1 /*

     2  * @test

     3  * @summary Makes sure that JLayer is synchronizable

     4  * @author Alexander Potochkin

     5  * @run main SerializationTest

     6  */

     7 

     8 import javax.swing.*;

     9 import javax.swing.plaf.LayerUI;

    10 import java.io.ByteArrayInputStream;

    11 import java.io.ObjectOutputStream;

    12 import java.io.ObjectInputStream;

    13 import java.io.ByteArrayOutputStream;

    14 

    15 public class SerializationTest {

    16 

    17     public static void main(String[] args) throws Exception {

    18         ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

    19         ObjectOutputStream outputStream = new ObjectOutputStream(byteArrayOutputStream);

    20 

    21         JLayer<JButton> layer = new JLayer<JButton>(new JButton("Hello"));

    22 

    23         layer.setUI(new TestLayerUI<JButton>());

    24 

    25         outputStream.writeObject(layer);

    26         outputStream.flush();

    27 

    28         ByteArrayInputStream byteArrayInputStream =

    29                         new ByteArrayInputStream(byteArrayOutputStream.toByteArray());

    30         ObjectInputStream inputStream = new ObjectInputStream(byteArrayInputStream);

    31 

    32         JLayer newLayer = (JLayer) inputStream.readObject();

    33 

    34         if (newLayer.getLayout() == null) {

    35             throw new RuntimeException("JLayer's layout is null");

    36         }

    37         if (newLayer.getGlassPane() == null) {

    38             throw new RuntimeException("JLayer's glassPane is null");

    39         }

    40         if (newLayer.getUI().getClass() != layer.getUI().getClass()) {

    41             throw new RuntimeException("Different UIs");

    42         }

    43         if (newLayer.getView().getClass() != layer.getView().getClass()) {

    44             throw new RuntimeException("Different Views");

    45         }

    46     }

    47 

    48     static class TestLayerUI<V extends JComponent> extends LayerUI<V> {

    49         public String toString() {

    50             return "TestLayerUI";

    51         }

    52     }

    53 }