8027152: Regression: test closed/java/awt/Serialize/NullSerializationTest/NullSerializationTest.html fails since JDK 8 b112

Reviewed-by: art, serb

jdk/src/share/classes/java/awt/Window.java

@@ -2976,11 +2976,11 @@ public class Window extends Container implements Accessible {
 
         addToWindowList();
         initGC(null);
+        ownedWindowList = new Vector<>();
     }
 
     private void deserializeResources(ObjectInputStream s)
         throws ClassNotFoundException, IOException, HeadlessException {
-            ownedWindowList = new Vector<>();
 
             if (windowSerializedDataVersion < 2) {
                 // Translate old-style focus tracking to new model. For 1.4 and

jdk/test/java/awt/Window/OwnedWindowsSerialization/OwnedWindowsSerialization.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2013, 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.
+ */
+
+import sun.awt.SunToolkit;
+
+import javax.swing.*;
+import java.awt.*;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+/* @test
+ * @bug 8027152
+ * @summary Checks that ownedWindowList is serialized and deserialized properly and alwaysOnTop works after deserialization
+ * @author Petr Pchelko
+ * @run main OwnedWindowsSerialization
+ */
+public class OwnedWindowsSerialization {
+
+    private static final String TOP_FRAME_LABEL = "Top Frame";
+    private static final String DIALOG_LABEL = "Dialog";
+    private static final String SUBDIALOG_LABEL = "Subdialog";
+
+    private static volatile Frame topFrame;
+    private static volatile Dialog dialog;
+    private static volatile Dialog subDialog;
+
+    public static void main(String[] args) throws Exception {
+        SwingUtilities.invokeAndWait(() -> {
+            topFrame = new Frame(TOP_FRAME_LABEL);
+            topFrame.setAlwaysOnTop(true);
+            dialog = new Dialog(topFrame, DIALOG_LABEL);
+            subDialog = new Dialog(dialog, SUBDIALOG_LABEL);
+        });
+
+        ((SunToolkit) Toolkit.getDefaultToolkit()).realSync();
+
+        if (!topFrame.isAlwaysOnTop() || !dialog.isAlwaysOnTop() || !subDialog.isAlwaysOnTop()) {
+            throw new RuntimeException("TEST FAILED: AlwaysOnTop was not set properly");
+        }
+
+        //Serialize
+        byte[] serializedObject;
+        try (ByteArrayOutputStream bytes = new ByteArrayOutputStream();
+             ObjectOutputStream outputStream = new ObjectOutputStream(bytes)) {
+            outputStream.writeObject(topFrame);
+            outputStream.flush();
+            serializedObject = bytes.toByteArray();
+        }
+
+        if (serializedObject == null) {
+            throw new RuntimeException("FAILED: Serialized byte array in null");
+        }
+
+        //Deserialize
+        Frame deserializedFrame;
+        try (ObjectInputStream inputStream = new ObjectInputStream(new ByteArrayInputStream(serializedObject))) {
+            deserializedFrame = (Frame) inputStream.readObject();
+        }
+
+        //Check the state of the deserialized objects
+        if (!TOP_FRAME_LABEL.equals(deserializedFrame.getTitle())) {
+            throw new RuntimeException("FAILED: Top frame deserialized incorrectly");
+        }
+
+        if (!deserializedFrame.isAlwaysOnTop()) {
+            throw new RuntimeException("FAILED: Top frame alwaysOnTop not set after deserialization");
+        }
+
+        Window[] topOwnedWindows = topFrame.getOwnedWindows();
+        if (topOwnedWindows.length != 1 || !DIALOG_LABEL.equals(((Dialog) topOwnedWindows[0]).getTitle())) {
+            throw new RuntimeException("FAILED: Dialog deserialized incorrectly");
+        }
+
+        if (!topOwnedWindows[0].isAlwaysOnTop()) {
+            throw new RuntimeException("FAILED: Dialog alwaysOnTop not set after deserialization");
+        }
+
+        Window dialog = topOwnedWindows[0];
+        Window[] dialogOwnedWindows = dialog.getOwnedWindows();
+        if (dialogOwnedWindows.length != 1 || !SUBDIALOG_LABEL.equals(((Dialog) dialogOwnedWindows[0]).getTitle())) {
+            throw new RuntimeException("FAILED: Subdialog deserialized incorrectly");
+        }
+
+        if (!dialogOwnedWindows[0].isAlwaysOnTop()) {
+            throw new RuntimeException("FAILED: Subdialog alwaysOnTop not set after deserialization");
+        }
+    }
+}