/**

  * Copyright 2010 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.osedu.org/licenses/ECL-2.0

  *

  * 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.student.lum.lu.ui.tools.client.widgets.itemlist;

 import java.util.List;

 import org.kuali.student.common.assembly.data.Data;

 import org.kuali.student.common.assembly.data.QueryPath;

 import org.kuali.student.common.ui.client.configurable.mvc.binding.ModelWidgetBindingSupport;

 import org.kuali.student.common.ui.client.mvc.DataModel;

 public abstract class ItemListFieldBinding<V extends ItemValue<V>> extends ModelWidgetBindingSupport<ItemList<V>> {

     @Override

     public void setModelValue(ItemList<V> widget, DataModel model, String path) {

         QueryPath qPath = QueryPath.parse(path);

         List<V> values = widget.getValue();

         Data valuesData = new Data();

         if (values != null) {

             for (V val : values) {

                 Data valueData = new Data();

                 setItemData(val, valueData);

                 valuesData.add(valueData);

             }

         }

         model.set(qPath, valuesData);

     }

     @Override

     public void setWidgetValue(ItemList<V> widget, DataModel model, String path) {

         QueryPath qPath = QueryPath.parse(path);

         Data valueData = model.get(qPath);

         List<V> values = null;

         if (valueData != null) {

             values = getItemList(valueData);

             widget.setValue(values);

         } else {

             widget.setValue(null);

         }

     }

     /**

      * Used by setModelValue to set values specific to the type of Item

      * @param val

      * @param data

      */

     public abstract void setItemData(V val, Data data);

     public abstract List<V> getItemList(Data data);

 }