[jboss-jira] [JBoss JIRA] Created: (JASSIST-101) Support for generic types

[Jose Freire (JIRA)]

Support for generic types
-------------------------

                 Key: JASSIST-101
                 URL: https://jira.jboss.org/jira/browse/JASSIST-101
             Project: Javassist
          Issue Type: Feature Request
         Environment: Java >= 5.0 
            Reporter: Jose Freire
            Assignee: Shigeru Chiba


Javassist currently doesn't support generic types, coercing the generic properties to Object.class.

As an example, if we have:

public class GenericsTest<E extends Object> {

       private E value;

       public E getValue() {
              return value;
       }

       public void setValue(E value) {
              this.value = value;
       }
}

and we have:
public class IntegerTest extends GenericsTest<Integer> {

}

Javassist will not recognize the property "value" type as Integer.class, but as Object.class, like:

public class IntegerTest$$javassist$$ {
     private Object value;

       public Object getValue() {
              return value;
       }

       public void setValue(Object  value) {
              this.value = value;
       }
}

What has do be done, while processing the property descriptors of class is:
1) is the propertyDescriptor.getPropertyType == Object.class? If yes then continue to step 2
2) is java version >= 1.5.0? If yes then continue to step 3
3) return GenericReflectionUtil.resolveGenericType(<Class>, <propertyDescriptor>);

I'll upload GenericReflectionUtil.java and ResolveGenericTypeTestCase.java for your review.


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