Types doesn't match JDK7 behaviour where primitive arrays are used as type parameters

[GoogleCodeExporter]

This code, using Guava's TypeToken, returns 'true' in JDK6 and 'false' in JDK7.

TypeToken listOfByteArray = new TypeToken<List<byte[]>>(){};
TypeToken listOfByteArray2 = 
TypeToken.of(com.google.inject.util.Types.listOf(byte[].class));
System.out.println(listOfByteArray2.isAssignableFrom(listOfByteArray));

This is because listOfByteArray2 is a ParameterizedType whose argument is a 
GenericArray whose component type is byte[].
This matches the JDK6 behaviour when reflecting on a field of type List<byte[]>.

In JDK7 a bug was fixed 
(http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5041784); this type is now 
represented by a ParameterizedType whose argument is byte[].class.

So the correct behaviour, I think, is to detect the current JDK version and use 
the appropriate implementation.
The corresponding class in Guava does this: 
http://code.google.com/p/guava-libraries/source/browse/guava/src/com/google/comm
on/reflect/Types.java#471

Original issue reported on code.google.com by sammcc...@google.com on 17 Jul 2012 at 3:37

[GoogleCodeExporter]

Agreed.  I'll roll a fix. 

Original comment by cgruber@google.com on 17 Jul 2012 at 6:52

• Changed state: Accepted
• Added labels: Type-Defect, Priority-High, Component-Core

[GoogleCodeExporter]

Or rather, I'll dig into an internal discussion and summarize the relevant 
portions here.

Original comment by cgruber@google.com on 17 Jul 2012 at 7:08