[Bug 1058] New: XFileOpenService openMultiFileDialog ClassCastException, FileContents[] instead of FileContents

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1058

          Priority: P3
            Bug ID: 1058
                CC: unassigned at icedtea.classpath.org
          Assignee: omajid at redhat.com
           Summary: XFileOpenService openMultiFileDialog
                    ClassCastException, FileContents[] instead of
                    FileContents
          Severity: normal
    Classification: Unclassified
                OS: Linux
          Reporter: stephan.struckmann at uni-rostock.de
          Hardware: x86_64
            Status: NEW
           Version: 1.2
         Component: NetX (javaws)
           Product: IcedTea-Web

Created attachment 720
  --> http://icedtea.classpath.org/bugzilla/attachment.cgi?id=720&action=edit
STDERR and STDOUT of javaws -verbose

Dear IcedTea-Web team, unfortunately, I have to file a bug report on your
javaws implementation that affects the FileOpenService implementation. I guess,
it must occur with each program that calls openMultiFileDialog.

Using openMultiFileDialog always thows an exception:

The followng line (XFileOpenService.java:97) causes a ClassCastException:

 return (FileContents[]) ServiceUtil.createPrivilegedProxy(
                               FileContents.class, xfiles);

I played a bit with the extracted method and found, that the result of
createPrivilegedProxy is an instance of FileContents (as I would expect from
the code). Simply replacing the class parameter FileContents.class by a
FileContents[]-reference does not work, because then, an
IllegalArgumentException is thrown by getProxyClass (the array is not an
interface).

I'll append a log file and, if you really need, I could spend some 10 minutes
next week, to produce a javaws package to reproduce the error.

Thank you for the great FREE javaws implementation,

Stephan

The exception occuring in javaws:

javaws Desktop/ArrayNormalizer.jnlp 
Exception in thread "AWT-EventQueue-1" java.lang.ClassCastException: $Proxy10
cannot be cast to [Ljavax.jnlp.FileContents;
    at
net.sourceforge.jnlp.services.XFileOpenService.openMultiFileDialog(XFileOpenService.java:97)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at
net.sourceforge.jnlp.services.ServiceUtil$PrivilegedHandler$1.run(ServiceUtil.java:183)
    at java.security.AccessController.doPrivileged(Native Method)
    at
net.sourceforge.jnlp.services.ServiceUtil$PrivilegedHandler.invoke(ServiceUtil.java:188)
    at $Proxy5.openMultiFileDialog(Unknown Source)
    at
de.unirostock.ibima.arrayNormalizer.AFile.openMultiFileDialog(AFile.java:277)


And, just fyi, createPrivilegedProxy cannot be called with FileContents[], it
needs an interface class:

Exception in thread "main" java.lang.IllegalArgumentException:
[Ljavax.jnlp.FileContents; is not an interface
    at java.lang.reflect.Proxy.getProxyClass(Proxy.java:379)
    at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:598)
    at
net.sourceforge.jnlp.services.ServiceUtil.createPrivilegedProxy(ServiceUtil.java:158)
    at net.sourceforge.jnlp.services.Test.test(Test.java:29)
    at net.sourceforge.jnlp.services.Test.main(Test.java:13)

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