Introduction

This blog explain you how to develop a java mapping class for using it in your Interface Mapping in SAP PI. It’s a tutorial for beginers.

Implements a Java class for mapping purpose require the next steps:

1.- Development Tool like SAP Netweaver Developer Studio, NetBeans, Eclipse ….

2.- Import aii_map_api.jar library.

3.- Write the Source code for the mapping program. (We need to know DOM or SAX parsing proccesing)

4.- Generate .jar file with the compiled class.

5.- Import Jar File in SAP PI.

6.- Use the program mapping in Interface Mapping.

1.- Open a Development Tool.

Firstly, we are going to open the SAP Netweaver Developer Studio for create a new project.

2.- Next, we must to import the aii_map_api.jar library. The file aii_map_api.jar is located in j2ee\cluster\server0\apps\sap.com\com.sap.xi.services directory.

3.-  Write Java Source.

package com.xi.test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.sap.aii.mapping.api.AbstractTrace;
import com.sap.aii.mapping.api.MappingTrace;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationConstants;
import com.sap.aii.mapping.api.StreamTransformationException;

public class NameMerge implements StreamTransformation {

private Map param = null;
private MappingTrace trace = null;

public void setParameter(Map param) {
this.param = param;
if (param == null) {
this.param = new HashMap();
}
}

public void execute(InputStream input, OutputStream output)
throws StreamTransformationException {

AbstractTrace trace = null;
String RESULT = new String();

trace =
(AbstractTrace) param.get(
StreamTransformationConstants.MAPPING_TRACE);

try {
//Create DOM parser
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();

//Parse input to create document tree
Document doc = builder.parse(input);
trace.addInfo(doc.toString());

//Map the elements
Node root = doc.getFirstChild(); // gets the root element
NodeList children = root.getChildNodes();

for (int item = 0; item < children.getLength(); item++) {
if (children.item(item) instanceof Element) {
root = (Element) children.item(item);
NodeList ch = root.getChildNodes();
RESULT = RESULT.concat(ch.item(0).getNodeValue() + ” “);
}

}

trace.addInfo(RESULT);

} catch (Exception e) {
trace.addDebugMessage(e.getMessage());
}

//Return the output document
String document_exit =
“”
+ RESULT
+ “”;

try {
output.write(document_exit.getBytes());
} catch (IOException e1) {
trace.addDebugMessage(e1.getMessage());
}

}

}

4.- Generate JAR file.

Go to File->Export in SAP Netweaver Developer Studio a choose the project where you have developed the mapping program and you must export it to a file.

5.- Import JAR File.

Go to Integration Repository, Mapping Object -> Imported Archives. You must to create a new Imported Archives and import the file that you had generated in SAP NDS.

6.- Use the program mapping in Interface Mapping

Finally, you have to use the java class in an Interface Mapping.

The XML used for creating the java test class are:

 

Ivan
Prieto
 

ivan prieto

 

New NetWeaver Information at SAP.com

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