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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 4655996
* @summary tests that getting the system clipboard contents doesn't cause
* IOException if there is no clipboard owner or the owner doesn't
* export any target types
* @key headful
* @library /test/lib
* @run main NoOwnerNoTargetsTest
*/
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.awt.datatransfer.UnsupportedFlavorException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
public class NoOwnerNoTargetsTest implements ClipboardOwner {
final Clipboard clipboard =
Toolkit.getDefaultToolkit().getSystemClipboard();
public static final int CLIPBOARD_DELAY = 1000;
public static void main(String[] args) throws Exception {
if (args.length > 0) {
NoOwnerNoTargetsTest test = new NoOwnerNoTargetsTest();
test.execute();
return;
}
new NoOwnerNoTargetsTest().start();
}
public void execute() {
final ClipboardOwner clipboardOwner = new ClipboardOwner() {
public void lostOwnership(Clipboard clip,
Transferable contents) {
System.exit(0);
}
};
final Transferable emptyTransferable = new Transferable() {
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[0];
}
public boolean isDataFlavorSupported(DataFlavor df) {
return false;
}
public Object getTransferData(DataFlavor df)
throws UnsupportedFlavorException {
throw new UnsupportedFlavorException(df);
}
};
clipboard.setContents(emptyTransferable, clipboardOwner);
final Object o = new Object();
synchronized (o) {
try {
o.wait();
} catch (InterruptedException ie) {
ie.printStackTrace();
}
}
}
public void start() throws Exception {
clipboard.getContents(null);
Transferable transferable = new StringSelection("TEXT");
clipboard.setContents(transferable, this);
ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(
NoOwnerNoTargetsTest.class.getName(),
"child"
);
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");
}
outputAnalyzer.shouldHaveExitValue(0);
}
public void lostOwnership(Clipboard clip, Transferable contents) {
final Transferable transferable = new StringSelection("TEXT");
final Runnable r = () -> {
try {
Thread.sleep(CLIPBOARD_DELAY);
} catch (InterruptedException e) {
e.printStackTrace();
}
clipboard.getContents(null);
clipboard.setContents(transferable, null);
};
final Thread t = new Thread(r);
t.start();
}
}
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