Sam Brannen a0f5c16627 Support MethodHandle function invocation with zero varargs in SpEL ...

Prior to this commit, the Spring Expression Language (SpEL) could not
invoke a varargs MethodHandle function with zero variable arguments,
even though the variable arguments are not required. Attempting to do
so resulted in a SpelEvaluationException with an
INCORRECT_NUMBER_OF_ARGUMENTS_TO_FUNCTION message.

This commit addresses this by updating the
executeFunctionViaMethodHandle(...) method in FunctionReference so that
it properly checks the required number of arguments for both varargs
and non-varargs MethodHandle invocations.

This commit also improves the error message for varargs invocations
with too few arguments. For example, if the MethodHandle requires at
least 1 argument plus a variable number of additional arguments and 0
arguments were supplied, the error message now states:

"Incorrect number of arguments for function 'myFunc': 0 supplied but function takes 1 or more"

Instead of:

"Incorrect number of arguments for function 'myFunc': 0 supplied but function takes 2"

Closes gh-33190

2024-07-10 13:39:48 +02:00

..

src

Support MethodHandle function invocation with zero varargs in SpEL

2024-07-10 13:39:48 +02:00

spring-expression.gradle

Support Kotlin value class properties in SpEL

2023-08-11 16:54:34 +02:00