Exception in Java Mapping

Question

hi All,
I'm trying to validate the incoming XML against a given XSD using Java Mapping.. When i execute it i get the following error in the Mapping...
com.sap.engine.lib.xml.util.NestedException -> com.sap.engine.lib.xml.parser.ParserException -> java.io.IOException: Parsing an empty source. Root element expected!
Please do help me out..... I have given my java Code Below.....
Note:The XSD is attached in the same zip file which contains java class and the zip file is imported in the Imported ARchive Area....
package cts.com.XSD;
import java.io.*;
import java.util.Map;
import com.sap.aii.mapping.api.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
public class TestJavaMapping implements StreamTransformation
     Map param=null;
     public void setParameter(Map arg0)
          this.param=arg0;
     public  void execute(InputStream in, OutputStream out) throws StreamTransformationException
     byte b[];
     byte b1[];
     try
           b = new byte[in.available()];
           in.read(b);
              AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
           InputStream Schemainput= new
TestJavaMapping().getClass().getClassLoader().getResourceAsStream("cts/com/XSD/ShipmentDetails.xsd");
     b1 = new byte[Schemainput.available()];
     Schemainput.read(b1);
     String XsdString =new String(b1);
     trace.addInfo("XSD obtained");
     DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
     docBuilderFactory.setNamespaceAware(true);
     docBuilderFactory.setValidating(true);
     trace.addInfo("After Setting True");
docBuilderFactory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage","http://www.w3.org/2001/XMLSchema");
docBuilderFactory.setAttribute( "http://java.sun.com/xml/jaxp/properties/schemaSource",XsdString);
trace.addInfo("After Setting ATtribute");
          trace.addInfo("B4 Parsing");
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
          Document validDoc = docBuilder.parse(in);     
          trace.addInfo("After Parsing");
          out.write(b);
     catch(Exception e)
          AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
          trace.addInfo(e.getMessage());

Answer 1

Hi Thorsten,
Thanks for the Suggestion of using SAX instead of DOM... i even tried using SAX parser i get "Generic Exception"..i have give the code below.. please do help me out..
package cts.com.XSD;
import java.util.Map;
import java.io.*;
import com.sap.aii.mapping.api.AbstractTrace;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationConstants;
import com.sap.aii.mapping.api.StreamTransformationException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import org.w3c.dom.Document;
public class TestJavaMapping implements StreamTransformation
     Map param=null;
     public void setParameter(Map arg0)
          this.param=arg0;
     public  void execute(InputStream in, OutputStream out) throws StreamTransformationException
          try
                SAXParserFactory factory = SAXParserFactory.newInstance();
                factory.setNamespaceAware( true);
                factory.setValidating( true);
InputStream Schemainput = new
TestJavaMapping().getClass().getClassLoader().getResourceAsStream("cts/com/XSD/ShipmentDetails.xsd");               
                  SAXParser parser = factory.newSAXParser();
                parser.setProperty( "http://java.sun.com/xml/jaxp/properties/schemaLanguage",
                                                            "http://www.w3.org/2001/XMLSchema");
                parser.setProperty( "http://java.sun.com/xml/jaxp/properties/schemaSource",Schemainput);
                byte b[]=new byte[in.available()];
                in.read(b);
                XMLReader reader = parser.getXMLReader();
                  reader.parse(new String(b));
                out.write(b);
          catch ( ParserConfigurationException e)
               AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
               trace.addInfo(e.getMessage());
          catch ( SAXException e)
               AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
               trace.addInfo(e.getMessage());
          catch ( IOException e)
                 AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
               trace.addInfo(e.getMessage());
          catch(Exception e)
               AbstractTrace trace=(AbstractTrace)param.get(StreamTransformationConstants.MAPPING_TRACE);
               trace.addInfo(e.getMessage());