Macro to_jvalue

macro_rules! to_jvalue {
    ({ boolean $($param_name:ident)? }, $value:expr) => { ... };
    ({ byte $($param_name:ident)? }, $value:expr) => { ... };
    ({ char $($param_name:ident)? }, $value:expr) => { ... };
    ({ double $($param_name:ident)? }, $value:expr) => { ... };
    ({ float $($param_name:ident)? }, $value:expr) => { ... };
    ({ int $($param_name:ident)? }, $value:expr) => { ... };
    ({ long $($param_name:ident)? }, $value:expr) => { ... };
    ({ short $($param_name:ident)? }, $value:expr) => { ... };
    ({ void }, $value:expr) => { ... };
    ({ $($class:ident)+ $([])? $($param_name:ident)? }, $value:expr) => { ... };
}

Cast a JValueGen to a concrete type by the given type

use jni::sys::JNI_TRUE;
use risingwave_jni_core::{cast_jvalue, to_jvalue};
assert_eq!(
    cast_jvalue!({ boolean }, to_jvalue!({ boolean }, JNI_TRUE)),
    true
);
assert_eq!(cast_jvalue!({ byte }, to_jvalue!({ byte }, 10)), 10);
assert_eq!(
    cast_jvalue!({ char }, to_jvalue!({ char }, 'c')),
    'c' as u16
);
assert_eq!(cast_jvalue!({ double }, to_jvalue!({ double }, 3.14)), 3.14);
assert_eq!(cast_jvalue!({ float }, to_jvalue!({ float }, 3.14)), 3.14);
assert_eq!(cast_jvalue!({ int }, to_jvalue!({ int }, 10)), 10);
assert_eq!(cast_jvalue!({ long }, to_jvalue!({ long }, 10)), 10);
assert_eq!(cast_jvalue!({ short }, to_jvalue!({ short }, 10)), 10);
cast_jvalue!(
    { String },
    to_jvalue!({ String }, &jni::objects::JObject::null())
);