/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache 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.apache.org/licenses/LICENSE-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 javax.faces.component;

 import java.util.Arrays;

 import java.util.Iterator;

 import javax.faces.context.FacesContext;

 import javax.faces.model.SelectItem;

 import javax.faces.model.SelectItemGroup;

 /**

  * @author Mathias Broekelmann (latest modification by $Author: skitching $)

  * @version $Revision: 676298 $ $Date: 2008-07-13 05:31:48 -0500 (Sun, 13 Jul 2008) $

  */

 class _SelectItemsUtil

 {

     public static interface _ValueConverter

     {

         Object getConvertedValue(FacesContext context, String value);

     }

     /**

      * @param context the faces context

      * @param value the value to check

      * @param converter 

      * @param iterator contains instances of SelectItem

      * @return if the value of a selectitem is equal to the given value

      */

     public static boolean matchValue(FacesContext context, Object value,

                     Iterator<SelectItem> selectItemsIter, _ValueConverter converter)

     {

         while (selectItemsIter.hasNext())

         {

             SelectItem item = selectItemsIter.next();

             if (item instanceof SelectItemGroup)

             {

                 SelectItemGroup itemgroup = (SelectItemGroup) item;

                 SelectItem[] selectItems = itemgroup.getSelectItems();

                 if (selectItems != null

                                 && selectItems.length > 0

                                 && matchValue(context, value, Arrays.asList(

                                                 selectItems).iterator(), converter))

                 {

                     return true;

                 }

             }

             else

             {

                 Object itemValue = item.getValue();

                 if(converter != null && itemValue instanceof String)

                 {

                     itemValue = converter.getConvertedValue(context, (String)itemValue);

                 }

                 if (value==itemValue || value.equals(itemValue))

                 {

                     return true;

                 }

             }

         }

         return false;

     }

 }