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; 022import org.springframework.lang.Nullable; 023 024/** 025 * A method resolver attempts locate a method and returns a command executor that can be 026 * used to invoke that method. The command executor will be cached but if it 'goes stale' 027 * the resolvers will be called again. 028 * 029 * @author Andy Clement 030 * @since 3.0 031 */ 032public interface MethodResolver { 033 034 /** 035 * Within the supplied context determine a suitable method on the supplied object that 036 * can handle the specified arguments. Return a {@link MethodExecutor} that can be used 037 * to invoke that method, or {@code null} if no method could be found. 038 * @param context the current evaluation context 039 * @param targetObject the object upon which the method is being called 040 * @param argumentTypes the arguments that the constructor must be able to handle 041 * @return a MethodExecutor that can invoke the method, or null if the method cannot be found 042 */ 043 @Nullable 044 MethodExecutor resolve(EvaluationContext context, Object targetObject, String name, 045 List<TypeDescriptor> argumentTypes) throws AccessException; 046 047}