cast — Converts a set of objects to a known type
cast [[arguments] | [classes] | [fields] | [methods]]
Some expressions (such as annotated by)
might return results of any type. This leads to a situation where you might know
better than the BBQ parser what the result type of an expression is. The cast
transform allows you to supply that knowledge back to the parser so you can add
further processing to the expression without the parser complaining about type safety.
cast forces the objects in the set to be interpreted
as the specified type; any objects that aren't convertible to that type
are dropped from the set.
The following query returns methods annotated by annotations with the class org.junit.After
that do not call a method matching "finish."
not exists ( ~ "finish" methods called by calls from ) cast methods annotated by annotations with class "org.junit.After"
Note that without the cast transform,
the calls from
operator would produce a type mismatch error, since it can not be applied to
object.
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