spring MethodArgumentNotValidException 源码
spring MethodArgumentNotValidException 代码
文件路径：/spring-web/src/main/java/org/springframework/web/bind/MethodArgumentNotValidException.java
/*
* Copyright 2002-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.bind;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpStatus;
import org.springframework.http.HttpStatusCode;
import org.springframework.http.ProblemDetail;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.ErrorResponse;
/**
* Exception to be thrown when validation on an argument annotated with {@code @Valid} fails.
* Extends {@link BindException} as of 5.3.
*
* @author Rossen Stoyanchev
* @author Juergen Hoeller
* @since 3.1
*/
@SuppressWarnings("serial")
public class MethodArgumentNotValidException extends BindException implements ErrorResponse {
private final MethodParameter parameter;
private final ProblemDetail body;
/**
* Constructor for {@link MethodArgumentNotValidException}.
* @param parameter the parameter that failed validation
* @param bindingResult the results of the validation
*/
public MethodArgumentNotValidException(MethodParameter parameter, BindingResult bindingResult) {
super(bindingResult);
this.parameter = parameter;
this.body = ProblemDetail.forStatusAndDetail(getStatusCode(), "Invalid request content.");
}
@Override
public HttpStatusCode getStatusCode() {
return HttpStatus.BAD_REQUEST;
}
@Override
public ProblemDetail getBody() {
return this.body;
}
/**
* Return the method parameter that failed validation.
*/
public final MethodParameter getParameter() {
return this.parameter;
}
@Override
public String getMessage() {
StringBuilder sb = new StringBuilder("Validation failed for argument [")
.append(this.parameter.getParameterIndex()).append("] in ")
.append(this.parameter.getExecutable().toGenericString());
BindingResult bindingResult = getBindingResult();
if (bindingResult.getErrorCount() > 1) {
sb.append(" with ").append(bindingResult.getErrorCount()).append(" errors");
}
sb.append(": ");
for (ObjectError error : bindingResult.getAllErrors()) {
sb.append('[').append(error).append("] ");
}
return sb.toString();
}
}
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