JstlFnLibrary.java :  » J2EE » myfaces-core-2.0.0 » org » apache » myfaces » view » facelets » tag » jstl » fn » Java Open Source

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myfaces core 2.0.0 » org » apache » myfaces » view » facelets » tag » jstl » fn » JstlFnLibrary.java
/*
 * 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: JstlFnLibrary.java,v 1.3 2008/07/13 19:01:51 rlubke Exp $
 */
public class JstlFnLibrary implements TagLibrary
{
    public final static String 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);
    }

    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))
        {
            return this.fns.containsKey(name);
        }
        
        return false;
    }

    public Method createFunction(String ns, String name)
    {
        if (Namespace.equals(ns))
        {
            return (Method) this.fns.get(name);
        }
        
        return null;
    }
}
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