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/*
 * Copyright 1999-2015 dangdang.com.
 * 
 * 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.dangdang.ddframe.job.exception;

import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.io.PrintWriter;
import java.io.StringWriter;

/**
 * 异常处理工具类.
 *
 * @author caohao
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class ExceptionUtil {
    
    /**
     * 将Throwable异常转换为字符串.
     *
     * @param cause 需要转换的异常
     * @return 转换后的异常字符串
     */
    public static String transform(final Throwable cause) {
        if (null == cause) {
            return "";
        }
        StringWriter result = new StringWriter();
        try (PrintWriter writer = new PrintWriter(result)) {
            cause.printStackTrace(writer);
        }
        return result.toString();
    }
}