BehaviorInvocationException: Too few values in second queue in function useOneAsMany

[Deepak_Khani07]

Problem Statement

In SAP CPI Message Mapping, I faced a OneAsMany violation due to mismatched occurrences between two source fields:

• Company Code → Occurrence = 1

• PRODUCTTAXITEM → Occurrence = 2
  So basically, due to difference in context change, I was not able to use it in value mapping where the target field occurrence is also 2 times, due to this if i use it without OneasMany, it is throwing error : target field require value for it.

This resulted in the following OneAsMany rules being violated:

Rule 1: Input 1 should not contain repeating values in the same context.

Business requirement was to:

• Increase the context of Company Code

• Match it with the number of PRODUCTTAXITEM occurrences

• Repeat only the first Company Code value for all PRODUCTTAXITEM contexts.

  Groovy code used is as follows:

  import com.sap.it.api.mapping.*

  // Function name must match the name used in Message Mapping UI
  def void replicateCompanyCode(
  String[] companyCode,
  String[] productTaxItem,
  Output companyCodeOut,
  MappingContext context) {

  // Guard checks
  if (companyCode == null || companyCode.length == 0 ||
  productTaxItem == null || productTaxItem.length == 0) {
  companyCodeOut.addSuppress()
  return
  }

  // Take only the first Company Code
  String firstCompanyCode = companyCode[0]

  // Create context based on PRODUCTTAXITEM count
  for (int i = 0; i < productTaxItem.length; i++) {
  companyCodeOut.addValue(firstCompanyCode)
  companyCodeOut.addContextChange()
  }
  }
  
  Unit test :