Name: ipR10067 Date: 07/19/2001



Some new (JCK1.4) javax.imageio tests failed in applet mode in JDK 1.4.0-beta build b65.
however these tests passed in application mode.

To reproduce the bug use files in attachment.
Just run demo_bug.
NOTE. Please change activeHost value in applet.html
and TESTJAVADIR in demo_bug script to actual values.

I have an idea why it happens.
The bug occurs when calling method
java.util.ResourceBundle.getBundle(String baseName, Locale locale)
within some javax.imageio classes, such as javax.imageio.ImageReader,
javax.imageio.ImageWriter and javax.imageio.metadata.IIOMetadataFormatImpl.

Method getBundle of ResourceBundle class uses method getLoader:

 private static ClassLoader getLoader() {
        Class[] stack = getClassContext();
        /* Magic number 2 identifies our caller's caller */
        Class c = stack[2];
        ClassLoader cl = (c == null) ? null : c.getClassLoader();
        if (cl == null) {
            cl = ClassLoader.getSystemClassLoader();
        }
        return cl;
    }

In our case getClassLoader for abstract class javax.imageio.ImageReader
returns null and therefore getLoader returns system class loader.
In application mode system class loader and loader for application match
but in applet mode they are different. Loader returned by getLoader() is used for
searching for bundle in getBundleImpl method. In applet mode
system class loader does not allow to find bundles.
As a result java.util.MissingResourceException is thrown.
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The tests failed due to this bug:

api/javax_imageio/ImageWriter/index.html#writeWarningListener[writeWarningListener001]
api/javax_imageio/ImageReader/index.html#readWarningListener[readWarningListener001]
api/javax_imageio/metadata/IIOMetadataFormatImpl/index.html#getElementDescription[getElementDescription003]
api/javax_imageio/metadata/IIOMetadataFormatImpl/index.html#getAttrDescription[getAttributeDescription005]

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