[HARMONY-5622] [drlvm][kernel][geronimo] Method.getGeneric*() methods throw NPE for parametrized interface methods

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 5.0M5
• Fix Version/s: 5.0M6
• Component/s: App-Oriented Bug Reports, DRLVM
• Assignee: Vasily Zakharov
• Reporter: Vasily Zakharov
• Created: 20/Mar/08 10:22
• Updated: 24/Apr/08 16:06
• Resolved: 24/Mar/08 13:51

Description

Class Method methods getGenericParameterTypes(), getGenericReturnType() and toGenericString() throw NPE if called for a parametrized method in an interface.

Here's the test demonstrating the problem:

import java.lang.reflect.Method;
public class Test {
public static void main(String[] args) {
boolean success = true;
try {
Method method = Sample.class.getMethods()[0];
for (int i = 0; i < 5; i++) {
try {
switch

{ case 0: method.getGenericParameterTypes(); break; case 1: method.getGenericReturnType(); break; case 2: method.getGenericExceptionTypes(); break; case 3: method.getTypeParameters(); break; case 4: method.toGenericString(); break; }

} catch (Exception e)

{ success = false; System.out.print("FAIL: "); e.printStackTrace(System.out); }

}
System.out.println(success ? "SUCCESS" : "FAILURE");
} catch (Exception e)

{ System.out.print("ERROR: "); e.printStackTrace(System.out); }

}
}
interface Sample {
public <T extends Sample, E extends Throwable> T test(T param) throws E;
}

Output on RI:

SUCCESS

Output on Harmony:

FAIL: java.lang.NullPointerException
at org.apache.harmony.lang.reflect.support.AuxiliaryFinder.findTypeVariable(AuxiliaryFinder.java:293)
at org.apache.harmony.lang.reflect.parser.Parser.getGenericParameterTypes(Parser.java:742)
at java.lang.reflect.Method.getGenericParameterTypes(Method.java:110)
at Test.main(Test.java:10)
FAIL: java.lang.NullPointerException
at org.apache.harmony.lang.reflect.support.AuxiliaryFinder.findTypeVariable(AuxiliaryFinder.java:293)
at org.apache.harmony.lang.reflect.parser.Parser.getGenericReturnTypeImpl(Parser.java:447)
at java.lang.reflect.Method.getGenericReturnType(Method.java:126)
at Test.main(Test.java:12)
FAIL: java.lang.NullPointerException
at org.apache.harmony.lang.reflect.support.AuxiliaryFinder.findTypeVariable(AuxiliaryFinder.java:293)
at org.apache.harmony.lang.reflect.parser.Parser.getGenericParameterTypes(Parser.java:742)
at java.lang.reflect.Method.toGenericString(Method.java:150)
at Test.main(Test.java:18)
FAILURE

This issue is critical as it prevents Geronimo Deployer from working on Harmony.

Issue Links

• is related to: HARMONY-5005 [drlvm][kernel][geronimo] Field.getGenericType() fails on a parametrized class from custom classloader
• is related to: HARMONY-5086 [drlvm][kernel][geronimo] AnnotatedElement.getDeclaredAnnotations() throws exception if annotation is not available
• is related to: HARMONY-5180 [drlvm][kernel][geronimo] Annotations get loaded with wrong classloader
• relates to: HARMONY-5790 [drlvm][interpreter] Stack size is not enough