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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-5196) [classlib][luni][gut] EnumSet.elementType field doesn't exist
Date Mon, 26 Nov 2007 16:53:42 GMT
[classlib][luni][gut] EnumSet.elementType field doesn't exist
-------------------------------------------------------------

                 Key: HARMONY-5196
                 URL: https://issues.apache.org/jira/browse/HARMONY-5196
             Project: Harmony
          Issue Type: Bug
          Components: App-Oriented Bug Reports, Classlib
            Reporter: Vasily Zakharov


When running Geronimo Unit Tests v2.0.2, the following exception occurs:

java.lang.RuntimeException: Could not access java.util.EnumSet.elementType field
	at com.thoughtworks.xstream.core.util.Fields.find(Fields.java:18)
	at com.thoughtworks.xstream.converters.enums.EnumSetConverter.<init>(EnumSetConverter.java:31)
	at java.lang.reflect.VMReflection.newClassInstance(VMReflection.java)

Here's the simple code to reproduce:

public class Test {
    public static void main(String[] args) {
        try {
            System.out.println("SUCCESS: " + java.util.EnumSet.class.getDeclaredField("elementType"));
        } catch (Exception e) {
            e.printStackTrace(System.out);
        }
    }
}

Output on RI:

SUCCESS: final java.lang.Class java.util.EnumSet.elementType

Output on Harmony:

java.lang.NoSuchFieldException: elementType
        at java.lang.Class.getDeclaredField(Class.java:373)
        at Test.main(Test.java:4)

Clearly enough, the mentioned field is package private, it's not covered by the spec, and
probably it contains the element type of the EnumSet.

Addressing such a field in an application is clearly a bug, and it should be reported to XStream
developers (http://xstream.codehaus.org).

However, as this issue occurred, I think it worths to behave compatibly. Harmony implementation
of EnumSet has elementClass field that seems to be the equivalent of RI's elementType field.
So my suggestion is to rename elementClass to elementType and thus become more compatible
and move GUT v2.0 enabling forward.


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