Limiting weight values to be transferred to target system

Question

Hi All,
I have a requirement according to which I need to reduce the number of digits being passed to IDOC segmnet fields Z1BP_J_1BNFDOC-BRGEW and Z1BP_J_1BNFDOC-NTGEW. This IDOC will transfer data to a non-SAP target system. In the target system, the gross weight & net weight (BRGEW & NTGEW respectively having total length 13 with 3 decimal places in SAP) have mask: 9999999.99999 (7 digits before decimal and 5 digits after decimal). So the total digits that should be transferred to the target system should not be more than 12.
The method to achieve this, as suggested by functional, was to divide the weight values by 1000 instead of directly truncating the values so that there is no loss of data. For example, if the value in weight field is 123,234,432.000 KG, then on dividing it by 1000, it will result in 123,234.432 KG, which is correct. But using this method, if the number of digits in the weight field is less than 4 digits, for example, 123.000 KG, then on dividing this value by 1000, it will result in 0.123 KG, which is incorrect. And to avoid such a situation, if I apply a condition that the weight values should be divided by 1000 only when the number of digits before the decimal is more than 3, then I am facing the following issue:
Say, there is one value 123,4.000 KG, then in this case since the number of digits is more than 3 before the decimal, it will be divided by 1000, so we get: 1.234 KG. Now, there is another value say, 123.000 KG, then since in this case the number of digits before the decimal is 3, it will not be divided by 1000, so it will remain the same, that is, 123.000 KG. But comparing the two values, initially: 123,4.000 KG > 123.000 KG; and after applying the above logic: 1.234 KG < 123.000 KG, which is again incorrect.
Please suggest an appropriate solution.  
Thanks & Regards,
Ankit

Answer 1

Reverse logic can figured out if boundary conditions are taken care of.
For input conversion, you are doing something like:
if input > 1000.
     output = input / 1000.
endif.
Reverse case can be:
if frac( output ) > 0.
     input = output * 1000.
endif.
FRAC function strips the integer part and gives only the fraction part.
Both logic would fail for specific cases.
Imagine 123KG becoming 123.000 KG as it is less than 1000.
On the other hand, 123,000 KG would also become 123.000 KG because input is greater than 1000.
When last 3 digits are anything other than 000, both input and output logic would work fine.
Tell your functional about above scenario.
Your requirement sounds really weird.
For exception cases, think about this.
Technically variable can store negative, but logically negative input weight may never come.
Whenever input ends with 000, can you apply negative sign and change 000 to 001, so that both logic work.