/* * Copyright (c) 2000, 2023, 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 @key headful @bug 4187912 @summary Test that some incorrectly written DnD code cannot hang the app @run main NotReallySerializableTest */ import java.awt.Button; import java.awt.Cursor; import java.awt.Point; import java.awt.Toolkit; import java.awt.datatransfer.StringSelection; import java.awt.dnd.DnDConstants; import java.awt.dnd.DragGestureEvent; import java.awt.dnd.DragGestureListener; import java.awt.dnd.DragGestureRecognizer; import java.awt.dnd.DragSource; import java.awt.dnd.DragSourceAdapter; import java.awt.dnd.DragSourceContext; import java.awt.dnd.DropTarget; import java.awt.dnd.DropTargetAdapter; import java.awt.dnd.DropTargetDropEvent; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.Serializable; import java.util.ArrayList; public class NotReallySerializableTest { public static void main(String[] args) throws IOException { Toolkit tk = Toolkit.getDefaultToolkit(); DragGestureRecognizer dgr = tk.createDragGestureRecognizer (java.awt.dnd.MouseDragGestureRecognizer.class, DragSource.getDefaultDragSource(), new Button(), DnDConstants.ACTION_LINK, new TrickDragGestureListener()); DragGestureEvent dge = new DragGestureEvent (dgr, DnDConstants.ACTION_LINK, new Point(0, 0), new TrickList()); DragSourceContext dsc = new DragSourceContext(dge, Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR), null, null, new TrickTransferable(), new TrickDragSourceListener()); DropTarget dt = new DropTarget(new Button(), new TrickDropTargetListener()); ObjectOutputStream stream = new ObjectOutputStream (new OutputStream() { public void write(int b) {} }); stream.writeObject(dgr); stream.writeObject(dge); stream.writeObject(dsc); stream.writeObject(dt); System.out.println("test passed"); } } class TrickList extends ArrayList implements Serializable { Object trick = new Object(); TrickList() { add(trick); } } class TrickDragGestureListener implements DragGestureListener, Serializable { Object trick = new Object(); public void dragGestureRecognized(DragGestureEvent dge) {} } class TrickTransferable extends StringSelection implements Serializable { Object trick = new Object(); TrickTransferable() { super(""); } } class TrickDragSourceListener extends DragSourceAdapter implements Serializable { Object trick = new Object(); } class TrickDropTargetListener extends DropTargetAdapter implements Serializable { Object trick = new Object(); public void drop(DropTargetDropEvent dtde) {} }