/**

  * Copyright 2005-2011 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.krad.uif.container;

 import org.kuali.rice.core.api.mo.common.active.Inactivatable;

 import org.kuali.rice.krad.uif.view.View;

 import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;

 import java.util.ArrayList;

 import java.util.List;

 /**

  * Collection filter that removes inactive lines from a collection whose line types

  * implement the <code>Inactivatable</code> interface

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ActiveCollectionFilter implements CollectionFilter {

     private static final long serialVersionUID = 3273495753269940272L;

     /**

      * Iterates through the collection and if the collection line type implements <code>Inactivatable</code>,

      * active indexes are added to the show indexes list

      *

      * @see CollectionFilter#filter(org.kuali.rice.krad.uif.view.View, Object, org.kuali.rice.krad.uif.container.CollectionGroup)

      */

     @Override

     public List<Integer> filter(View view, Object model, CollectionGroup collectionGroup) {

         // get the collection for this group from the model

         List<Object> modelCollection =

                 ObjectPropertyUtils.getPropertyValue(model, collectionGroup.getBindingInfo().getBindingPath());

         // iterate through and add only active indexes

         List<Integer> showIndexes = new ArrayList<Integer>();

         if (modelCollection != null) {

             int lineIndex = 0;

             for (Object line : modelCollection) {

                 if (line instanceof Inactivatable) {

                     boolean active = ((Inactivatable) line).isActive();

                     if (active) {

                         showIndexes.add(lineIndex);

                     }

                 }

                 lineIndex++;

             }

         }

         return showIndexes;

     }

 }