com.kixeye.chassis.transport.ExceptionServiceErrorMapper.java Source code

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Here is the source code for com.kixeye.chassis.transport.ExceptionServiceErrorMapper.java

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package com.kixeye.chassis.transport;

/*
 * #%L
 * Chassis Transport Core
 * %%
 * Copyright (C) 2014 KIXEYE, 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.
 * #L%
 */

import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.kixeye.chassis.transport.dto.ServiceError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import java.util.List;

/**
 * Maps exceptions into service errors.
 * 
 * @author ebahtijaragic
 */
public class ExceptionServiceErrorMapper {
    public static final String UNKNOWN_ERROR_CODE = "UNKNOWN";
    public static final String VALIDATION_ERROR_CODE = "VALIDATION";
    public static final String SECURITY_ERROR_CODE = "SECURITY";

    /**
     * Maps an exception to an error.
     * 
     * @param ex
     * @return
     */
    public static ServiceError mapException(Throwable ex) {
        ServiceError error = null;

        if (ex instanceof ServiceException) {
            ServiceException servEx = (ServiceException) ex;

            error = servEx.error;
        } else if (ex instanceof MethodArgumentNotValidException) {
            MethodArgumentNotValidException validationEx = (MethodArgumentNotValidException) ex;

            List<String> errors = Lists.newArrayList();

            for (ObjectError objError : validationEx.getBindingResult().getAllErrors()) {
                errors.add(
                        objError.getObjectName() + ":" + objError.getCode() + ":" + objError.getDefaultMessage());
            }

            error = new ServiceError(VALIDATION_ERROR_CODE, Joiner.on("|").join(errors));
        } else {
            error = new ServiceError(UNKNOWN_ERROR_CODE, ex.getMessage());
        }

        return error;
    }
}