/*

  * 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.internal;

 import java.util.HashMap;

 import java.util.Map;

 import javax.faces.convert.Converter;

 import org.seasar.framework.util.ArrayUtil;

 /**

  * @author shot

  */

 public class ConverterResource {

     private static Map converterPairs = new HashMap();

     private static ConverterBuilder builder;

     protected ConverterResource() {

     }

     public static synchronized Converter getConverter(final String expression) {

         if (builder == null) {

             return null;

         }

         ConverterPair[] pairs = (ConverterPair[]) converterPairs

                 .get(expression);

         return builder.build(expression, pairs);

     }

     public static synchronized void addConverter(final String expression,

             final String converterName) {

         addConverter(expression, converterName, new HashMap());

     }

     public static synchronized void addConverter(final String expression,

             final String converterName, final Map properties) {

         ConverterPair pair = new ConverterPair(converterName, properties);

         ConverterPair[] pairs = (ConverterPair[]) converterPairs

                 .get(expression);

         if (pairs == null) {

             pairs = new ConverterPair[0];

         }

         converterPairs.put(expression, ArrayUtil.add(pairs, pair));

     }

     public static synchronized void removeConverter(String expression) {

         converterPairs.remove(expression);

         if (builder != null) {

             builder.clearConverter(expression);

         }

     }

     public static void removeAll() {

         converterPairs.clear();

         if (builder != null) {

             builder.clearAll();

         }

     }

     public static void setConverterBuilder(final ConverterBuilder cb) {

         builder = cb;

     }

     public static class ConverterPair {

         public String converterName;

         public Map properties;

         public ConverterPair(final String converterName, final Map properties) {

             this.converterName = converterName;

             this.properties = properties;

         }

     }

 }