How to resolve reference with a form control value

If you need not just to maintain lookup for a refence group but also to validate a manually input value, you need to implement resolveReference method for the field of the form data source. Say, we want to validate a custom financial dimension value.

You can check resolveReference* methods in EcoResCategory table as a good example.

The most interesting detail for me is the way how the related form control value is found inside of the given reference group.

            /// <summary>
            /// Resolve reference
            /// </summary>
            /// <param name = "_formReferenceControl"></param>
            /// <returns></returns>
            public Common resolveReference(FormReferenceControl _formReferenceControl)
            {
                Common ret;
            
                ret = myAssignedBankAccountDimension.dimensionResolveReference(_formReferenceControl);
            
                return ret;
            }

    public Common dimensionResolveReference(FormReferenceControl _formReferenceControl)
    {
        DimensionAttribute                          dimensionAttribute;
        DimensionAttributeDirCategory               dimAttributeDirCategory;
        DimensionFinancialTag                       dimensionFinancialTag;
        myFinancialDimensionValueFinancialTagView  view;
        myAssignedBankAccountDimension             myAssignedBankAccountDimension;
        DimensionDisplayValue                       dimensionDisplayValue;

        if (!_formReferenceControl || _formReferenceControl.handle() != classNum(FormReferenceGroupControl) )
        {
            throw(error(strFmt("@SYS137393", Error::wrongUseOfFunction(funcName())) ));
        }

        dimensionDisplayValue = _formReferenceControl.filterValue(AbsoluteFieldBinding::construct(fieldStr(DimensionFinancialTag, Value), tableStr(DimensionFinancialTag))).value();
        dimensionDisplayValue = strLRTrim(dimensionDisplayValue);
        
        <..  implement your logic with the display value ...>