[jboss-user] [Javassist] - Problem with GluonJ and javassist.gluonj.util.Loader

[Dmitriy Zavodnikov]

Dmitriy Zavodnikov [https://community.jboss.org/people/dzavodnikov] created the discussion

"Problem with GluonJ and javassist.gluonj.util.Loader"

To view the discussion, visit: https://community.jboss.org/message/731467#731467

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I have a problem with part of *GluonJ* library: javassist.gluonj.util.Loader
I have this code:

    Loader loader = new Loader(Class.class.getClassLoader(), new String[0]);
    Class<?> sanselan1 = loader.loadClass("org.apache.sanselan.Sanselan");

    // Read image.
    Method getBI = sanselan1.getMethod("getBufferedImage", new Class[]{ File.class } );
    BufferedImage image = (BufferedImage) getBI.invoke(null, new Object[]{ imageIn });

And this code +work correctly+!

But this code don't works:

    Method setBI = *sanselan1*.getMethod(
            "writeImage", 
            new Class[]{ BufferedImage.class, File.class, ImageFormat.class, Map.class }
        );
    setBI.invoke(null, new Object[]{ image, imageOut, ImageFormat.IMAGE_FORMAT_PNG, null });

I get an error:

java.lang.NoSuchMethodException: org.apache.sanselan.Sanselan.writeImage(java.awt.image.BufferedImage, java.io.File, org.apache.sanselan.ImageFormat, java.util.Map)

But if I using standart class loader:

    Class<?> *sanselan2* = Class.forName("org.apache.sanselan.Sanselan");
    //...
    Method setBI = *sanselan2*.getMethod(
            "writeImage", 
            new Class[]{ BufferedImage.class, File.class, ImageFormat.class, Map.class }
        );
    setBI.invoke(null, new Object[]{ image, imageOut, ImageFormat.IMAGE_FORMAT_PNG, null });

Everithing works fine! It meanse, that org.apache.sanselan.Sanselan have method writeImage and I correctly called it. 

But if I using javassist.gluonj.util.Loader I have an exception: NoSuchMethodException.

What is a problem?
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