/**
 * @author xichao.dong   
 * @email 406592176@qq.com
 * @date 2014-8-15 上午8:50:38 
 * @company (开发公司)    珠海市冰川软件有限公司
 * @copyright (版权)    本文件归属珠海市冰川软件有限公司所有
 * @version V1.0
 * @modify (修改) : 2014-8-15 上午8:50:38  xichao.dong 
 * @Review (审核人) ：xichao.dong 
 */
package com.glacier.basic.util;

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

/**
 * @ClassName: Exceptions 
 * @Description: TODO(关于异常的工具类) 
 * @author xichao.dong	
 * @email 406592176@qq.com
 * @date 2014-8-15 上午11:14:52
 */
public class Exceptions {
    /**
     * 将CheckedException转换为UncheckedException.
     */
    public static RuntimeException unchecked(Exception e) {
        if (e instanceof RuntimeException) {
            return (RuntimeException) e;
        } else {
            return new RuntimeException(e);
        }
    }

    /**
     * 将ErrorStack转化为String.
     */
    public static String getStackTraceAsString(Exception e) {
        StringWriter stringWriter = new StringWriter();
        e.printStackTrace(new PrintWriter(stringWriter));
        return stringWriter.toString();
    }

    /**
     * 判断异常是否由某些底层的异常引起.
     */
    public static boolean isCausedBy(Exception ex, Class<? extends Exception>... causeExceptionClasses) {
        Throwable cause = ex.getCause();
        while (cause != null) {
            for (Class<? extends Exception> causeClass : causeExceptionClasses) {
                if (causeClass.isInstance(cause)) {
                    return true;
                }
            }
            cause = cause.getCause();
        }
        return false;
    }
}