| /* |
| * Copyright (C) 2017 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 android.os.strictmode; |
| |
| /** Root class for all StrictMode violations. */ |
| public abstract class Violation extends Throwable { |
| private int mHashCode; |
| private boolean mHashCodeValid; |
| |
| Violation(String message) { |
| super(message); |
| } |
| |
| @Override |
| public int hashCode() { |
| synchronized (this) { |
| if (mHashCodeValid) { |
| return mHashCode; |
| } |
| final String message = getMessage(); |
| final Throwable cause = getCause(); |
| int hashCode = message != null ? message.hashCode() : getClass().hashCode(); |
| hashCode = hashCode * 37 + calcStackTraceHashCode(getStackTrace()); |
| hashCode = hashCode * 37 + (cause != null ? cause.toString().hashCode() : 0); |
| mHashCodeValid = true; |
| return mHashCode = hashCode; |
| } |
| } |
| |
| @Override |
| public synchronized Throwable initCause(Throwable cause) { |
| mHashCodeValid = false; |
| return super.initCause(cause); |
| } |
| |
| @Override |
| public void setStackTrace(StackTraceElement[] stackTrace) { |
| super.setStackTrace(stackTrace); |
| synchronized (this) { |
| mHashCodeValid = false; |
| } |
| } |
| |
| @Override |
| public synchronized Throwable fillInStackTrace() { |
| mHashCodeValid = false; |
| return super.fillInStackTrace(); |
| } |
| |
| private static int calcStackTraceHashCode(final StackTraceElement[] stackTrace) { |
| int hashCode = 17; |
| if (stackTrace != null) { |
| for (int i = 0; i < stackTrace.length; i++) { |
| if (stackTrace[i] != null) { |
| hashCode = hashCode * 37 + stackTrace[i].hashCode(); |
| } |
| } |
| } |
| return hashCode; |
| } |
| } |