Impossible to catch exception

On 20/07/2011 09:57, Jens [dot] Tinz [at] dlr [dot] de wrote:
> I've ported the code to Java and it shows the same behavior.
> I'll post this to the Oracle bug database.

Puzzling, indeed. NotSerializableException is a good old Exception, but even catching a
Throwable doesn't get it.

Hello!

I've ported the code to Java and it shows the same behavior.

On 7/20/2011 2:57 AM, Jens [dot] Tinz [at] dlr [dot] de wrote:
> Hello!
>
> I've ported the code to Java and it shows the same behavior.
> I'll post this to the Oracle bug database.
>
>
> Regards,
> Jens
>
>
> // java source --------------------------------------------------------------------------
>
> package test;
>
> import java.awt.Toolkit;
> import java.awt.datatransfer.*;
>
> class Test {
> public static DataFlavor flavor = new DataFlavor(Test[].class, "Test Array");
> }
>
> class ClipboardData implements Transferable {
> Test data = null;
>
> ClipboardData(Test pdata) {
> data = pdata;
> }
>
> public DataFlavor[] getTransferDataFlavors() {
> return new DataFlavor[] { Test.flavor };
> }
>
> public boolean isDataFlavorSupported(DataFlavor flavor) {
> return flavor == Test.flavor;
> }
>
> public Object getTransferData(DataFlavor flavor) {
> return data;
> }
> }
>
> public class Main {
> public static void main(String[] args) {
> Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
> ClipboardData data = new ClipboardData(new Test());
> try {
> clipboard.setContents(data, null);
> System.out.println("exception ignored");
> } catch(Exception e) {
> System.out.println("exception caught");
> }
> }
> }
>
> // output from java source --------------------------------------------------------------------------
>
> java.io.NotSerializableException: test.Test
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
> at sun.awt.datatransfer.DataTransferer.translateTransferable(DataTransferer.java:1399)
> at sun.awt.windows.WDataTransferer.translateTransferable(WDataTransferer.java:189)
> at sun.awt.windows.WClipboard.setContentsNative(WClipboard.java:87)
> at sun.awt.datatransfer.SunClipboard.setContents(SunClipboard.java:110)
> at test.Main.main(Main.java:35)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> exception ignored
>
> ________________________________
> From: scala-language [at] googlegroups [dot] com [scala-language [at] googlegroups [dot] com] on behalf of Jens [dot] Tinz [at] dlr [dot] de [Jens [dot] Tinz [at] dlr [dot] de]
> Sent: Tuesday, July 19, 2011 4:26 PM
> To: scala-language [at] googlegroups [dot] com
> Subject: [scala-language] Impossible to catch exception
>
> Hello!
>
> Using scala 2.9.0.1 and JDK1.6.0_23, the code posted below causes a java.io.NotSerializableException.
> However, the line following the one causing the exception is executed and the catch-block is ignored.
>
> Am I overlooking something or is there a serious bug in scala or Java?
>
>
> Thank you,
> Jens
>
>
> // source --------------------------------------------------------------------------
>
> package test
>
> import java.awt.Toolkit
> import java.awt.datatransfer.{Transferable, DataFlavor}
>
> class Test
>
> object Test {
> val flavor = new DataFlavor(classOf[Array[Test]], "Test Array")
> }
>
> class ClipboardData(data: Test) extends Transferable {
> override def getTransferDataFlavors : Array[DataFlavor] =
> Array(Test.flavor)
>
> override def isDataFlavorSupported(flavor: DataFlavor) : Boolean =
> flavor == Test.flavor
>
> override def getTransferData(flavor: DataFlavor) : AnyRef =
> data
> }
>
> object Main {
> def main(args: Array[String]) {
> val clipboard = Toolkit.getDefaultToolkit.getSystemClipboard
> val data = new ClipboardData(new Test)
> try {
> clipboard.setContents(data, null)
> println("exception ignored")
> } catch {
> case _ => println("exception caught")
> }
> }
> }
>
> // output --------------------------------------------------------------------------
>
> java.io.NotSerializableException: test.Test
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
> at sun.awt.datatransfer.DataTransferer.translateTransferable(DataTransferer.java:1217)
> at sun.awt.windows.WDataTransferer.translateTransferable(WDataTransferer.java:163)
> at sun.awt.windows.WClipboard.setContentsNative(WClipboard.java:73)
> at sun.awt.datatransfer.SunClipboard.setContents(SunClipboard.java:93)
> at test.Main$.main(Main.scala:28)
> at test.Main.main(Main.scala)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
> exception ignored
>

Maybe they have mislabeled a runtime Error as an Exception? Last time I
looked, the way to handle an anticipated Error was to spawn a Thread and
attempt the code. The Thread dies on failure, but the rest of your
program survives.

Just a guess.

Bob (ishmal)