001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    //
021    // This source code implements specifications defined by the Java
022    // Community Process. In order to remain compliant with the specification
023    // DO NOT add / change / or delete method signatures!
024    //
025    
026    package javax.servlet.jsp.el;
027    
028    /**
029     * <p>The interface to a map between EL function names and methods.</p>
030     *
031     * <p>Classes implementing this interface may, for instance, consult tag library
032     * information to resolve the map. </p>
033     *
034     * @since 2.0
035     */
036    public interface FunctionMapper {
037      /**
038       * Resolves the specified local name and prefix into a Java.lang.Method.
039       * Returns null if the prefix and local name are not found.
040       * 
041       * @param prefix the prefix of the function, or "" if no prefix.
042       * @param localName the short name of the function
043       * @return the result of the method mapping.  Null means no entry found.
044       **/
045      public java.lang.reflect.Method resolveFunction(String prefix, 
046          String localName);
047    }