001/* 002 * Copyright 2002-2017 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.messaging.handler.invocation; 018 019import org.springframework.core.MethodParameter; 020import org.springframework.lang.Nullable; 021import org.springframework.messaging.Message; 022import org.springframework.messaging.MessagingException; 023 024/** 025 * Common exception resulting from the invocation of 026 * {@link org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolver}. 027 * 028 * @author Juergen Hoeller 029 * @since 4.3.6 030 * @see HandlerMethodArgumentResolver 031 */ 032@SuppressWarnings("serial") 033public class MethodArgumentResolutionException extends MessagingException { 034 035 private final MethodParameter parameter; 036 037 038 /** 039 * Create a new instance providing the invalid {@code MethodParameter}. 040 */ 041 public MethodArgumentResolutionException(Message<?> message, MethodParameter parameter) { 042 super(message, getMethodParameterMessage(parameter)); 043 this.parameter = parameter; 044 } 045 046 /** 047 * Create a new instance providing the invalid {@code MethodParameter} and 048 * a prepared description. 049 */ 050 public MethodArgumentResolutionException(Message<?> message, MethodParameter parameter, String description) { 051 super(message, getMethodParameterMessage(parameter) + ": " + description); 052 this.parameter = parameter; 053 } 054 055 /** 056 * Create a new instance providing the invalid {@code MethodParameter}, 057 * prepared description, and a cause. 058 */ 059 public MethodArgumentResolutionException( 060 Message<?> message, MethodParameter parameter, String description, @Nullable Throwable cause) { 061 062 super(message, getMethodParameterMessage(parameter) + ": " + description, cause); 063 this.parameter = parameter; 064 } 065 066 067 /** 068 * Return the MethodParameter that was rejected. 069 */ 070 public final MethodParameter getMethodParameter() { 071 return this.parameter; 072 } 073 074 075 private static String getMethodParameterMessage(MethodParameter parameter) { 076 return "Could not resolve method parameter at index " + parameter.getParameterIndex() + 077 " in " + parameter.getExecutable().toGenericString(); 078 } 079 080}