001/*
002 * Copyright 2002-2013 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.expression;
018
019import java.util.List;
020
021import org.springframework.core.convert.TypeDescriptor;
022
023/**
024 * A method resolver attempts locate a method and returns a command executor that can be
025 * used to invoke that method. The command executor will be cached but if it 'goes stale'
026 * the resolvers will be called again.
027 *
028 * @author Andy Clement
029 * @since 3.0
030 */
031public interface MethodResolver {
032
033        /**
034         * Within the supplied context determine a suitable method on the supplied object that
035         * can handle the specified arguments. Return a {@link MethodExecutor} that can be used
036         * to invoke that method, or {@code null} if no method could be found.
037         * @param context the current evaluation context
038         * @param targetObject the object upon which the method is being called
039         * @param argumentTypes the arguments that the constructor must be able to handle
040         * @return a MethodExecutor that can invoke the method, or null if the method cannot be found
041         */
042        MethodExecutor resolve(EvaluationContext context, Object targetObject, String name,
043                        List<TypeDescriptor> argumentTypes) throws AccessException;
044
045}