Status: New
Owner: ----
New issue 715 by [email protected]: Types doesn't match JDK7 behaviour
where primitive arrays are used as type parameters
http://code.google.com/p/google-guice/issues/detail?id=715
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/common/reflect/Types.java#471
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