Although still experimental and although only a few tests exist for Method-level-validation, some people are already using it and are reporting problems or providing patches.
For the old code-base (agimatec-validation, no further development going on) I got a patch that fixes some misbehavior in the MethodValidatorMetaBeanFactory.
To provide a better way for the agimatec-validation users to migrate to apache-bval, I suggest to merge the changes into the current code base.
see original post at: http://code.google.com/p/agimatec-validation/issues/detail?id=26
when processAnnotation is called in MethodValidatorMetaBeanFactory
is called the type of the class owning the method is used to process
parameter constraints rather than the type of the parameter. This causes
something like a @Min annotation on a parameter to generate an exception
because no appriopriate validator class can be found for the class
declaring the method.
the @Valid annotation causes 'setCascaded' to be called on the
MethodDescriptor but not on the ParameterDescriptor where it needs to be
set. Because of this validation doesn't cascade to the parameter object.
the @Valid is treated as being mutually exclusive from other
constraint annotations on a parameter. It is common to use @Valid with
@NotNull since @Valid doesn't make assumptions about the nullability of a