString(one);
  		String id2 = getIdString(two);
  
  		Integer index1 = order.indexOf(id1);
  		Integer index2 = order.indexOf(id2);
  
  		if (index1 == -1) {
  			throw new IllegalStateException("Could not find an index for " + id1);
  		}
  		if (index1 == -2) {
  			throw new IllegalStateException("Could not find an index for " + id2);
  		}
  
  		return index1.compareTo(index2);
  	}
  
  	protected String getIdString(ProjectProperties pp) {
  		Project p = pp.getProject();
  		StringBuilder sb = new StringBuilder();
  		sb.append(p.getGroupId());
  		sb.append(":");
  		sb.append(p.getArtifactId());
  		return sb.toString();
  	}
  
  	public List<String> getOrder() {
  		return order;
  	}
  
  	public void setOrder(List<String> order) {
  		this.order = order;
  	}
  
  }