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*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/* @test
* @bug 4417152 4481572 6248930 6725399 6884800
* @summary Test Channels basic functionality
*/
import java.io.*;
import java.nio.*;
import java.nio.charset.*;
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();
}
static void failNpeExpected() {
throw new RuntimeException("Did not get the expected NullPointerException.");
}
private static void test() throws Exception {
//Test if methods of Channels throw NPE with null argument(s)
try {
Channels.newInputStream((ReadableByteChannel)null);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newOutputStream((WritableByteChannel)null);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
ReadableByteChannel channel = Channels.newChannel((InputStream)null);
failNpeExpected();
} catch (NullPointerException ne) {} // OK. As expected.
try {
WritableByteChannel channel = Channels.newChannel((OutputStream)null);
failNpeExpected();
} catch (NullPointerException ne) {} // OK. As expected.
WritableByteChannel wbc = new WritableByteChannel() {
public int write(ByteBuffer src) { return 0; }
public void close() throws IOException { }
public boolean isOpen() { return true; }
};
ReadableByteChannel rbc = new ReadableByteChannel() {
public int read(ByteBuffer dst) { return 0; }
public void close() {}
public boolean isOpen() { return true; }
};
try {
Channels.newReader((ReadableByteChannel)null,
Charset.defaultCharset().newDecoder(),
-1);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newReader(rbc, (CharsetDecoder)null, -1);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newReader((ReadableByteChannel)null,
Charset.defaultCharset().name());
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newReader(rbc, null);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newReader(null, null);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter((WritableByteChannel)null,
Charset.defaultCharset().newEncoder(),
-1);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter(null, null, -1);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter(wbc, null, -1);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter((WritableByteChannel)null,
Charset.defaultCharset().name());
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter(wbc, null);
failNpeExpected();
} catch (NullPointerException npe) {}
try {
Channels.newWriter(null, null);
failNpeExpected();
} catch (NullPointerException npe) {}
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();
InputStream is = Channels.newInputStream(fc);
int messageSize = message.length() * ITERATIONS * 3 + 1;
byte bb[] = new byte[messageSize];
int bytesRead = 0;
int totalRead = 0;
while (bytesRead != -1) {
totalRead += bytesRead;
long rem = Math.min(fc.size() - totalRead, (long)Integer.MAX_VALUE);
if (is.available() != (int)rem)
throw new RuntimeException("available not useful or not maximally useful");
bytesRead = is.read(bb, totalRead, messageSize - totalRead);
}
if (is.available() != 0)
throw new RuntimeException("available() should return 0 at EOF");
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);
}
}