76 lines
2.3 KiB
Java
76 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.os.strictmode;
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/** Root class for all StrictMode violations. */
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public abstract class Violation extends Throwable {
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private int mHashCode;
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private boolean mHashCodeValid;
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Violation(String message) {
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super(message);
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}
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@Override
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public int hashCode() {
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synchronized (this) {
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if (mHashCodeValid) {
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return mHashCode;
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}
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final String message = getMessage();
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final Throwable cause = getCause();
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int hashCode = message != null ? message.hashCode() : getClass().hashCode();
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hashCode = hashCode * 37 + calcStackTraceHashCode(getStackTrace());
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hashCode = hashCode * 37 + (cause != null ? cause.toString().hashCode() : 0);
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mHashCodeValid = true;
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return mHashCode = hashCode;
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}
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}
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@Override
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public synchronized Throwable initCause(Throwable cause) {
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mHashCodeValid = false;
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return super.initCause(cause);
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}
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@Override
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public void setStackTrace(StackTraceElement[] stackTrace) {
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super.setStackTrace(stackTrace);
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synchronized (this) {
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mHashCodeValid = false;
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}
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}
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@Override
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public synchronized Throwable fillInStackTrace() {
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mHashCodeValid = false;
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return super.fillInStackTrace();
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}
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private static int calcStackTraceHashCode(final StackTraceElement[] stackTrace) {
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int hashCode = 17;
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if (stackTrace != null) {
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for (int i = 0; i < stackTrace.length; i++) {
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if (stackTrace[i] != null) {
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hashCode = hashCode * 37 + stackTrace[i].hashCode();
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}
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}
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}
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return hashCode;
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}
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}
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