[Bug libgcj/23288] java.lang.Class's #getPackage() returns null

["tromey at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From tromey at gcc dot gnu dot org  2005-09-09 18:35 -------
Note also that Package.getVersion fails when the class file comes from a
jar.  With the included example you can see this by making a manifest file
(in my example named "J/Man"):

Main-Class: men.gcjpackage.TestPackage

Name: men/gcjpackage/
Specification-Title: JChemPaint
Specification-Version: 2.0
Specification-Vendor: The JChemPaint Project
Implementation-Title: jchempaint
Implementation-Version: 2.0.12
Implementation-Vendor: The JChemPaint Project


Then make a jar:

jar -cv -m J/Man -f J/men.jar men/gcjpackage/*.class

And change the test to:

package men.gcjpackage;

public class TestPackage
{
  public static void main(String[] args)
  {
    System.out.println("ClassLoader: " + TestPackage.class.getClassLoader() );
    Package x = TestPackage.class.getPackage();
    System.out.println("Package: " + x);
    System.out.println("Version: " + x.getImplementationVersion());
  } // main
} // TestPackage


With the JDK the last line prints:

Version: 2.0.12

With gij it prints:

Version: null


As the names suggest, this prevents JChemPaint from working:
http://almost.cubic.uni-koeln.de/cdk/jcp


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23288