/*

  * Copyright 2006-2011 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.core.web.namespace;

 import org.kuali.rice.core.impl.namespace.NamespaceBo;

 import org.kuali.rice.core.util.ConcreteKeyValue;

 import org.kuali.rice.core.util.KeyValue;

 import org.kuali.rice.kns.lookup.keyvalues.KeyValuesBase;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.service.KeyValuesService;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.List;

 public class NamespaceValuesFinder extends KeyValuesBase {

     @Override

         public List<KeyValue> getKeyValues() {

         // get a list of all Namespaces

         KeyValuesService boService = KNSServiceLocator.getKeyValuesService();

         List<NamespaceBo> bos = (List<NamespaceBo>) boService.findAll(NamespaceBo.class);

         // copy the list of codes before sorting, since we can't modify the results from this method

         if ( bos == null ) {

                 bos = new ArrayList<NamespaceBo>(0);

         } else {

                 bos = new ArrayList<NamespaceBo>( bos );

         }

         // sort using comparator.

         Collections.sort(bos, NamespaceComparator.INSTANCE); 

         // create a new list (code, descriptive-name)

         List<KeyValue> labels = new ArrayList<KeyValue>( bos.size() );

         labels.add(new ConcreteKeyValue("", ""));

         for ( NamespaceBo bo : bos ) {

             labels.add( new ConcreteKeyValue(bo.getCode(), bo.getName() ) );

         }

         return labels;

     }

     private static class NamespaceComparator implements Comparator<NamespaceBo> {

         public static final Comparator<NamespaceBo> INSTANCE = new NamespaceComparator();

         @Override

         public int compare(NamespaceBo o1, NamespaceBo o2) {

             return o1.getCode().compareTo( o2.getCode() );

         }

     }

 }