de.knightsoftnet.validators.server.controller.RestErrorHandler.java Source code

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Here is the source code for de.knightsoftnet.validators.server.controller.RestErrorHandler.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You 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 de.knightsoftnet.validators.server.controller;

import de.knightsoftnet.validators.shared.data.ValidationDto;
import de.knightsoftnet.validators.shared.data.ValidationResultData;
import de.knightsoftnet.validators.shared.data.ValidationResultInterface;
import de.knightsoftnet.validators.shared.data.ValidationValueInterface;

import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;

import java.util.List;

/**
 * This error handler handles validation errors.
 *
 * @author Manfred Tremmel
 */
@ControllerAdvice
public class RestErrorHandler {

    /**
     * handle validation errors.
     *
     * @param pexception exception which is thrown when data is invalid.
     * @return ValidationResultData with validation errors
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ResponseBody
    public ValidationResultInterface processValidationError(final MethodArgumentNotValidException pexception) {
        final BindingResult result = pexception.getBindingResult();
        final List<FieldError> fieldErrors = result.getFieldErrors();

        return this.processFieldErrors(fieldErrors);
    }

    private ValidationResultInterface processFieldErrors(final List<FieldError> pfieldErrors) {
        final ValidationResultInterface validationResult = new ValidationResultData();

        for (final FieldError fieldError : pfieldErrors) {
            final ValidationValueInterface validationDto = new ValidationDto();
            validationDto.setPropertyPath(fieldError.getField());
            validationDto.setMessage(fieldError.getDefaultMessage());
            validationResult.getValidationErrorSet().add(validationDto);
        }

        return validationResult;
    }
}