author | darcy |
Sun, 14 Nov 2010 07:22:39 -0800 | |
changeset 7186 | 7f5fe8985263 |
parent 5506 | 202f599c92aa |
child 9513 | 1079ae7ada52 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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import java.io.*; |
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import java.util.*; |
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/* |
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* @test |
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* @bug 4202914 4363318 6991528 |
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* @summary Basic test of serialization of stack trace information |
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* @author Josh Bloch |
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*/ |
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public class StackTraceSerialization { |
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public static void main(String args[]) throws Exception { |
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testWithSetStackTrace(); |
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testWithFillInStackTrace(); |
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} |
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private static void testWithSetStackTrace() throws Exception { |
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Throwable t = new Throwable(); |
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t.setStackTrace(new StackTraceElement[] |
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{new StackTraceElement("foo", "bar", "baz", -1)}); |
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if (!equal(t, reconstitute(t))) |
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throw new Exception("Unequal Throwables with set stacktrace"); |
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} |
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private static void assertEmptyStackTrace(Throwable t) { |
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if (t.getStackTrace().length != 0) |
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throw new AssertionError("Nonempty stacktrace."); |
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} |
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private static void testWithFillInStackTrace() throws Exception { |
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Throwable original = null; |
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try { |
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a(); |
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} catch(HighLevelException e) { |
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original = e; |
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} |
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if (!equal(original, reconstitute(original))) |
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throw new Exception("Unequal Throwables with filled-in stacktrace"); |
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} |
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/** |
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* Serialize the argument and return the deserialized result. |
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*/ |
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private static Throwable reconstitute(Throwable t) throws Exception { |
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Throwable result = null; |
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try(ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
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ObjectOutputStream out = new ObjectOutputStream(bout)) { |
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out.writeObject(t); |
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out.flush(); |
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try(ByteArrayInputStream bin = |
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new ByteArrayInputStream(bout.toByteArray()); |
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ObjectInputStream in = new ObjectInputStream(bin)) { |
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result = (Throwable) in.readObject(); |
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} |
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} |
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return result; |
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} |
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/** |
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* Returns true if e1 and e2 have equal stack traces and their |
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* causes are recursively equal (by the same definition) and their |
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* suppressed exception information is equals. Returns false or |
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* throws NullPointerExeption otherwise. |
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*/ |
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private static boolean equal(Throwable t1, Throwable t2) { |
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return t1==t2 || |
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(Arrays.equals(t1.getStackTrace(), t2.getStackTrace()) && |
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equal(t1.getCause(), t2.getCause()) && |
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Objects.equals(t1.getSuppressed(), t2.getSuppressed())); |
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} |
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static void a() throws HighLevelException { |
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try { |
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b(); |
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} catch(MidLevelException e) { |
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throw new HighLevelException(e); |
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} |
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} |
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static void b() throws MidLevelException { |
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c(); |
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} |
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static void c() throws MidLevelException { |
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try { |
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d(); |
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} catch(LowLevelException e) { |
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throw new MidLevelException(e); |
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} |
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} |
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static void d() throws LowLevelException { |
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e(); |
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} |
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static void e() throws LowLevelException { |
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throw new LowLevelException(); |
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} |
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private static final String OUR_CLASS = StackTraceSerialization.class.getName(); |
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private static final String OUR_FILE_NAME = "StackTraceSerialization.java"; |
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private static void check(StackTraceElement e, String methodName, int n) { |
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if (!e.getClassName().equals(OUR_CLASS)) |
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throw new RuntimeException("Class: " + e); |
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if (!e.getMethodName().equals(methodName)) |
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throw new RuntimeException("Method name: " + e); |
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if (!e.getFileName().equals(OUR_FILE_NAME)) |
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throw new RuntimeException("File name: " + e); |
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if (e.getLineNumber() != n) |
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throw new RuntimeException("Line number: " + e); |
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} |
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} |
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class HighLevelException extends Exception { |
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HighLevelException(Throwable cause) { super(cause); } |
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} |
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class MidLevelException extends Exception { |
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MidLevelException(Throwable cause) { super(cause); } |
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} |
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class LowLevelException extends Exception { |
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} |