javaMapping in PI 7.1 Error:Unable to display tree view; Error when parsing

[Former Member]

hi,

i get by testing in PI 7.1 (operation mapping) this ERROR:

"Unable to display tree view; Error when parsing an XML document (Content is not allowed in prolog.)"

this is my java-programm-code:

import java.io.FileInputStream;

import java.io.FileOutputStream;

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

import java.io.*;

import java.util.Map;

import javax.xml.parsers.*;

import org.xml.sax.*;

import org.xml.sax.helpers.*;

/*IMPORT statement imports the specified classes and its methods into the program */

/Every Java mapping program must implement the interface StreamTransformation and its methods execute() and setParameter() and extend the class DefaultHandler./

public class Mapping extends DefaultHandler implements StreamTransformation {

/*

• Below is the declaration for all the variables we are going to use in the

• subsequent methods.

*/

private Map map;

private OutputStream out;

private boolean input1 = false;

private boolean input2 = false;

private int number1;

private int number2;

private int addvalue;

private int mulvalue;

private int subvalue;

String lineEnd = System.getProperty("line.separator");

/*

• setParamater() method is used to store the mapping object in the variable

• "map"

*/

public void setParameter(Map param) {

map = param;

}

public void execute(InputStream in, OutputStream out)

throws com.sap.aii.mapping.api.StreamTransformationException {

DefaultHandler handler = this;

SAXParserFactory factory = SAXParserFactory.newInstance();

try {

SAXParser saxParser = factory.newSAXParser();

this.out = out;

saxParser.parse(in, handler);

} catch (Throwable t) {

t.printStackTrace();

}

}

/*

• As seen above execute() method has two parameters "in" of type

• InputStream and "out" of type OutputStream. First we get a new instance

• of SAXParserFactory and from this one we create a new Instance of

• SAXParser. To the Parse Method of SaxParser, we pass two parameters,

• inputstream "in" and the class variable "handler".

*/

/*

• Method "write" is a user defined method, which is used to write the

• string "s" to the outpurstream "out".

*/

private void write(String s) throws SAXException {

try {

out.write(s.getBytes());

out.flush();

} catch (IOException e) {

throw new SAXException("I/O error", e);

}

}

public void startDocument() throws SAXException {

write("");

write(lineEnd);

write("");

write(lineEnd);

}

public void endDocument() throws SAXException {

write("");

try {

out.flush();

} catch (IOException e) {

throw new SAXException("I/O error", e);

}

}

public void startElement(String namespaceURI, String sName, String qName,

Attributes attrs) throws SAXException {

String eName = sName;

if ("".equals(eName))

eName = qName;

if (eName.equals("NUMBER1"))

input1 = true;

if (eName.equals("NUMBER2"))

input2 = true;

}

public void endElement(String namespaceURI, String sName, String qName)

throws SAXException {

String eName = sName;

if ("".equals(eName))

eName = qName;

if (eName.equals("NUMBER1"))

input1 = false;

if (eName.equals("NUMBER2"))

input2 = false;

}

public void characters(char[] chars, int startIndex, int endIndex)

throws SAXException {

String dataString = new String(chars, startIndex, endIndex).trim();

if (input1) {

try {

number1 = Integer.parseInt(dataString);

} catch (NumberFormatException nfe) {

}

}

if (input2) {

number2 = Integer.parseInt(dataString);

}

if (input2 == true) {

addvalue = number1 + number2;

mulvalue = number1 * number2;

subvalue = number1 - number2;

write("" + addvalue + "");

write(lineEnd);

write("" + mulvalue + "");

write(lineEnd);

write("" + subvalue + "");

write(lineEnd);

}

}

}

in developer studio 7.1 i dont get error.

this happens by testing the mapping-programm in ESR.

can somebody help me please?

[prateek]

Make sure that the xml created out after the java mapping is a valid xml with only one root node.

Regards,

Prateek

[Former Member]

Thnx

[Former Member]

also make sure that there is nothing before the xml declaration not even a space