Between Elements of the Same Logic

In one and the same logic, e.g., pricing logic, you can refer to a constant (e.g., parameter name) in previous elements like this:

• Assume there is an element Params defined as:

...

• Code Block

...

• language groovy

...

• PARAM_PE = "PE" PARAM_MARGIN = "Margin"

• Further down in the logic, in another element, those constants are looked up like this:

...

• Code Block

...

• language groovy

...

• api.vLookup( Params.PARAM_PE, ...)

This works since the static strings defined in the Params element are accessible from subsequent elements in the same logic.

...

However, if element Params was defined in a Groovy library – not an unusual use case if the parameter names are to be shared across multiple logics – then the above scheme no longer works.

There is, however, a way to make it work.  Say you define a Groovy library named 'PO'.  Within that library you define a Params element, but this time:

• You define the static parameter names as:

   

  paste-code-macro
  language groovy title Definition of constants in Groovy Library code
  @Field PARAM@Field PARAM_PE = "PE" @Field @Field PARAMPARAM_MARGIN = "Margin"

• Then you can refer to those parameter names in ordinary logics with:

  paste-code-macro
  language groovy title Referencing Groovy Library constants from other elements
  libs.PO.Params.PARAM_PE