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/*
* Copyright 2002-2023 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 java.lang.reflect.Executable;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.function.Function;
import org.springframework.context.MessageSource;
import org.springframework.core.MethodParameter;
import org.springframework.http.HttpStatus;
import org.springframework.http.HttpStatusCode;
import org.springframework.http.ProblemDetail;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
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
* @author Sebastien Deleuze
* @since 3.1
*/
@SuppressWarnings("serial")
public class MethodArgumentNotValidException extends BindException implements ErrorResponse {
@Nullable
private final MethodParameter parameter;
@Nullable
private final Executable executable;
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.executable = null;
this.body = ProblemDetail.forStatusAndDetail(getStatusCode(), "Invalid request content.");
}
/**
* Constructor for {@link MethodArgumentNotValidException}.
* @param executable the executable that failed validation
* @param bindingResult the results of the validation
* @since 6.0.5
*/
public MethodArgumentNotValidException(Executable executable, BindingResult bindingResult) {
super(bindingResult);
this.parameter = null;
this.executable = executable;
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 ");
if (this.parameter != null) {
sb.append("for argument [")
.append(this.parameter.getParameterIndex()).append("] in ")
.append(this.parameter.getExecutable().toGenericString());
}
else {
sb.append("in ")
.append(this.executable.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();
}
@Override
public Object[] getDetailMessageArguments() {
return new Object[] {errorsToStringList(getGlobalErrors()), errorsToStringList(getFieldErrors())};
}
@Override
public Object[] getDetailMessageArguments(MessageSource messageSource, Locale locale) {
return new Object[] {
errorsToStringList(getGlobalErrors(), messageSource, locale),
errorsToStringList(getFieldErrors(), messageSource, locale)
};
}
/**
* Resolve global and field errors to messages with the given
* {@link MessageSource} and {@link Locale}.
* @return a Map with errors as key and resolved messages as value
* @since 6.0.3
*/
public Map resolveErrorMessages(MessageSource messageSource, Locale locale) {
Map map = new LinkedHashMap<>();
addMessages(map, getGlobalErrors(), messageSource, locale);
addMessages(map, getFieldErrors(), messageSource, locale);
return map;
}
private static void addMessages(
Map map, List errors,
MessageSource messageSource, Locale locale) {
List messages = errorsToStringList(errors, messageSource, locale);
for (int i = 0; i < errors.size(); i++) {
map.put(errors.get(i), messages.get(i));
}
}
/**
* Convert each given {@link ObjectError} to a String in single quotes, taking
* either the error's default message, or its error code.
* @since 6.0
*/
public static List errorsToStringList(List errors) {
return errorsToStringList(errors, error ->
error.getDefaultMessage() != null ? error.getDefaultMessage() : error.getCode());
}
/**
* Variant of {@link #errorsToStringList(List)} that uses a
* {@link MessageSource} to resolve the message code of the error, or fall
* back on the error's default message.
* @since 6.0
*/
public static List errorsToStringList(
List errors, @Nullable MessageSource source, Locale locale) {
return (source != null ?
errorsToStringList(errors, error -> source.getMessage(error, locale)) :
errorsToStringList(errors));
}
private static List errorsToStringList(
List errors, Function formatter) {
List result = new ArrayList<>(errors.size());
for (ObjectError error : errors) {
String value = formatter.apply(error);
if (StringUtils.hasText(value)) {
result.add(error instanceof FieldError fieldError ?
fieldError.getField() + ": '" + value + "'" : "'" + value + "'");
}
}
return result;
}
}
