1 /* 2 * Copyright 2007 ZXing authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.zxing; 18 19 /** 20 * The general exception class throw when something goes wrong during decoding of a barcode. 21 * This includes, but is not limited to, failing checksums / error correction algorithms, being 22 * unable to locate finder timing patterns, and so on. 23 * 24 * @author Sean Owen 25 */ 26 public abstract class ReaderException extends Exception { 27 28 // disable stack traces when not running inside test units 29 protected static boolean isStackTrace = 30 System.getProperty("surefire.test.class.path") != null; 31 protected static final StackTraceElement[] NO_TRACE = new StackTraceElement[0]; 32 ReaderException()33 ReaderException() { 34 // do nothing 35 } 36 ReaderException(Throwable cause)37 ReaderException(Throwable cause) { 38 super(cause); 39 } 40 41 // Prevent stack traces from being taken 42 @Override fillInStackTrace()43 public final synchronized Throwable fillInStackTrace() { 44 return null; 45 } 46 47 /** 48 * For testing only. Controls whether library exception classes include stack traces or not. 49 * Defaults to false, unless running in the project's unit testing harness. 50 * 51 * @param enabled if true, enables stack traces in library exception classes 52 * @since 3.5.0 53 */ setStackTrace(boolean enabled)54 public static void setStackTrace(boolean enabled) { 55 isStackTrace = enabled; 56 } 57 58 } 59