/**

  * 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.common.ui.client.configurable.mvc.binding;

 import java.util.Iterator;

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

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

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

 import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityGroup;

 import org.kuali.student.common.ui.client.configurable.mvc.multiplicity.MultiplicityGroupItem;

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

 /**

  * This goes through each item in the MultiplicityGroup and calls it's binding

  *

  * @author Kuali Student Team

  */

 public class MultiplicityGroupBinding extends ModelWidgetBindingSupport<MultiplicityGroup> {

     public static MultiplicityGroupBinding INSTANCE = new MultiplicityGroupBinding();

     public MultiplicityGroupBinding() {};

     /**

      * @see ModelWidgetBindingSupport#setModelValue(Object,

      *      org.kuali.student.common.ui.client.mvc.DataModel, String)

      */

     public void setModelValue(MultiplicityGroup mcWidget, DataModel model, String path) {

         for (MultiplicityGroupItem item : mcWidget.getItems()) {

             MultiplicityGroupItemBinding.INSTANCE.setModelValue(item, model, mcWidget.getParentPath());

         }

         for (MultiplicityGroupItem item : mcWidget.getRemovedItems()) {

             //Check flag to add model binding for only those elements that are either added to the DB or

             // loading frm the DB.

             if(item.isCreated()==false){

                 MultiplicityGroupItemBinding.INSTANCE.setModelValue(item, model, path);

             }

         }

     }

     /**

      * @see ModelWidgetBindingSupport#setWidgetValue(Object,

      *      org.kuali.student.common.ui.client.mvc.DataModel, String)

      */

     public void setWidgetValue(MultiplicityGroup mg, DataModel model, String path) {

         mg.clear();

         String fieldPath = mg.translatePath(path);

                 mg.setParentPath(fieldPath);

         QueryPath qPath = QueryPath.parse(fieldPath);

         Data data = null;

         if(model!=null){

                 data = model.get(qPath);

         }

         if (data != null) {

             Iterator<Property> itr = data.iterator();

             while (itr.hasNext()) {

                 Property p = (Property) itr.next();

                 if (p.getKey() instanceof Integer && !isItemDeleted(model, path, (Integer)p.getKey(), mg)) {

                         MultiplicityGroupItem mgi = mg.createItem();

                     mgi.setCreated(false);

                     mgi.setItemKey((Integer) p.getKey());

                     MultiplicityGroupItemBinding.INSTANCE.setWidgetValue(mgi, model, fieldPath);

                 } else {

                         mg.incrementItemKey();

                 }

             }

         }

     }

     /**

      * Checks to see if an item at the given index in the multiplicity has been deleted

      *

      * @param model

      * @param path

      * @param index

      */

     public boolean isItemDeleted(DataModel model, String path, Integer index, MultiplicityGroup mcWidget){

             boolean isDeleted = false;

             // If multiplicity read only no point checking for deletions

             if (!mcWidget.getConfig().isUpdateable()) {

                     QueryPath runtimeDeletedPath = QueryPath.concat(path, String.valueOf(index), MultiplicityGroupItemBinding.RT_DELETED);

                     Boolean runtimeDeleted = model.get(runtimeDeletedPath);

                     if (runtimeDeleted != null){

                             isDeleted = runtimeDeleted;

                     }

                     return isDeleted;

             }

             return isDeleted;

     }

 }