test/jdk/java/awt/Clipboard/LostOwnershipChainTest/PrivateClipboardTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
  @test
  @bug 4683804
  @summary Tests that in ClipboardOwner.lostOwnership() Clipboard.getContents()
           returns actual contents of the clipboard and Clipboard.setContents()
           can set contents of the clipboard and its owner. The clipboard is
           a private clipboard.
*/

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;

public class PrivateClipboardTest  {

    public static void main(String[] args) {
        PrivateClipboardOwner.run();

        if (PrivateClipboardOwner.failed) {
            throw new RuntimeException("test failed: can not get actual " +
            "contents of the clipboard or set owner of the clipboard");
        } else {
            System.err.println("test passed");
        }
    }
}

class PrivateClipboardOwner implements ClipboardOwner {
    static boolean failed;

    private static final Object LOCK = new Object();

    private static final int CHAIN_LENGTH = 5;
    private final static Clipboard clipboard =
            new Clipboard("PrivateClipboard");

    private int m, id;

    public PrivateClipboardOwner(int m) { this.m = m; id = m; }

    public void lostOwnership(Clipboard cb, Transferable contents) {
        System.err.println(id + " lost clipboard ownership");

        Transferable t = cb.getContents(null);
        String msg = null;
        try {
            msg = (String)t.getTransferData(DataFlavor.stringFlavor);
        } catch (Exception e) {
             System.err.println(id + " can't getTransferData: " + e);
        }
        System.err.println(id + " Clipboard.getContents(): " + msg);
        if ( ! msg.equals( "" + (m+1) ) ) {
            failed = true;
            System.err.println(
                    "Clipboard.getContents() returned incorrect contents!");
        }

        m += 2;
        if (m <= CHAIN_LENGTH) {
            System.err.println(id + " Clipboard.setContents(): " + m);
            cb.setContents(new StringSelection(m + ""), this);
        }

        synchronized (LOCK) {
            if (m > CHAIN_LENGTH) {
                LOCK.notifyAll();
            }
        }
    }

    public static void run() {
        PrivateClipboardOwner cbo1 = new PrivateClipboardOwner(0);
        System.err.println(cbo1.m + " Clipboard.setContents(): " + cbo1.m);
        clipboard.setContents(new StringSelection(cbo1.m + ""), cbo1);

        PrivateClipboardOwner cbo2 = new PrivateClipboardOwner(1);

        synchronized (LOCK) {
            System.err.println(cbo2.m + " Clipboard.setContents(): " + cbo2.m);
            clipboard.setContents(new StringSelection(cbo2.m + ""), cbo2);
            try {
                LOCK.wait();
            } catch (InterruptedException exc) {
                exc.printStackTrace();
            }
        }

        if (cbo1.m < CHAIN_LENGTH) {
            failed = true;
            System.err.println("chain of calls of lostOwnership() broken!");
        }
    }
}