/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 javax.faces.convert;

 import javax.faces.component.UIComponent;

 import javax.faces.context.FacesContext;

 import javax.faces.internal.ConvertUtil;

 import javax.faces.internal.FacesMessageUtil;

 import org.seasar.framework.util.AssertionUtil;

 /**

  * @author shot

  */

 public class CharacterConverter implements Converter {

     public static final String CONVERTER_ID = "javax.faces.Character";

     public static final String CONVERSION_OBJECT_ID = CharacterConverter.class

             .getName()

             + ".CONVERSION";

     public static final String CONVERSION_STRING_ID = CharacterConverter.class

             .getName()

             + ".CONVERSION_STRING";

     public CharacterConverter() {

     }

     public Object getAsObject(FacesContext context, UIComponent component,

             String value) throws ConverterException {

         AssertionUtil.assertNotNull("FacesContext", context);

         AssertionUtil.assertNotNull("UIComponent", component);

         if (value == null) {

             return null;

         }

         value = value.trim();

         if (value.length() < 1) {

             Object[] args = ConvertUtil.createExceptionMessageArgs(component,

                     value);

             throw new ConverterException(FacesMessageUtil.getMessage(context,

                     getObjectMessageId(), args));

         }

         try {

             return new Character(value.charAt(0));

         } catch (Exception e) {

             Object[] args = ConvertUtil.createExceptionMessageArgs(component,

                     value);

             throw new ConverterException(FacesMessageUtil.getMessage(context,

                     getObjectMessageId(), args), e);

         }

     }

     public String getAsString(FacesContext context, UIComponent component,

             Object value) throws ConverterException {

         AssertionUtil.assertNotNull("FacesContext", context);

         AssertionUtil.assertNotNull("UIComponent", component);

         if (value == null) {

             return "";

         }

         try {

             return (value instanceof String) ? (String) value

                     : ((Character) value).toString();

         } catch (Exception e) {

             Object[] args = ConvertUtil.createExceptionMessageArgs(component,

                     value);

             throw new ConverterException(FacesMessageUtil.getMessage(context,

                     getStringMessageId(), args), e);

         }

     }

     protected String getObjectMessageId() {

         return CONVERSION_OBJECT_ID;

     }

     protected String getStringMessageId() {

         return CONVERSION_STRING_ID;

     }

 }