1 /* 2 * $Id$ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 package org.apache.struts.dispatcher; 22 23 import java.io.Serializable; 24 import java.lang.reflect.Method; 25 26 import org.apache.struts.chain.contexts.ActionContext; 27 28 /** 29 * This interface defines a pluggable strategy for resolving a method and 30 * extracting its methods from an {@link ActionContext}. A {@link Dispatcher} 31 * may use the resolver to separate out its method resolution based on 32 * technology (such as servlets, portlets, etc.). 33 * 34 * @version $Rev$ 35 * @since Struts 1.4 36 */ 37 public interface MethodResolver extends Serializable{ 38 39 /** 40 * Constructs the arguments that will be passed to the dispatched method. 41 * 42 * @param context the current action context 43 * @param method the target method of this dispatch 44 * 45 * @return the arguments array for the method, or <code>null</code> if the 46 * method does not match any supported signatures 47 * @see #resolveMethod(ActionContext, String) 48 */ 49 Object[] buildArguments(ActionContext context, Method method); 50 51 /** 52 * Decides the appropriate method instance for the specified method name. 53 * Implementations may introspect for any desired method signature. 54 * 55 * @param context the current action context 56 * @param methodName the method name to use for introspection 57 * @return the method to invoke 58 * @throws NoSuchMethodException if an appropriate method cannot be found 59 */ 60 Method resolveMethod(ActionContext context, String methodName) throws NoSuchMethodException; 61 }