1 /* 2 * Copyright 2002-2011 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.springframework.web.bind; 18 19 import org.springframework.core.MethodParameter; 20 import org.springframework.validation.BindingResult; 21 import org.springframework.validation.ObjectError; 22 23 /** 24 * Exception to be thrown when validation on an argument annotated with {@code @Valid} fails. 25 * 26 * @author Rossen Stoyanchev 27 * @since 3.1 28 */ 29 public class MethodArgumentNotValidException extends Exception { 30 31 private final MethodParameter parameter; 32 33 private final BindingResult bindingResult; 34 35 36 /** 37 * Constructor for {@link MethodArgumentNotValidException}. 38 * @param parameter the parameter that failed validation 39 * @param bindingResult the results of the validation 40 */ MethodArgumentNotValidException(MethodParameter parameter, BindingResult bindingResult)41 public MethodArgumentNotValidException(MethodParameter parameter, BindingResult bindingResult) { 42 this.parameter = parameter; 43 this.bindingResult = bindingResult; 44 } 45 46 /** 47 * Return the method parameter that failed validation. 48 */ getParameter()49 public MethodParameter getParameter() { 50 return this.parameter; 51 } 52 53 /** 54 * Return the results of the failed validation. 55 */ getBindingResult()56 public BindingResult getBindingResult() { 57 return this.bindingResult; 58 } 59 60 61 @Override getMessage()62 public String getMessage() { 63 StringBuilder sb = new StringBuilder("Validation failed for argument at index ") 64 .append(this.parameter.getParameterIndex()).append(" in method: ") 65 .append(this.parameter.getMethod().toGenericString()) 66 .append(", with ").append(this.bindingResult.getErrorCount()).append(" error(s): "); 67 for (ObjectError error : this.bindingResult.getAllErrors()) { 68 sb.append("[").append(error).append("] "); 69 } 70 return sb.toString(); 71 } 72 73 } 74