// Copyright 2007, 2008 The Apache Software Foundation

 //

 // Licensed 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 org.apache.tapestry5.util;

 import org.apache.tapestry5.OptionGroupModel;

 import org.apache.tapestry5.OptionModel;

 import org.apache.tapestry5.internal.OptionModelImpl;

 import org.apache.tapestry5.internal.TapestryInternalUtils;

 import org.apache.tapestry5.ioc.Messages;

 import org.apache.tapestry5.ioc.internal.util.CollectionFactory;

 import static org.apache.tapestry5.ioc.internal.util.Defense.notNull;

 import java.io.Serializable;

 import java.util.List;

 /**

  * A basic select model for a particular Enum type. The labels for each Enum are drawn from the Enum instance name and

  * the provides message catalog: <ul> <li>As key <em>ClassName</em>.<em>name</em> if present. The class name excludes

  * the package portion. Ex: "ElementType.LOCAL_VARIABLE" <li>As key <em>name</em> if present, i.e., "LOCAL_VARIABLE".

  * <li>As a user-presentable version of the name, i.e., "Local Variable". </ul>

  */

 public final class EnumSelectModel extends AbstractSelectModel implements Serializable

 {

     private static final long serialVersionUID = -3590412082766899684L;

     private final List<OptionModel> options = CollectionFactory.newList();

     public <T extends Enum> EnumSelectModel(Class<T> enumClass, Messages messages)

     {

         this(enumClass, messages, enumClass.getEnumConstants());

     }

     public <T extends Enum> EnumSelectModel(Class<T> enumClass, Messages messages, T[] values)

     {

         notNull(enumClass, "enumClass");

         notNull(messages, "messages");

         String prefix = enumClass.getSimpleName();

         for (T value : values)

         {

             String label = TapestryInternalUtils.getLabelForEnum(messages, prefix, value);

             options.add(new OptionModelImpl(label, value));

         }

     }

     /**

      * Returns null.

      */

     public List<OptionGroupModel> getOptionGroups()

     {

         return null;

     }

     /**

      * Returns the option groupos created in the constructor.

      */

     public List<OptionModel> getOptions()

     {

         return options;

     }

 }