SAP CPI (Cloud Platform Integration) – Advanced Message Transformation
In SAP Cloud Platform Integration (SAP CPI), message mapping is a crucial step for transforming data from a source format to a target format during integration. While the standard graphical mapping editor covers many common transformation needs, there are scenarios that require more complex logic or reusable processing steps. This is where custom functions in message mapping come into play.
This article explains what custom functions are, why they are useful, and how to create and use them within SAP CPI message mappings.
Custom functions are user-defined, reusable blocks of logic that can be incorporated into message mappings. They allow developers to encapsulate complex transformation rules or computations that are not easily achievable with standard graphical mapping operations.
Custom functions support:
SAP CPI supports two types of custom functions in message mapping:
Graphical Custom Functions
Created using the standard graphical mapping editor by combining operations and expressions into a reusable function node.
Script-Based Custom Functions
Developed using JavaScript for more advanced or complex logic that cannot be built graphically.
Start by opening or creating a message mapping in the CPI Integration Designer.
Example of a simple JavaScript function that converts a string to uppercase:
function convertToUpperCase(input) {
return input.toUpperCase();
}
Once created, custom functions behave like standard mapping functions. You can:
Custom functions in SAP CPI message mapping provide powerful ways to extend transformation capabilities beyond standard graphical mappings. By encapsulating complex logic into reusable, maintainable components, integration developers can build more efficient, readable, and flexible mappings.
Mastering custom functions is an essential step for advanced SAP CPI developers seeking to tailor integrations precisely to business requirements.