/*
    * Copyright 2007-2009 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.rice.kns.bo.options;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.List;
  
  import org.kuali.rice.core.util.KeyLabelPair;
  import org.kuali.rice.kns.bo.State;
  import org.kuali.rice.kns.lookup.keyvalues.KeyValuesBase;
  import org.kuali.rice.kns.service.KNSServiceLocator;
  
  /**
   * This class...
   */
  public class StateValuesFinder extends KeyValuesBase {
  
  	private static List<KeyLabelPair> labels;
      /*
       * @see org.kuali.keyvalues.KeyValuesFinder#getKeyValues()
       */
      public List<KeyLabelPair> getKeyValues() {
      	if ( labels == null ) {
      		List<State> baseCodes = KNSServiceLocator.getStateService().findAllStates();
      		List<State> codes = new ArrayList<State>( baseCodes );
      		Collections.sort(codes, new Comparator<State> () {
  				public int compare(State o1, State o2) {
  					return o1.getPostalStateName().compareTo(o2.getPostalStateName());
  				}
      		});
      		
      		List<KeyLabelPair> newLabels = new ArrayList<KeyLabelPair>();
  	        newLabels.add(new KeyLabelPair("", ""));
  	        for (State state : codes) {
  	            if(state.isActive()) {
  	                newLabels.add(new KeyLabelPair(state.getPostalStateCode(), state.getPostalStateName()));
  	            }
  	        }
  	        labels = newLabels;
      	}
  
          return labels;
      }
  
      @Override
      public void clearInternalCache() {
      	labels = null;
      }
  }