/*
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* Copyright (c) 2018-2028, DreamLu All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: DreamLu 卢春梦 (596392912@qq.com)
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*/
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package org.springblade.core.tool.utils;
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import org.springblade.core.tool.support.FastStringWriter;
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import java.io.PrintWriter;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.UndeclaredThrowableException;
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/**
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* 异常处理工具类
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*
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* @author L.cm
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*/
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public class Exceptions {
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/**
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* 将CheckedException转换为UncheckedException.
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*
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* @param e Throwable
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* @return {RuntimeException}
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*/
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public static RuntimeException unchecked(Throwable e) {
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if (e instanceof Error) {
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throw (Error) e;
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} else if (e instanceof IllegalAccessException ||
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e instanceof IllegalArgumentException ||
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e instanceof NoSuchMethodException) {
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return new IllegalArgumentException(e);
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} else if (e instanceof InvocationTargetException) {
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return new RuntimeException(((InvocationTargetException) e).getTargetException());
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} else if (e instanceof RuntimeException) {
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return (RuntimeException) e;
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} else if (e instanceof InterruptedException) {
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Thread.currentThread().interrupt();
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}
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return Exceptions.runtime(e);
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}
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/**
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* 不采用 RuntimeException 包装,直接抛出,使异常更加精准
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*
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* @param throwable Throwable
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* @param <T> 泛型标记
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* @return Throwable
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* @throws T 泛型
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*/
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@SuppressWarnings("unchecked")
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private static <T extends Throwable> T runtime(Throwable throwable) throws T {
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throw (T) throwable;
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}
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/**
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* 代理异常解包
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*
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* @param wrapped 包装过得异常
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* @return 解包后的异常
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*/
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public static Throwable unwrap(Throwable wrapped) {
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Throwable unwrapped = wrapped;
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while (true) {
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if (unwrapped instanceof InvocationTargetException) {
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unwrapped = ((InvocationTargetException) unwrapped).getTargetException();
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} else if (unwrapped instanceof UndeclaredThrowableException) {
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unwrapped = ((UndeclaredThrowableException) unwrapped).getUndeclaredThrowable();
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} else {
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return unwrapped;
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}
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}
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}
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/**
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* 将ErrorStack转化为String.
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*
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* @param ex Throwable
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* @return {String}
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*/
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public static String getStackTraceAsString(Throwable ex) {
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FastStringWriter stringWriter = new FastStringWriter();
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ex.printStackTrace(new PrintWriter(stringWriter));
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return stringWriter.toString();
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}
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}
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