001    package org.apache.commons.ognl;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     *   http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import java.util.Map;
023    
024    /**
025     * This interface defines methods for calling methods in a target object. Methods are broken up into static and instance
026     * methods for convenience. indexes into the target object, which must be an array.
027     * 
028     * @author Luke Blanshard (blanshlu@netscape.net)
029     * @author Drew Davidson (drew@ognl.org)
030     */
031    public interface MethodAccessor
032    {
033        /**
034         * Calls the static method named with the arguments given on the class given.
035         * 
036         * @param context expression context in which the method should be called
037         * @param targetClass the object in which the method exists
038         * @param methodName the name of the method
039         * @param args the arguments to the method
040         * @return result of calling the method
041         * @exception OgnlException if there is an error calling the method
042         */
043        Object callStaticMethod( Map<String, Object> context, Class<?> targetClass, String methodName, Object[] args )
044            throws OgnlException;
045    
046        /**
047         * Calls the method named with the arguments given.
048         * 
049         * @param context expression context in which the method should be called
050         * @param target the object in which the method exists
051         * @param methodName the name of the method
052         * @param args the arguments to the method
053         * @return result of calling the method
054         * @exception OgnlException if there is an error calling the method
055         */
056        Object callMethod( Map<String, Object> context, Object target, String methodName, Object[] args )
057            throws OgnlException;
058    }