/*
* Copyright 2001-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/* @test
* @bug 4417152 4481572 6248930
* @summary Test Channels basic functionality
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class Basic {
static String message;
static String encoding;
static File blah;
static int ITERATIONS = 500;
public static void main(String[] args) throws Exception {
message = "ascii data for a test";
encoding = "ISO-8859-1";
test();
message = "\ucafe\ubabe\ucafe\ubabe\ucafe\ubabe";
encoding = "UTF-8";
test();
}
private static void test() throws Exception {
try {
ReadableByteChannel channel = Channels.newChannel((InputStream)null);
throw new RuntimeException("Did not get the expected NullPointerException.");
} catch (NullPointerException ne) {
// OK. As expected.
}
try {
WritableByteChannel channel = Channels.newChannel((OutputStream)null);
throw new RuntimeException("Did not get the expected NullPointerException.");
} catch (NullPointerException ne) {
// OK. As expected.
}
try {
blah = File.createTempFile("blah", null);
testNewOutputStream(blah);
readAndCheck(blah);
blah.delete();
writeOut(blah, ITERATIONS);
testNewInputStream(blah);
blah.delete();
testNewChannelOut(blah);
readAndCheck(blah);
blah.delete();
writeOut(blah, ITERATIONS);
testNewChannelIn(blah);
test4481572(blah);
blah.delete();
testNewWriter(blah);
readAndCheck(blah);
blah.delete();
writeOut(blah, ITERATIONS);
testNewReader(blah);
} finally {
blah.delete();
}
}
private static void readAndCheck(File blah) throws Exception {
FileInputStream fis = new FileInputStream(blah);
int messageSize = message.length() * ITERATIONS * 3 + 1;
byte bb[] = new byte[messageSize];
int bytesRead = 0;
int totalRead = 0;
while (bytesRead != -1) {
totalRead += bytesRead;
bytesRead = fis.read(bb, totalRead, messageSize - totalRead);
}
String result = new String(bb, 0, totalRead, encoding);
int len = message.length();
for (int i=0; i<ITERATIONS; i++) {
String segment = result.substring(i++ * len, i * len);
if (!segment.equals(message))
throw new RuntimeException("Test failed");
}
fis.close();
}
private static void writeOut(File blah, int limit) throws Exception {
FileOutputStream fos = new FileOutputStream(blah);
for (int i=0; i<limit; i++)
fos.write(message.getBytes(encoding));
fos.close();
}
private static void testNewOutputStream(File blah) throws Exception {
FileOutputStream fos = new FileOutputStream(blah);
FileChannel fc = fos.getChannel();
WritableByteChannel wbc = (WritableByteChannel)fc;
OutputStream os = Channels.newOutputStream(wbc);
for (int i=0; i<ITERATIONS; i++)
os.write(message.getBytes(encoding));
os.close();
fos.close();
}
private static void testNewInputStream(File blah) throws Exception {
FileInputStream fis = new FileInputStream(blah);
FileChannel fc = fis.getChannel();
ReadableByteChannel rbc = (ReadableByteChannel)fc;
InputStream is = Channels.newInputStream(rbc);
int messageSize = message.length() * ITERATIONS * 3 + 1;
byte bb[] = new byte[messageSize];
int bytesRead = 0;
int totalRead = 0;
while (bytesRead != -1) {
totalRead += bytesRead;
bytesRead = is.read(bb, totalRead, messageSize - totalRead);
}
String result = new String(bb, 0, totalRead, encoding);
int len = message.length();
for (int i=0; i<ITERATIONS; i++) {
String segment = result.substring(i++ * len, i * len);
if (!segment.equals(message))
throw new RuntimeException("Test failed");
}
is.close();
fis.close();
}
private static void testNewChannelOut(File blah) throws Exception {
ExtendedFileOutputStream fos = new ExtendedFileOutputStream(blah);
WritableByteChannel wbc = Channels.newChannel(fos);
for (int i=0; i<ITERATIONS; i++)
wbc.write(ByteBuffer.wrap(message.getBytes(encoding)));
wbc.close();
fos.close();
}
private static void testNewChannelIn(File blah) throws Exception {
ExtendedFileInputStream fis = new ExtendedFileInputStream(blah);
ReadableByteChannel rbc = Channels.newChannel(fis);
int messageSize = message.length() * ITERATIONS * 3;
byte data[] = new byte[messageSize+1];
ByteBuffer bb = ByteBuffer.wrap(data);
int bytesRead = 0;
int totalRead = 0;
while (bytesRead != -1) {
totalRead += bytesRead;
bytesRead = rbc.read(bb);
}
String result = new String(data, 0, totalRead, encoding);
int len = message.length();
for (int i=0; i<ITERATIONS; i++) {
String segment = result.substring(i++ * len, i * len);
if (!segment.equals(message))
throw new RuntimeException("Test failed");
}
rbc.close();
fis.close();
}
// Causes BufferOverflowException if bug 4481572 is present.
private static void test4481572(File blah) throws Exception {
ExtendedFileInputStream fis = new ExtendedFileInputStream(blah);
ReadableByteChannel rbc = Channels.newChannel(fis);
byte data[] = new byte[9000];
ByteBuffer bb = ByteBuffer.wrap(data);
int bytesRead = 1;
int totalRead = 0;
while (bytesRead > 0) {
totalRead += bytesRead;
bytesRead = rbc.read(bb);
}
rbc.close();
fis.close();
}
private static void testNewWriter(File blah) throws Exception {
FileOutputStream fos = new FileOutputStream(blah);
WritableByteChannel wbc = (WritableByteChannel)fos.getChannel();
Writer w = Channels.newWriter(wbc, encoding);
char data[] = new char[40];
message.getChars(0, message.length(), data, 0);
for (int i=0; i<ITERATIONS; i++)
w.write(data, 0, message.length());
w.flush();
w.close();
fos.close();
}
private static void testNewReader(File blah) throws Exception {
FileInputStream fis = new FileInputStream(blah);
ReadableByteChannel rbc = (ReadableByteChannel)fis.getChannel();
Reader r = Channels.newReader(rbc, encoding);
int messageSize = message.length() * ITERATIONS;
char data[] = new char[messageSize];
int totalRead = 0;
int charsRead = 0;
while (totalRead < messageSize) {
totalRead += charsRead;
charsRead = r.read(data, totalRead, messageSize - totalRead);
}
String result = new String(data, 0, totalRead);
int len = message.length();
for (int i=0; i<ITERATIONS; i++) {
String segment = result.substring(i++ * len, i * len);
if (!segment.equals(message))
throw new RuntimeException("Test failed");
}
r.close();
fis.close();
}
}
class ExtendedFileInputStream extends java.io.FileInputStream {
ExtendedFileInputStream(File file) throws FileNotFoundException {
super(file);
}
}
class ExtendedFileOutputStream extends java.io.FileOutputStream {
ExtendedFileOutputStream(File file) throws FileNotFoundException {
super(file);
}
}