/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.*;
/**
* @test
* @bug 7015589 8054565
* @summary Test that buffering streams are considered closed even when the
* close or flush from the underlying stream fails.
*/
public class FailingFlushAndClose {
static int failed;
static void fail(String msg) {
System.err.println("FAIL: " + msg);
failed++;
}
static void failWithIOE(String msg) throws IOException {
fail(msg);
throw new IOException(msg);
}
static class FailingCloseInputStream extends InputStream {
boolean closed;
@Override
public int read()throws IOException {
if (closed)
failWithIOE("input stream is closed");
return 1;
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
throw new IOException("close failed");
}
}
}
static class FailingCloseOutputStream extends OutputStream {
boolean closed;
@Override
public void write(int b) throws IOException {
if (closed)
failWithIOE("output stream is closed");
}
@Override
public void flush() throws IOException {
if (closed)
failWithIOE("output stream is closed");
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
throw new IOException("close failed");
}
}
}
static class FailingFlushOutputStream extends OutputStream {
boolean closed;
@Override
public void write(int b) throws IOException {
if (closed)
failWithIOE("output stream is closed");
}
@Override
public void flush() throws IOException {
if (closed) {
failWithIOE("output stream is closed");
} else {
throw new IOException("flush failed");
}
}
@Override
public void close() throws IOException {
closed = true;
}
}
static class FailingCloseReader extends Reader {
boolean closed;
@Override
public int read(char[] cbuf, int off, int len) throws IOException {
if (closed)
failWithIOE("reader is closed");
return 1;
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
throw new IOException("close failed");
}
}
}
static class FailingCloseWriter extends Writer {
boolean closed;
@Override
public void write(char[] cbuf, int off, int len) throws IOException {
if (closed)
failWithIOE("writer is closed");
}
@Override
public void flush() throws IOException {
if (closed)
failWithIOE("writer is closed");
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
throw new IOException("close failed");
}
}
}
static class FailingFlushWriter extends Writer {
boolean closed;
@Override
public void write(char[] cbuf, int off, int len) throws IOException {
if (closed)
failWithIOE("writer is closed");
}
@Override
public void flush() throws IOException {
if (closed) {
failWithIOE("writer is closed");
} else {
throw new IOException("flush failed");
}
}
@Override
public void close() throws IOException {
if (!closed) {
closed = true;
throw new IOException("close failed");
}
}
}
static InputStream testFailingClose(InputStream in) throws IOException {
System.out.println(in.getClass());
in.read(new byte[100]);
try {
in.close();
fail("close did not fail");
} catch (IOException expected) { }
try {
in.read(new byte[100]);
fail("read did not fail");
} catch (IOException expected) { }
return in;
}
static OutputStream testFailingClose(OutputStream out) throws IOException {
System.out.println(out.getClass());
out.write(1);
try {
out.close();
fail("close did not fail");
} catch (IOException expected) { }
try {
out.write(1);
if (!(out instanceof BufferedOutputStream))
fail("write did not fail");
} catch (IOException expected) { }
return out;
}
static OutputStream testFailingFlush(OutputStream out) throws IOException {
System.out.println(out.getClass());
out.write(1);
try {
out.flush();
fail("flush did not fail");
} catch (IOException expected) { }
if (out instanceof BufferedOutputStream) {
out.write(1);
try {
out.close();
fail("close did not fail");
} catch (IOException expected) { }
}
return out;
}
static void closeAgain(InputStream in) throws IOException {
// assert the given stream should already be closed.
try {
in.close();
} catch (IOException expected) {
fail("unexpected IOException from subsequent close");
}
}
static void closeAgain(OutputStream out) throws IOException {
// assert the given stream should already be closed.
try {
out.close();
} catch (IOException expected) {
fail("unexpected IOException from subsequent close");
}
}
static Reader testFailingClose(Reader r) throws IOException {
System.out.println(r.getClass());
r.read(new char[100]);
try {
r.close();
fail("close did not fail");
} catch (IOException expected) { }
try {
r.read(new char[100]);
fail("read did not fail");
} catch (IOException expected) { }
return r;
}
static Writer testFailingClose(Writer w) throws IOException {
System.out.println(w.getClass());
w.write("message");
try {
w.close();
fail("close did not fail");
} catch (IOException expected) { }
try {
w.write("another message");
fail("write did not fail");
} catch (IOException expected) { }
return w;
}
static Writer testFailingFlush(Writer w) throws IOException {
System.out.println(w.getClass());
w.write("message");
try {
w.flush();
fail("flush did not fail");
} catch (IOException expected) { }
if (w instanceof BufferedWriter) {
// assume this message will be buffered
w.write("another message");
try {
w.close();
fail("close did not fail");
} catch (IOException expected) { }
}
return w;
}
static Reader closeAgain(Reader r) throws IOException {
// assert the given stream should already be closed.
try {
r.close();
} catch (IOException expected) {
fail("unexpected IOException from subsequent close");
}
return r;
}
static Writer closeAgain(Writer w) throws IOException {
// assert the given stream should already be closed.
try {
w.close();
} catch (IOException expected) {
fail("unexpected IOException from subsequent close");
}
return w;
}
public static void main(String[] args) throws IOException {
closeAgain(testFailingClose(new BufferedInputStream(new FailingCloseInputStream())));
closeAgain(testFailingClose(new BufferedOutputStream(new FailingCloseOutputStream())));
closeAgain(testFailingClose(new BufferedReader(new FailingCloseReader())));
closeAgain(testFailingClose(new BufferedWriter(new FailingCloseWriter())));
closeAgain(testFailingFlush(new BufferedOutputStream(new FailingFlushOutputStream())));
closeAgain(testFailingFlush(new BufferedWriter(new FailingFlushWriter())));
if (failed > 0)
throw new RuntimeException(failed + " test(s) failed - see log for details");
}
}