How to Edit Java Mapping Using NWDS

Jun 10, 2018

If you are new to Java mapping in SAP PI/PO you will be wondering how to edit an existing Java mapping. If you haven’t done it before it could become a complex task. This article aims to provide a step-by-step guide on how to edit an existing Java mapping using Netweaver Developer Studio (NWDS). If you have never worked with NWDS read my previous post on how to configure NWDS for PI/PO developments.

Overview of steps to edit Java Mapping using NWDS,

Find the Java Mapping which needs to be changed.
Download the .jar or .zip files.
Create new Java Project in NWDS
Import .zip or .jar files to Java Project.
Edit Java code.
Export Java Project as .jar.
Re-import the .jar file to SAP PI.

Netweaver Developer Studio should be installed and configured for PI/PO development before you can follow these steps. If you have not installed it, then read my previous post on how to configure NWDS for PI/PO development.

SAP Versions used in the illustration:

SAP PO 7.5
NWDS 7.5 SP 11

Step 1: Identify Java Mapping (Imported Archive) to be Edited.

Find the Java Mapping you want to edit either by operation mapping or directly accessing Imported Archives under Software Component Version. In this example, we will edit the Imported Archive “Java_copyPayload” which contains the java class “copyPayload”.

find Java Mapping attached to Operation Mapping — Java Mapping attached to Operation Mapping

Access Java Mappings under Imported Archives of SWCV

As an example, I have created a simple Java Mapping named JAVA_copyPayload to copy input to output.

Step 2: Download Imported Archive as .Jar or .Zip file.

Download the Imported Archive as a .Jar file or .Zip file to local machine.

Click export option to download the Imported Archive Java Mapping

Edit Post ‹ SAP Integration Hub — WordPress.html — Download Imported Archive Java Mapping as .Jar

Step 3: Create New Java Project in NWDS.

Open NWDS and create a new Java Project. Assign a suitable name for your Java Project.

Create new Java Project using NWDS menu path new, new Java Project — Create new Java Project

Set a name of the new Java Project and assign other properties in NWDS — Set a name of the new Java Project

Import XPi library to your Java Project.

add library XPI to new Java Project — Add library XPI

Java Project created using wizard in eclipse NWDS — Java Project created

Step 4: Import .zip or .jar file of Imported Archive to Java Project.

Import Archive File to Java Project in NWDS — Import Archive File to Java Project

Select the .Jar file to be imported to NWDS — Select the .Jar file

Select content of Archive file to be imported in NWDS — Select content of Archive file

Sample Java mapping simply copies the input payload to output.

Java Archive File imported to Java Project in NWDS — Java Archive File imported to Java Project

Step 5: Edit java Code.

Every Java Mapping should implement the ‘transform’ method of extended ‘AbstractTransformation’ class. Java mapping in the example copies the input payload to the output. I have edited the mapping to copy new string to the output.