[jboss-dev-forums] [Design of POJO Server] - Re: Serialization, NoSuchMethodException in ProfileServiceUn

[alesj]

Yes.
This is when you are trying to transform runtime type instance - which is generics unaware.

If you did something like this:

  | public class MyClass
  | {
  |    public byte[] someBytes();
  | }
  | 
And then (pseudo) MyClass.getMethod("someBytes").getGenericReturnType().
Then it would fail.

In this code

  |    public T get(Type type)
  |    {
  |       if (type == null)
  |          throw new IllegalArgumentException("Null type");
  | 
  |       if (type instanceof ParameterizedType)
  |          return getParameterizedType((ParameterizedType) type);
  |       else if (type instanceof Class)
  |          return getClass((Class<?>) type);
  |       else if (type instanceof TypeVariable)
  |          // TODO Figure out why we need this cast with the Sun compiler? 
  |          return (T) getTypeVariable((TypeVariable) type);
  |       else if (type instanceof GenericArrayType)
  |          return getGenericArrayType((GenericArrayType) type);
  |       else if (type instanceof WildcardType)
  |          return getWildcardType((WildcardType) type);
  |       else
  |          throw new UnsupportedOperationException("Unknown type: " + type + " class=" + type.getClass());
  |    }
  | 

The first example is picked up by (instance of Class), where the 2nd one is by the method I mentioned before.

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