Java tutorial
/* * Copyright 2012 Janrain, Inc. * * 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 * * http://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 com.janrain.backplane.server; import org.springframework.http.HttpStatus; import org.springframework.validation.BindingResult; import org.springframework.validation.FieldError; import org.springframework.web.bind.annotation.ResponseStatus; import javax.validation.ConstraintViolation; import java.util.HashMap; import java.util.Map; import java.util.Set; @ResponseStatus(value = HttpStatus.BAD_REQUEST) public class InvalidRequestException extends RuntimeException { private static final long serialVersionUID = 1L; private Map<String, String> fieldErrors = new HashMap<String, String>(); boolean hasMessageFlag = false; public InvalidRequestException() { super(); } public InvalidRequestException(String message) { super(message); hasMessageFlag = true; } public InvalidRequestException(BindingResult result) { for (FieldError error : result.getFieldErrors()) { fieldErrors.put(error.getField(), error.getDefaultMessage()); } } public <T> InvalidRequestException(Set<ConstraintViolation<T>> failures) { for (ConstraintViolation<T> failure : failures) { fieldErrors.put(failure.getPropertyPath().toString(), failure.getMessage()); } } public Map<String, String> getFieldErrors() { return fieldErrors; } public boolean hasErrors() { return hasFieldErrors(); } public boolean hasFieldErrors() { return !fieldErrors.isEmpty(); } public boolean hasMessage() { return hasMessageFlag; } public String toString() { StringBuilder out = new StringBuilder(); if (hasMessage()) { out.append(getMessage()); } if (hasFieldErrors()) { for (String field : fieldErrors.keySet()) { out.append(field).append(": ").append(fieldErrors.get(field)); } } return out.toString(); } }