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/*
* Copyright (c) 2002, 2025, 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.
*/
/*
* @test
* @bug 4558797
* @summary Tests that there is no data conversion failure when two applications
* exchange data via system clipboard
* @key headful
* @library /test/lib
* @run main NoDataConversionFailureTest
*/
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
public class NoDataConversionFailureTest {
public static void main(String[] args) throws Exception {
SystemClipboardOwner.run();
if (SystemClipboardOwner.failed) {
throw new RuntimeException("test failed: can not get transfer data");
} else {
System.err.println("test passed");
}
}
}
class SystemClipboardOwner implements ClipboardOwner {
static volatile boolean failed;
private static final Object LOCK = new Object();
private static final int CHAIN_LENGTH = 15;
private final static Clipboard clipboard =
Toolkit.getDefaultToolkit().getSystemClipboard();
private int m;
private final int id;
public SystemClipboardOwner(int m) { this.m = m; id = m; }
public void lostOwnership(Clipboard cb, Transferable contents) {
System.err.println(id + " lost clipboard ownership");
Transferable t = getClipboardContents(cb, null);
// for test passing if t.getTransferData() will throw an exception
String msg = String.valueOf(m + 1);
try {
msg = (String) t.getTransferData(DataFlavor.stringFlavor);
} catch (IOException e) {
failed = true;
System.err.println(id + " can't getTransferData: " + e);
} catch (Exception e) {
System.err.println(id + " can't getTransferData: " + e);
}
System.err.println(id + " Clipboard.getContents(): " + msg);
if (!msg.equals(String.valueOf(m + 1))) {
System.err.println("Clipboard.getContents() returned incorrect contents!");
}
m += 2;
if (m <= CHAIN_LENGTH) {
System.err.println(id + " Clipboard.setContents(): " + m);
setClipboardContents(cb, new StringSelection(m + ""), this);
}
if (m >= CHAIN_LENGTH) {
synchronized (LOCK) {
LOCK.notifyAll();
}
}
}
public static void run() throws Exception {
SystemClipboardOwner cbo1 = new SystemClipboardOwner(0);
System.err.println(cbo1.m + " Clipboard.setContents(): " + cbo1.m);
setClipboardContents(clipboard, new StringSelection(cbo1.m + ""),
cbo1);
ProcessBuilder pb = ProcessTools
.createTestJavaProcessBuilder(SystemClipboardOwner.class.getName());
Process process = ProcessTools.startProcess("Child", pb);
OutputAnalyzer outputAnalyzer = new OutputAnalyzer(process);
if (!process.waitFor(15, TimeUnit.SECONDS)) {
process.destroyForcibly();
throw new TimeoutException("Timed out waiting for Child");
}
if (cbo1.m < CHAIN_LENGTH) {
System.err.println("chain of calls of lostOwnership() broken!");
}
outputAnalyzer.shouldHaveExitValue(0);
}
public static void main(String[] args) throws InterruptedException {
SystemClipboardOwner cbo2 = new SystemClipboardOwner(1);
System.err.println(cbo2.m + " Clipboard.setContents(): " + cbo2.m);
synchronized (LOCK) {
setClipboardContents(clipboard, new StringSelection(cbo2.m + ""),
cbo2);
LOCK.wait();
}
}
private static void setClipboardContents(Clipboard cb,
Transferable contents,
ClipboardOwner owner) {
synchronized (cb) {
boolean set = false;
while (!set) {
try {
cb.setContents(contents, owner);
set = true;
} catch (IllegalStateException ise) {
try { Thread.sleep(100); }
catch (InterruptedException e) { e.printStackTrace(); }
}
}
}
}
private static Transferable getClipboardContents(Clipboard cb,
Object requestor) {
synchronized (cb) {
while (true) {
try {
Transferable t = cb.getContents(requestor);
return t;
} catch (IllegalStateException ise) {
try { Thread.sleep(100); }
catch (InterruptedException e) { e.printStackTrace(); }
}
}
}
}
}
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