Declared method "get" does not exist for class "io.fno.grel.ArrayFunctions"

[Bahar-Gh]

Hello,

I am trying to create a mapping in which I split the full name into a first name and last name using fno in rml (jar: rmlmapper-4.13.0-r359-all.jar ). My code is like

<#FunctionSplitName>
    fnml:functionValue [
                           rml:logicalSource <#LogicalSource>;
                           rr:predicateObjectMap [
                                                 rr:predicate fno:executes;
                                                 rr:objectMap [
                                                                  rr:constant grel:string_split
                                                              ];
                                             ];
                           rr:predicateObjectMap [
                                                 rr:predicate grel:valueParameter;
                                                 rr:objectMap [
                                                                  rml:reference "metadata__customer_name"
                                                              ];
                                             ];
                           rr:predicateObjectMap [
                                                 rr:predicate grel:p_string_sep;
                                                 rr:objectMap [
                                                                  rr:constant " ";
                                                              ];
                                             ];
                       ].

<#FunctionGetName>

    fnml:functionValue [
                           rr:predicateObjectMap [
                                                     rr:predicate fno:executes ;
                                                     rr:objectMap [ rr:constant grel:array_get ]
                                                 ] ;
                           rr:predicateObjectMap [
                                                     rr:predicate grel:p_array_a ;
                                                     rr:objectMap <#FunctionSplitName>
                                                 ] ;
                           rr:predicateObjectMap [
                                                     rr:predicate grel:param_int_i_from ;
                                                     rr:objectMap [
                                                                      rr:constant 0 ;
                                                                      rr:datatype xsd:integer ;
                                                                  ]
                                                 ];
                           rr:predicateObjectMap [
                                                     rr:predicate grel:param_int_i_opt_to ;
                                                     rr:objectMap [
                                                                      rr:constant 1 ;
                                                                      rr:datatype xsd:integer ;
                                                                  ]
                                                 ]
                       ].

When I run this, I will get the following error:

ERROR be.ugent.rml.cli.Main               .main(389) - Declared method "get" does not exist for class "io.fno.grel.ArrayFunctions".

It seems that I am getting this error regardless of the objectMap in grel:p_array_a of array_get function. For instance if I change the object map from <#FunctionSplitName> to something like

rr:objectMap [
            rml:reference "metadata__customer_name" ;
            rr:datatype   rdf:List ]

I will still get the same error. I'm not sure if I'm doing something wrong...

[DylanVanAssche]

Hi @Bahar-Gh !

Could you provide a minimal reproducible example: full mapping rules, input data and expected output?

Thanks!

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