| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * 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.android.loganalysis.parser; |
| |
| import com.android.loganalysis.item.JavaCrashItem; |
| |
| import java.util.List; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * An {@link IParser} to handle Java crashes. |
| */ |
| public class JavaCrashParser implements IParser { |
| |
| /** |
| * Matches: java.lang.Exception |
| * Matches: java.lang.Exception: reason |
| */ |
| private static final Pattern EXCEPTION = Pattern.compile("^([^\\s:]+)(: (.*))?$"); |
| /** |
| * Matches: Caused by: java.lang.Exception |
| */ |
| private static final Pattern CAUSEDBY = Pattern.compile("^Caused by: .+$"); |
| /** |
| * Matches: \tat class.method(Class.java:1) |
| */ |
| private static final Pattern AT = Pattern.compile("^\tat .+$"); |
| |
| // Sometimes logcat explicitly marks where exception begins and ends |
| private static final String BEGIN_MARKER = "----- begin exception -----"; |
| private static final String END_MARKER = "----- end exception -----"; |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @return The {@link JavaCrashItem}. |
| */ |
| @Override |
| public JavaCrashItem parse(List<String> lines) { |
| JavaCrashItem jc = null; |
| StringBuilder stack = new StringBuilder(); |
| StringBuilder message = new StringBuilder(); |
| boolean inMessage = false; |
| boolean inCausedBy = false; |
| boolean inStack = false; |
| |
| for (String line : lines) { |
| if (line.contains(BEGIN_MARKER)) { |
| inMessage = false; |
| inCausedBy = false; |
| inStack = false; |
| stack = new StringBuilder(); |
| message = new StringBuilder(); |
| jc = null; |
| continue; |
| } |
| if (line.contains(END_MARKER)) { |
| break; |
| } |
| if (!inStack) { |
| Matcher exceptionMatch = EXCEPTION.matcher(line); |
| if (exceptionMatch.matches()) { |
| inMessage = true; |
| inStack = true; |
| |
| jc = new JavaCrashItem(); |
| jc.setException(exceptionMatch.group(1)); |
| if (exceptionMatch.group(3) != null) { |
| message.append(exceptionMatch.group(3)); |
| } |
| } |
| } else { |
| // Match: Caused by: java.lang.Exception |
| Matcher causedByMatch = CAUSEDBY.matcher(line); |
| if (causedByMatch.matches()) { |
| inMessage = false; |
| inCausedBy = true; |
| } |
| |
| // Match: \tat class.method(Class.java:1) |
| Matcher atMatch = AT.matcher(line); |
| if (atMatch.matches()) { |
| inMessage = false; |
| inCausedBy = false; |
| } |
| |
| if (!causedByMatch.matches() && !atMatch.matches()) { |
| if (inMessage) { |
| message.append("\n"); |
| message.append(line); |
| } |
| if (!inMessage && !inCausedBy) { |
| addMessageStack(jc, message.toString(), stack.toString()); |
| return jc; |
| } |
| } |
| } |
| |
| if (inStack) { |
| stack.append(line); |
| stack.append("\n"); |
| } |
| } |
| |
| addMessageStack(jc, message.toString(), stack.toString()); |
| return jc; |
| } |
| |
| /** |
| * Adds the message and stack to the {@link JavaCrashItem}. |
| */ |
| private void addMessageStack(JavaCrashItem jc, String message, String stack) { |
| if (jc != null) { |
| if (message.length() > 0) { |
| jc.setMessage(message); |
| } |
| jc.setStack(stack.trim()); |
| } |
| } |
| } |
| |