/*

  * 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 org.apache.myfaces.view.facelets.tag.jstl.fn;

 import java.lang.reflect.Method;

 import java.lang.reflect.Modifier;

 import java.util.HashMap;

 import java.util.Map;

 import javax.faces.FacesException;

 import javax.faces.view.facelets.TagConfig;

 import javax.faces.view.facelets.TagHandler;

 import org.apache.myfaces.view.facelets.tag.TagLibrary;

 /**

  * Library for JSTL Functions

  * 

  * @author Jacob Hookom

  * @version $Id$

  */

 public class JstlFnLibrary implements TagLibrary

 {

     public final static String NAMESPACE = "http://xmlns.jcp.org/jsp/jstl/functions";

     public final static String ALIAS_NAMESPACE = "http://java.sun.com/jsp/jstl/functions";

     private final Map<String, Method> fns = new HashMap<String, Method>();

     public JstlFnLibrary()

     {

         super();

         try

         {

             Method[] methods = JstlFunction.class.getMethods();

             for (int i = 0; i < methods.length; i++)

             {

                 if (Modifier.isStatic(methods[i].getModifiers()))

                 {

                     fns.put(methods[i].getName(), methods[i]);

                 }

             }

         }

         catch (Exception e)

         {

             throw new RuntimeException(e);

         }

     }

     public boolean containsNamespace(String ns)

     {

         return NAMESPACE.equals(ns) || ALIAS_NAMESPACE.equals(ns);

     }

     public boolean containsTagHandler(String ns, String localName)

     {

         return false;

     }

     public TagHandler createTagHandler(String ns, String localName, TagConfig tag) throws FacesException

     {

         return null;

     }

     public boolean containsFunction(String ns, String name)

     {

         if (NAMESPACE.equals(ns) || ALIAS_NAMESPACE.equals(ns))

         {

             return this.fns.containsKey(name);

         }

         return false;

     }

     public Method createFunction(String ns, String name)

     {

         if (NAMESPACE.equals(ns) || ALIAS_NAMESPACE.equals(ns))

         {

             return (Method) this.fns.get(name);

         }

         return null;

     }

 }