Example code

[Former Member]

Hi all,

Could anybody please give me sample code for java mapping ??

Thanks & Regards,

Nandini

[Former Member · Accepted solution]

There are a lot of articles in SDN on JAVA mapping.

Just try following this link

Regards,

Jai Shankar

[Former Member · Accepted solution]

Hi jai,

Can you please verify the code in my previous post ??

Thanks,

Nandini

[Former Member]

Hi Nandini,

Refer these links...

http://help.sap.com/saphelp_nw04/helpdata/en/e2/e13fcd80fe47768df001a558ed10b6/content.htm

/people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs

/people/swaroopa.vishwanath/blog/2005/06/29/generic-approach-for-validating-incoming-flat-file-in-sap-xi--part-ii

Regards,

Uma

[Former Member]

Hi ,

Check this...

package com.sap.pack;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;


import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class JavaMap extends DefaultHandler implements StreamTransformation {
public static void main(String args[]) {
	try {
	FileInputStream fi = new FileInputStream("D:/java.ip.xml");
	FileOutputStream fo = new FileOutputStream("D:/op.xml");
	JavaMap imap = new JavaMap();
	imap.execute(fi,fo);
	fi.close();
	fo.close();
	} catch (Exception e) {
	e.printStackTrace();
	}
}
	private OutputStream arg1;
	private Map map;
	private int tag;
	public void setParameter(Map arg0) {
	map = arg0;
	}
	private void execute(FileInputStream fi, FileOutputStream fo) throws StreamTransformationException  
	{
		DefaultHandler handler = this;
		SAXParserFactory spf = SAXParserFactory.newInstance();
		SAXParser sp= spf.newSAXParser();
		sp.parse(fi,handler);		
	}

public void startDocument() throws SAXException
{
	write("<?xml version='1.0' encoding='UTF-8'?>");
	System.out.println("<?xml version='1.0' encoding='UTF-8'?>");	
		
}
private void write(String string) throws SAXException, IOException{
	// TODO Auto-generated method stub
	arg1.write(string.getBytes());
	arg1.flush();	
}
public void endDocument ()throws SAXException
{
arg1.flush();	
}

public void startElement(String uri,String sname,String qname,Attributes attribute) throws SAXException 
	{
		String name=sname;
		if (name.equals(""))
		{
		name=qname;	
		}
		else if(name.equals("<b>Src_MT</b>"))
		{
			tag=5;
	write("<ns:Dest_MT xmlns:ns="+""http:\JavaMapping_test""+">");
					
		}
		else if(name.equals("Emp_Name"))
		{
			tag=1; 
		}
		else if(name.equals("Emp_No"))
		{
			tag=2;
		}
		else tag=3;
}

public void endElement(String uri,String sname,String qname) throws SAXException
{
	String name=sname;
	if (name.equals(""))
			{
			name=qname;	
			}
	else if(name.equals("Emp_Name"))
			{
				tag=1;
				write("</Ename>");
				 
			}
	else if(name.equals("Emp_No"))
				{
				tag=2;
				write("</Eno>");
				}
			else if(name.equals("<b>Src_MT</b>"))
			{
	tag=5;
	write("<ns:Dest_MT xmlns:ns="+""http:\JavaMapping_test""+">");
			 
			}
    }
   
   public void characters(char[]ch,int start,int length) throws SAXException
   { 	
   	 String s=new String(ch,start,length);
   	 System.out.println("characters:"+ s);
   	 switch(tag)
   	 {
   	 	case 1:
   	 	       write(s);
			
   	 	case 2:
	 	      write(s);
			System.out.println("char :"+ s);

			
   	 	case 3:
   	 	       
				write(s);
			System.out.println("char :"+ s);
			 
   	 }
   }
}

[Former Member]

Hi,

The execute statement signature is not correct.

It should be

public void execute(InputStream fi, OutputStream fo) throws StreamTransformationException

and also import statements are missing like...

import com.sap.aii.mapping.api.StreamTransformation;

import com.sap.aii.mapping.api.StreamTransformationException;

Exceptions are not handled for many statements using SAX parser.

Check the code using any IDE (NWDS or Eclipse). It will easy to find errors.

Regards,

Uma

[Former Member]

hi Nandini,

please check

/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-i

/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-ii

/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-iii

Hope this help

Francesco