Inconsistent handling of invalid boolean input parameters to a web service

Issue

In JBoss EAP 6.1.1, the following web service input parameters are mapped to the boolean value false:

test
fAlse
tRue
“ “ (single space)

whereas the following parameters are mapped to null:

asdf
TRUE
FALSE
True
False

and the following parameters result in an Unmarshalling error:

t
f

From a user’s perspective, this behavior is inconsistent and hard to understand.

1. Is this behavior intended?
2. Why not map all invalid boolean input parameters to the same value (false / null / unmarshalling error)?
3. Is it possible that this behavior will change again in a future version? We noticed that AS 7.1.1 behaves differently.
4. How can we enforce a certain, consistent behavior for our web services?

Example of UnmarshalException message:

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: 1