In the SAP Process Integration (PI) and Process Orchestration (PO) environment, data transformation is a crucial aspect of integrating heterogeneous systems. While graphical mapping handles most standard use cases, complex transformations often require custom logic. This is where Java Mapping comes into play, offering a powerful and flexible way to implement advanced data manipulation in SAP PI/PO.
Java Mapping allows developers to write custom Java code to transform messages between the sender and receiver formats. Unlike graphical mapping, Java Mapping supports complex scenarios such as looping, conditional processing, integration of external libraries, and fine-grained control over message content.
Java Mapping is executed by the Integration Engine at runtime, transforming the input message payload (usually XML) into the desired output format.
Java Mapping is recommended when:
Create a Java class that implements the com.sap.aii.mapping.api.StreamTransformation interface or extends AbstractTransformation. The primary method to implement is transform(), which takes the input message stream and returns the transformed output stream.
Example skeleton:
import com.sap.aii.mapping.api.*;
public class MyJavaMapping extends AbstractTransformation {
@Override
public void transform(TransformationInput input, TransformationOutput output) throws StreamTransformationException {
try {
// Read input XML
InputStream in = input.getInputPayload().getInputStream();
// Perform transformation logic (e.g., parse, modify XML)
// Write output XML
OutputStream out = output.getOutputPayload().getOutputStream();
// Example: Copy input to output (identity transformation)
byte[] buffer = new byte[1024];
int length;
while ((length = in.read(buffer)) > 0) {
out.write(buffer, 0, length);
}
} catch (Exception e) {
throw new StreamTransformationException("Error in Java Mapping: " + e.getMessage(), e);
}
}
}
.jar file.Mapping folder and select New > Java Mapping.Java Mapping in SAP PI/PO provides a robust solution for complex message transformations that exceed the capabilities of graphical mapping. By leveraging Java's power and flexibility, integration developers can implement custom logic tailored to unique business requirements.
Proper configuration and development of Java mappings enable enterprises to address challenging integration scenarios, ensuring seamless data exchange and robust process integration in SAP landscapes.