/* * Copyright 2018 Dieter Bogdoll * * 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 io.github.dibog; import ch.qos.logback.classic.spi.IThrowableProxy; import ch.qos.logback.classic.spi.StackTraceElementProxy; class ExceptionUtil { public static String toString(IThrowableProxy aException) { StringBuilder sb = new StringBuilder(); appendProxy(sb, "", "", aException); return sb.toString(); } private static void appendProxy(StringBuilder sb, String aPrefix, String aHeader, IThrowableProxy aException) { sb.append(aPrefix + aHeader + aException.getClassName() + ": " +aException.getMessage() + "\n"); String prefix = aPrefix+"\t"; appendStackTrace(sb, prefix, aException); IThrowableProxy[] suppressed = aException.getSuppressed(); if(suppressed!=null) { for(IThrowableProxy supp : suppressed) { if(supp!=null) { appendProxy(sb, prefix, "Suppressed: ", supp); } } } IThrowableProxy cause = aException.getCause(); if(cause!=null) { appendProxy(sb, prefix, "Causd by: ", cause); } } private static void appendStackTrace(StringBuilder sb, String prefix, IThrowableProxy aProxy) { StackTraceElementProxy[] frames = aProxy.getStackTraceElementProxyArray(); int commonFrames = aProxy.getCommonFrames(); for(int i=0, size=frames.length-commonFrames; i<size; ++i) { sb.append(prefix+frames[i]+"\n"); } if (commonFrames>0) { sb.append(prefix+"... "+commonFrames+" more"+"\n"); } } }