107 lines
2.8 KiB
Java
107 lines
2.8 KiB
Java
/*
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* Copyright 2007 Yusuke Yamamoto
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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 twitter4j;
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/**
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* @author Yusuke Yamamoto - yusuke at mac.com
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* @since Twitter4J 2.1.3
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*/
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final class ExceptionDiagnosis {
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int stackLineHash;
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int lineNumberHash;
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String hexString = "";
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Throwable th;
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ExceptionDiagnosis(final Throwable th) {
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this(th, new String[] {});
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}
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ExceptionDiagnosis(final Throwable th, final String[] inclusionFilter) {
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this.th = th;
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final StackTraceElement[] stackTrace = th.getStackTrace();
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stackLineHash = 0;
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lineNumberHash = 0;
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for (int i = stackTrace.length - 1; i >= 0; i--) {
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final StackTraceElement line = stackTrace[i];
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for (final String filter : inclusionFilter) {
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if (line.getClassName().startsWith(filter)) {
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final int hash = line.getClassName().hashCode() + line.getMethodName().hashCode();
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stackLineHash = 31 * stackLineHash + hash;
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lineNumberHash = 31 * lineNumberHash + line.getLineNumber();
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break;
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}
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}
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}
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hexString += toHexString(stackLineHash) + "-" + toHexString(lineNumberHash);
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if (th.getCause() != null) {
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hexString += " " + new ExceptionDiagnosis(th.getCause(), inclusionFilter).asHexString();
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}
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}
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@Override
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public boolean equals(final Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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final ExceptionDiagnosis that = (ExceptionDiagnosis) o;
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if (lineNumberHash != that.lineNumberHash) return false;
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if (stackLineHash != that.stackLineHash) return false;
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return true;
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}
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@Override
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public int hashCode() {
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int result = stackLineHash;
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result = 31 * result + lineNumberHash;
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return result;
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}
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@Override
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public String toString() {
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return "ExceptionDiagnosis{" + "stackLineHash=" + stackLineHash + ", lineNumberHash=" + lineNumberHash + '}';
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}
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private String toHexString(final int value) {
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final String str = "0000000" + Integer.toHexString(value);
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return str.substring(str.length() - 8, str.length());
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}
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String asHexString() {
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return hexString;
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}
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int getLineNumberHash() {
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return lineNumberHash;
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}
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String getLineNumberHashAsHex() {
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return toHexString(lineNumberHash);
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}
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int getStackLineHash() {
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return stackLineHash;
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}
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String getStackLineHashAsHex() {
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return toHexString(stackLineHash);
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}
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}
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