jnull not defined

[DrChainsaw]

julia> jlist = @jimport java.util.ArrayList
JavaObject{Symbol("java.util.ArrayList")}

julia> jcall(jlist(), "add", jboolean, (JObject,), nothing)
ERROR: UndefVarError: jnull not defined
Stacktrace:
 [1] convert at \.julia\packages\JavaCall\CHGwC\src\convert.jl:24 [inlined]
 [2] convert_arg(::Type{JavaObject{Symbol("java.lang.Object")}}, ::Nothing) at \.julia\packages\JavaCall\CHGwC\src\convert.jl:85
 [3] convert_args(::Tuple{DataType}, ::Nothing) at \.julia\packages\JavaCall\CHGwC\src\convert.jl:67
 [4] _jcall(::JavaObject{Symbol("java.util.ArrayList")}, ::Ptr{Nothing}, ::Ptr{Nothing}, ::Type{UInt8}, ::Tuple{DataType}, ::Nothing) at \.julia\packages\JavaCall\CHGwC\src\core.jl:295
 [5] jcall(::JavaObject{Symbol("java.util.ArrayList")}, ::String, ::Type{T} where T, ::Tuple{DataType}, ::Nothing) at \.julia\packages\JavaCall\CHGwC\src\core.jl:231
 [6] top-level scope at REPL[8]:1
 [7] include_string(::Function, ::Module, ::String, ::String) at .\loading.jl:1088

This seems to work as a workaround, but its probably not the right way:

julia> Base.convert(o::Type{JavaObject{T}}, ::Nothing) where T = o(JavaCall.JavaLocalRef(C_NULL))

julia> jcall(jlist(), "add", jboolean, (JObject,), nothing)
0x01

[mkitti]

I can verify jnull is missing.

My recommended workaround is:

julia> julia> Base.convert(o::Type{JavaObject{T}}, ::Nothing) where T = o(JavaCall.J_NULL)

julia> jcall(jlist(), "add", jboolean, (JObject,), nothing)
0x01

For more general backwards compatibility with earlier versions of JavaCall use:

jcall(jlist(), "add", jboolean, (JObject,), JObject(C_NULL))

[DrChainsaw]

Awesome! Thanks alot.