In Java Mapping Whether to SAX or DOM ?

While implementing Java Mapping which of the following SAX , DOM parsers is the most efficient way to implement it.
I mean considering the voulume of data in the XML format is large which usage will give me most optimal performance .
It would be nice if someone could give a sample most optimal java code using JAXP where input stream is read and after processing written to output stream.
regards
Nilesh Taunk.

Hi Nilesh,
>>>While implementing Java Mapping which of the following SAX , DOM parsers is the most efficient way to implement it.
there's no one good answer fot this question
except: it depends:)
SAX and DOM are a little different parsers
so it depends what will your java mapping
have to do: if it will change the
structure or maybe it will only change a few tags,
or maybe it will do something else
have a look at the page below to read a simple
comparision between SAX and DOM
http://www.scit.wlv.ac.uk/~jphb/cp2101/week4/XML_Parsing.html
or this thread:
http://www.biglist.com/lists/xsl-list/archives/200301/msg01318.html
they will give you some idea which one to choose
depending on your requirements
BTW
remember use java mappings only
if you cannot use graphical mapping (very easy debugging)
and if your document cannot be parsed (maybe huge documents)
with XSLT which is supported by many graphilal tools
Regards,
michal
<a href="/people/michal.krawczyk2/blog/2005/06/28/xipi-faq-frequently-asked-questions">XI FAQ - Frequently Asked Questions</a>

Similar Messages

Java skills for XI java mapping

I don't want to be novice in Java, wanted to know what is the minimum Java knowledge needed for doing medium complex java mapping. I have done C++ programming during grad school, comfortable with ABAP programming. Please point to books to gain "XI java mapping for dummies". I've started with sun tutorial, but it covers all topics which is difficult to achieve in a short period as my intention was to cover as much XI with java skill to do java mapping. Also I hear SAX and DOM parsers for mapping between source and target in the forum but don't have sufficient background. Thanks in advance

Hi,
You can go thro the java mapping code in these blogs:
Java mapping blog series:
/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
/people/stefan.grube/blog/2006/10/23/testing-and-debugging-java-mapping-in-developer-studio
/people/rahul.nawale2/blog/2006/07/18/java-mapping-an-alternate-way-of-reading-a-csv-file
/people/venkataramanan.parameswaran/blog/2006/12/12/java-mapping-to-handle-flat-files-in-sap-xi
Regarding SAX and DOM there are lot of threads discussing the same issue.
In Java Mapping Whether to SAX or DOM ?
Regards,
P.Venkat

Tips on how to write efficient java code for java mapping

hi
I do not have much knowledge in Java
Can anybody tell me some tips on how to write efficient and optimised java code to be used in java mapping
Thanks,
Loveena

hi D'za,
JAVA in xi
A very important place where you will use JAVA in XI is while doing your Mapping. There will be cases when JAVA MAPPING is the best solution to go for. There are 2 types of Parsers available for JAVA Mapping. DOM Parser and SAX parser. Just got through the following links to understand more on Java Mapping and the APIs available.http://java.sun.com/j2se/1.4.2/docs/api/javax/xml/parsers/package-summary.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/Document.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html /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
JAVA mapping -
/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 /people/ravikumar.allampallam/blog/2005/06/24/convert-any-flat-file-to-any-idoc-java-mapping /people/amol.joshi2/blog/2006/03/10/think-objects-when-creating-java-mappings /people/sameer.shadab/blog/2005/09/29/testing-abap-mapping
sample code for java mapping
Re: Example code DOM PARSER API -
http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html DOM --- /people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs tutorial sax and dom
For a tutorial on the methods of SAX and DOM http://java.sun.com/webservices/docs/1.1/tutorial/doc/
SAX AND dom PARSER ( BY thorsten) -
example /people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs java mapping example ( testing and debugging) /people/stefan.grube/blog/2006/10/23/testing-and-debugging-java-mapping-in-developer-studio
regards
biplab
Use a Good Subject Line, One Question Per Posting - Award Points

JAVA mapping using SAX parser adds extra tags

Hi,
We are using java mapping using a SAX parser.It works well in standalone application ie it parses correctly and gets our desired xml structure and the xml is well formed too but when we import it in XI as a jar file it does not throw any errors but adds extra start tags, as a result the output xml is not well formed.XI is adding extra start tags.
If any one else has faced a similar situation please help.
Regards,
Anirban.

Hi Roberto,
Thank you for the response.
As I said, it doesnt throw any error. It is working perfectly in standalone application. But when we deploy it to XI Server, it is not forming the well formed XML. We too are puzzled by this situation.
Okay, i will explain my scenario here.
The following is my input XML to the java pgm..
<Header>
</Header>
<Body>
</Body>
<SubBody1>
</SubBody1>
<SubBody2>
</SubBody2>
<SubBody3>
</SubBody3>
<SubBody4>
</SubBody4>
<Trail>
</Trail>
The desired output is
<Header>
<Body>
<NameChanged1>
<NameChanged2>
<SubBody3>
<SubBody4>
</SubBody4>
</SubBody3>
</NameChanged2>
</NameChanged1>
<Trail>
</Trail>
Just look at the SubBody2 and SubBody1 node, its tag name has been changed in the output XML. Thats y i have decided to use java mapping instead of message mapping.
I have developed the code for everything, i.e for changing the tag name and for forming the nested xml and it is working fine as a standalone application. But while deploying it to XI, the output is not well formed. I dont know the reason for it. Even I have checked the cardinality of the output Data types, that I have created. Its perfectly okay with all.
Any Ideas???
Regards,
Anirban

Java Mapping Using DOM Parser.

Hi Experts,
I am new to Java mapping and i have followed the link
http://scn.sap.com/thread/3173071 and it is working fine. It is for only one item. I have tried to modify the code and i placed a for loop to go create the Output Node based on the No of Input Nodes and it is giving the error as below. But my requirement is
Input.xml : -
<?xml version="1.0" encoding="UTF-8" ?>
<ns0:DT_Source xmlns:ns0="urn:java_mapping2">
<Person1>
      <Name>Alex</Name>
      <Surname>Stewart</Surname>
</Person1>
<Person1>
      <Name>Sam</Name>
      <Surname>Abdreson</Surname>
</Person1>
</ns0:DT_Source>
Output.xml:-
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<ns0:DT_Target xmlns:ns0="urn:java_mapping2">
<Person2>
     <EmpName>
          <Emp>Alex Stewart</Emp>
</EmpName>
</Person2>
<Person2>
     <EmpName>
          <Emp>Sam Abdreson</Emp>
</EmpName>
</Person2>
</ns0:DT_Target>
I am unable to get the output. I am getting the following error.
org.w3c.dom.DOMException: HIERARCHY_REQUEST_ERR: An attempt was made to insert a node where it is not permitted.
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.insertBefore()
at com.sun.org.apache.xerces.internal.dom.NodeImpl.appendChild()
Please suggest me how i can resolvoe this error.
Regards,
GIRIDHAR

Complete code
package test;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import com.sap.aii.mapping.api.AbstractTransformation;
import com.sap.aii.mapping.api.StreamTransformationException;
import com.sap.aii.mapping.api.TransformationInput;
import com.sap.aii.mapping.api.TransformationOutput;
import java.io.IOException;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class RemoveTag extends AbstractTransformation {
    public void execute(InputStream in,OutputStream out) throws StreamTransformationException, SAXException, IOException {
        try
             DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
             DocumentBuilder builderel=factory.newDocumentBuilder();
             /*input document in form of XML*/
             Document docIn=builderel.parse(in);
             /*document after parsing*/
             Document docOut=builderel.newDocument();
             TransformerFactory tf=TransformerFactory.newInstance();
             Transformer transform=tf.newTransformer();
             Element root,child,child1,child2;
             Node textChild;
             Node name,surname;
             String fullname="";
             root=docOut.createElement("ns0:DT_Target");
             root.setAttribute("xmlns:ns0","urn:java_mapping2");
             NodeList nList = docIn.getElementsByTagName("Person1");
             for (int temp = 0; temp < nList.getLength(); temp++)
            child1=docOut.createElement("Person2");
             child=docOut.createElement("EmpName");
             child2=docOut.createElement("Emp");
             child.appendChild(child2);
             child1.appendChild(child);
             root.appendChild(child1);
             name=docIn.getElementsByTagName("Name").item(temp);
             surname=docIn.getElementsByTagName("Surname").item(temp);
             fullname=name.getFirstChild().getNodeValue()+" ";
             fullname+=surname.getFirstChild().getNodeValue();
             textChild=docOut.createTextNode(fullname);
             child2.appendChild(textChild);
             docOut.appendChild(root);
             transform.transform(new DOMSource(docOut), new StreamResult(out));
        catch(Exception e)
             e.printStackTrace();
    public static void main(String[] args) {
        try{
            RemoveTag genFormat=new RemoveTag();
             FileInputStream in=new FileInputStream("C:\\Users\\Desktop\\aa.xml");
             FileOutputStream out=new FileOutputStream("C:\\Users\\Desktop\\output1.xml");
             genFormat.execute(in,out);
        catch(Exception e)
             e.printStackTrace();
@Override
public void transform(TransformationInput arg0, TransformationOutput arg1)
throws StreamTransformationException {
// TODO Auto-generated method stub
try {
    this.execute(arg0.getInputPayload().getInputStream(), arg1.getOutputPayload().getOutputStream());
} catch (SAXException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();

Namespace missing in java mapping DOM ?

Hi,
I am creating java mapping using DOM, but why i cannot create a namespace using this code ?
Document targetDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
Node docRoot = targetDoc.appendChild(targetDoc.createElementNS("urn:sap-com:atp:ABC40:base", "ns1:Vendor_SQL"));
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// create source and result wrappers and perform transformation
DOMSource source = new DOMSource(targetDoc);
StreamResult result = new StreamResult(outputStream);
transformer.transform(source, result);
expected result in xml :
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Vendor_SQL xmlns:ns0="urn:sap-com:atp:ABC40:base">
</ns0:Vendor_SQL>
result :
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Vendor_SQL>
</ns0:Vendor_SQL>
Please advise whether i was missing any other required step ?
Note : testing using NWDS 7.0 SP 17
Thank You and Best Regards
Fernand

Hi Lesmana,
Can you change the second line in the code like below and give a try::
Node docRoot = targetDoc.appendChild(targetDoc.createElementNS("ns1:urn:sap-com:atp:ABC40:base", "ns1:Vendor_SQL"));
Regards,
---Saish

Java Mapping using DOM

Hi All,
I need Java mapping help. I will get incomming payload as following
<orders>
<matnr>123</matnr>
<qty>10</qty>
</orders>
i need to change the above payload as follows
<ns0:orders>
<ns0:matnr>123</ns0:matnr>
<ns0:qty>10</ns0:qty>
</ns0:orders>
Please help me how to achieve this using Java mapping.
Regards
Vijay

Hi,
Dom will be quite expensive for this type of requirement since you will have to go to each element and then append the namespace.
I suggest you use SAX parser which is more efficient for such requirement.
The code is given below you can modify it according to your requirement.
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.FactoryConfigurationError;
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 SAXDemo extends DefaultHandler{
     public StringBuffer sb = new StringBuffer();
     public String PREFIX = "ns0:";
     int count = 1;
     public static void main(String[] args)
          SAXDemo demo= new SAXDemo();
          demo.saxdemo();
          System.out.println();
     public void saxdemo()
          InputStream in;
          try
               in = new FileInputStream(new File("Input.xml"));
               SAXParserFactory factory = SAXParserFactory.newInstance();
               factory.setNamespaceAware(true);
               factory.setValidating(false);
               SAXParser saxParser = factory.newSAXParser();
               * Parse the content of the given {@link java.io.InputStream}
               * instance as XML using the specified
               * {@link org.xml.sax.helpers.DefaultHandler}.
               * @param inputstream InputStream containing the content to be parsed.
               * @param cobject The SAX DefaultHandler to use.
               * @exception IOException If any IO errors occur.
               * @exception IllegalArgumentException If the given InputStream is null.
               * @exception SAXException If the underlying parser throws a
               * SAXException while parsing.
               saxParser.parse(in, this);
               System.out.println(sb.toString());
          catch (FactoryConfigurationError e)
               e.printStackTrace();
          catch (ParserConfigurationException e)
               e.printStackTrace();
          catch (SAXException e)
               e.printStackTrace();
          catch (IOException e)
               e.printStackTrace();
     public void startDocument()throws SAXException
     public void endDocument()throws SAXException
     public void startElement(String namespaceURI, String name, String qName, Attributes attrs)
     throws SAXException
          if(count == 1)
               sb.append("<"+PREFIX+qName+" "+PREFIX+"xmlns="+namespaceURI+">");
          else
               sb.append("<"+name+">");
          count ++;
     public void endElement(String uri, String name, String qName) throws SAXException
          sb.append("</"+qName+">");
     public void characters(char buf[], int offset, int len)
     throws SAXException
          String s = new String(buf, offset, len);
          buf = null;
          sb.append(s.trim());
               s = null;
Regards
Fariha

Problem in SAX Java mapping

Hi,
I'm using SAX Java mapping in one scenario. Problem is when I get some Croatina characters, like Đ or u0160,
output XML is not valid. XML Spy complains, IE complains and so on. Customer is sure that data ( XML in CLOB field in Oracle DB) is UTF-8? What could be a problem?
What I'm doing is reading entire XML into string with help of BufferedReader, then do some manipulation and write String into byte array with:
               byte[] bytes = file.toString().getBytes("UTF-8");
               saxParser.parse(new ByteArrayInputStream(bytes), handler);
and then of course parse XML. readLine method reads data and problematic is "Ä�" - ￯0 - 0xC490.
For this character XML Spy doesn't complain, IE also. After conversion, this character looks like "Ä?" - 0xC43F, and this is not good any more. Why?

Hi Stefan,
I've finally done it. Code as foollws:
     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();
               fStreamOut = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
               encoding = "UTF-8";
               if (map != null) {
                    mappingTrace = (MappingTrace) map
                              .get(StreamTransformationConstants.MAPPING_TRACE);
               InputStreamReader is = new InputStreamReader(in, "UTF8");
               BufferedReader reader = new BufferedReader(is);
               StringBuffer file = new StringBuffer();
               String line = new String();
               try {
                    while ((line = reader.readLine()) != null) {
                         file.append(line);
               } catch (IOException e) {
                    e.printStackTrace();
               } finally {
                    try {
                         in.close();
                    } catch (IOException e) {
                         e.printStackTrace();
               Date d4 = new Date();
               file = replaceREGEX(
                         "<\\?xml version=\"1\\.0\" encoding=\"UTF-8\"\\?>", "",
                         file);
               char[] cArray = file.toString().toCharArray();
               Date filedat = new Date();;
               SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd_HHmmss_SSS");
               String fName = df.format(filedat) + "_El_Invoice.xml";
               Writer out1 = new BufferedWriter(new OutputStreamWriter(
                         new FileOutputStream(fName), "UTF8"));
               try {
                    out1.write(file.toString().toCharArray());
                    out1.close();
               } catch (UnsupportedEncodingException e) {
               } catch (IOException e) {
               saxParser.parse(fName, handler);
               File outFile = new File(fName);
               outFile.delete();
          } catch (Throwable t) {
               if (mappingTrace != null) {
                    mappingTrace.addInfo(t.toString());
               t.printStackTrace();
problem was also in method for writing in output stream, so I've changed it:
     private void printOutPut(String sOP) {
          try {
                  //    fStreamOut.write(sOP.getBytes());
               fStreamOut.write(sOP);
          } catch (IOException e) {
               e.notify();

Context change by DOM parsing Java Mapping in XI

Hi Team,
I would like to know that how can I handle Context Change by DOM Parser Java Mapping in XI.?
Suppose the source XML structure I have like below:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:Header xmlns:ns0="urn:bp:xi:hr:edm:test:100">
   <FileName>
      <filesub>
         <subname>a</subname>
         <subname>b</subname>
         <subname>c</subname>
      </filesub>
   </FileName>
   <FileName>
      <filesub>
         <subname>d</subname>
         <subname>e</subname>
         <subname>f</subname>
      </filesub>
   </FileName>
</ns0:Header>
Where the field FileName can occur maximum thrice(0...3) but the subname field is (0....unbounded) but in the target source I would like to have as given below:
<?xml version="1.0" encoding="UTF-8" ?>
- <MT_Test4 xmlns="urn:bp:xi:hr:edm:test:100">
- <Header>
<FileName>a</FileName>
<FileName1>d</FileName1>
    </Header>
- <Header>
<FileName>b</FileName>
<FileName1>e</FileName1>
   </Header>
Header>
<FileName>c</FileName>
<FileName1>f</FileName1>
   </Header>
</MT_Test4>
That means the first value from every context of the source field is forming my first and second value in my target first context.Thensecond value from every context is forming my 1st and 2nd value of my target 2nd context and finally 3rd value of every context is forming my 1st and 2nd value of my target 3rd context.Is this possible to done through DOM parsing or we have to do it by UDF only?

Hi Atanu,
    In my last post I gave an alogorithm to solve the mapping problem. Here is the complete program for the mapping.
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
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;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationException;
public class DOMParser1 implements StreamTransformation{
     public void execute(InputStream in, OutputStream out)
               throws StreamTransformationException {
          try
               DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
               DocumentBuilder builderel=factory.newDocumentBuilder();
               /input document in form of XML/
               Document docIn=builderel.parse(in);
               /document after parsing/
               Document docOut=builderel.newDocument();
               TransformerFactory tf=TransformerFactory.newInstance();
               Transformer transform=tf.newTransformer();
               Element root,child,child1=null;
               Node textChild;
               NodeList l;
               int i,n1,j,div,k;
               String s[];
               root=docOut.createElement("MT_Test4");
               root.setAttribute("xmlns","urn:bp:xi:hr:edm:test:100");
               l=docIn.getElementsByTagName("subname");
               n1=l.getLength();
               s=new String[n1];
               for(i=0;i<n1;++i)
                         s<i>=l.item(i).getFirstChild().getNodeValue();
               l=docIn.getElementsByTagName("filesub");
               div=l.getLength();
               j=n1/div;
               for(i=0,k=0;i<j;++i)
                    child1=docOut.createElement("Header");
                    root.appendChild(child1);
                    child=docOut.createElement("FileName");
                    textChild=docOut.createTextNode(s[k]);
                    child.appendChild(textChild);
                    child1.appendChild(child);
                    child=docOut.createElement("FileName1");
                    textChild=docOut.createTextNode(s [ k + j ]);
                    child.appendChild(textChild);
                    child1.appendChild(child);
                    ++k;
               docOut.appendChild(root);
               transform.transform(new DOMSource(docOut), new StreamResult(out));
          catch(Exception e)
               e.printStackTrace();
     public void setParameter(Map arg0) {
     public static void main(String[] args) {
          try{
               DOMParser1 genFormat=new DOMParser1();
               FileInputStream in=new FileInputStream("C:/Apps/my dw/sdnq/apps.xml");
               FileOutputStream out=new FileOutputStream("C:/Apps/my dw/sdnq/tgt1.xml");
               genFormat.execute(in,out);
          catch(Exception e)
               e.printStackTrace();
source -> apps.xml
<?xml version="1.0" encoding="UTF-8" ?>
- <ns0:Header xmlns:ns0="urn:bp:xi:hr:edm:test:100">
- <FileName>
- <filesub>
<subname>a</subname>
<subname>b</subname>
<subname>c</subname>
</filesub>
</FileName>
- <FileName>
- <filesub>
<subname>d</subname>
<subname>e</subname>
<subname>f</subname>
</filesub>
</FileName>
</ns0:Header>
target structure -> tgt1.xml
<?xml version="1.0" encoding="UTF-8" ?>
- <MT_Test4 xmlns="urn:bp:xi:hr:edm:test:100">
- <Header>
<FileName>a</FileName>
<FileName1>d</FileName1>
</Header>
- <Header>
<FileName>b</FileName>
<FileName1>e</FileName1>
</Header>
- <Header>
<FileName>c</FileName>
<FileName1>f</FileName1>
</Header>
</MT_Test4>
Hope this helps
one more thing in this line "textChild=docOut.createTextNode(s k + j );"   somehow the the third braces one opening before k and one closing after j is missing for unknown reasons. Please correct it when you actually run this code.
regards
Anupam
Edited by: anupamsap on Mar 7, 2011 12:47 PM

JAVA Mapping: Convert a W3C DOM into OutputStream

hi everybody,
how do I convert a org.w3c.dom.Document into outputStream as needed in JAVA mapping?
Thanks regards
Mario

Hi Mario,
even if you already found the solution, I think the information may be useful to others.
You could do something like:
import org.w3c.dom.Document;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
Document doc;
try {
     TransformerFactory tf = TransformerFactory.newInstance();
     Transformer trans = tf.newTransformer();
     trans.transform(new DOMSource(doc), new StreamResult(out));
} catch (TransformerConfigurationException e) {
     // Implement exception handling
} catch (TransformerException e) {
     // Implement exception handling
Regards,
Henrique.

JAVA Mapping with SAX: Illegal character exception &

Hi everybody,
I use a SAX JAVA Mapping. It throws an error cause the xml that is parsed has a
&
like in
<D_3036>Company & Co. KG</D_3036>
Does anybody know how to solve the problem?
I do not want to replace the
&
Are there special settings/properties for the handler/parser?
Thanks
Regards
Mario

Hi all,
thanks for your comments and suggestions. The error was not cause by the problem I describes.
FYI:
If there is an ampersand in the middle of a string, than the standard method
characters
in the handler is called three times!
This let me asume the ampersand was the error.
Regards Mario
Edited by: Mario Müller on Dec 19, 2008 1:23 AM

JAVA Mapping (DOM)

Hi Guys,
Can i test my JAVA Mapping (DOM).
I create all coding as per the requirment . Is it a way that in the NWDS in can give input XML Document and test there in Eclipse before am using it in the XI Mapping.
How to pass "InputStream in" XML document and read the output.
Am bit new to JAVA programing.
If there is anyu way plz do provide me an idea , that help me in debigging well my JAVA Programing
regards
Srinivas

hi venkateshwarulu
check the below blogs
XI Java Mapping Helper (DOM)
The specified item was not found.
Think objects when creating Java mappings
Think objects when creating Java mappings
Testing and Debugging Java Mapping
Testing and Debugging Java Mapping in Developer Studio
reward pionts if helpfull
regards
kummari
Edited by: kummari on Jul 9, 2008 7:28 AM
Edited by: kummari on Jul 9, 2008 7:51 AM

XI java mapping using SAX

Hi,
im using java mapping for complex IDOC structure. If I run program localy, it works great, but when XI runs mapping, I have problems with xml file, some elements are not there ?! I don't know why it happens.....i said that i'm using complex logic, and therefore I'm using complex IF statments to produce segment in IDOC. I have noticed that there is a problem, because when I switch off IF, everything is fine???? any idea??
thx mario

Hi,
Do you have nested 'if' statements? Is it possible you could be experiencing a "dangling else" problem?
http://www.dai-arc.polito.it/dai-arc/manual/tools/jcat/main/node101.html

JAVA mapping error

Hi All,
I am getting the below error while executing a JAVA mapping.
<SAP:Category>Application</SAP:Category>
<SAP:Code area="MAPPING">LINKAGE_ERROR</SAP:Code>
<SAP:P1>XMLNSTagCreate1/XMLNSTagCreate1</SAP:P1>
<SAP:P2>java.lang.NoClassDefFoundError: XMLNSTagCreate1/XM</SAP:P2>
<SAP:P3>LNSTagCreate1 (wrong name: XMLNSTagCreate1)</SAP:P3>
<SAP:P4 />
<SAP:AdditionalText />
<SAP:Stack>Linkage error while loading class XMLNSTagCreate1/XMLNSTagCreate1; java.lang.NoClassDefFoundError: XMLNSTagCreate1/XMLNSTagCreate1 (wrong name: XMLNSTagCreate1)</SAP:Stack>
<SAP:Retry>M</SAP:Retry>
I have tried compiling the code in the same JRE as the one in PI. Still it is not working.
Please suggest.
Regards,
Yashwanth
Edited by: YashwanthSVK on Aug 17, 2011 8:38 PM

Hi all... thank you for the replies.. I have compiled the code in the same version of JRE as the PI version...
Hi Vijay,
I also felt the same but as I do not have much knowledge in JAVA, i could not track it further.
below is the code for the mapping... would you mind if I ask you to have a look at it and let me know where the error is..
thank you so much ...
import java.io.*;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerFactory;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import com.sap.aii.mapping.api.MappingTrace;
import com.sap.aii.mapping.api.StreamTransformation;
import com.sap.aii.mapping.api.StreamTransformationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileWriter;
This mapping creates xmlns attribute to send to Tradeplace
public class XMLNSTagCreate1 extends DefaultHandler implements StreamTransformation {
     private Map param;
     private MappingTrace trace;
     private OutputStream out;
     public void execute(InputStream in, OutputStream out)
          throws StreamTransformationException {
               DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
                    try {
                         //trace.addWarning("Execute function starts here");
                         DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
                         try {
                              org.w3c.dom.Document doc = docBuilder.parse(in);
                              //Node TradeplaceMessage = doc.getFirstChild();
                              Element trade=(Element) doc.getFirstChild();
                              if(trade.hasAttribute("tag1"))
                              NamedNodeMap TradeplaceMessageAttributes = trade.getAttributes();
                              String xmlnsValue=trade.getAttribute("tag1");
                              String modeValue=trade.getAttribute("productionMode");
                                  trace.addInfo("XMLNS Value:"+xmlnsValue);
                                                                 trade.removeAttribute("tag1");
                                   trade.removeAttribute("productionMode");
                                   trade.setAttribute("xmlns",xmlnsValue);
                                   trade.setAttribute("productionMode",modeValue);
                                                  javax.xml.transform.Transformer transformer = TransformerFactory.newInstance().newTransformer();
                                                  transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                                                  StreamResult result = new StreamResult(new StringWriter());
                                                  DOMSource source = new DOMSource(doc);
                                                  transformer.transform(source, result);
                                                  String xmlString = result.getWriter().toString();
                                                  //System.out.println(xmlString);
                                                  out.write(xmlString.getBytes());
                         } catch (SAXException e1) {
                              // TODO Auto-generated catch block
                              e1.printStackTrace();
                         } catch (IOException e1) {
                              // TODO Auto-generated catch block
                              e1.printStackTrace();
                         } catch (TransformerConfigurationException e) {
                              // TODO Auto-generated catch block
                              e.printStackTrace();
                         } catch (TransformerFactoryConfigurationError e) {
                              // TODO Auto-generated catch block
                              e.printStackTrace();
                         } catch (TransformerException e) {
                              // TODO Auto-generated catch block
                              e.printStackTrace();
                    } catch (ParserConfigurationException e) {
                         // TODO Auto-generated catch block
                         e.printStackTrace();
     public static void main2(String[] args) throws Exception {
          String xmlFile = "U:
Untitled.xml";
          InputStream in = new BufferedInputStream(new FileInputStream(xmlFile));
          XMLNSTagCreate1 test = new XMLNSTagCreate1();
          //test.countOccurences(in);
     public static void main(String[] args) throws Exception {
          String xmlFile = "//NA.AD.WHIRLPOOL.COM//myApps//home//NA//qqjos1d//My Documents//TP2.xml";
          InputStream in = new BufferedInputStream(new FileInputStream(xmlFile));
          FileOutputStream out = new FileOutputStream("//NA.AD.WHIRLPOOL.COM//myApps//home//NA//qqjos1d//My Documents//DhanishTP2.xml");
          XMLNSTagCreate1 test = new XMLNSTagCreate1();
          test.execute(in, out);
          OutputStreamWriter out1 = new OutputStreamWriter(out,"UTF-8");
     /* (non-Javadoc)
@see com.sap.aii.mapping.api.StreamTransformation#setParameter(java.util.Map)
     public void setParameter(Map param) {
          // TODO Auto-generated method stub

XML - SAX or DOM?

Hi folks,
I'm on the verge of emotional breakdown trying to get my head around working with XML in Java, and I would really appreciate a bit of help.
What I would like to do is to store database metadata in an XML file.
The steps I have taken so far are to read the metadata into a structure of objects (a metadata object that containts arraylists of tables objects that contain arraylists of columns object. Each of these object types holds information about the table or column concerned (table name, column type etc).
I'm stuck when it comes to deciding whether to use SAX or DOM to write / read these files.
Now, I understand that SAX is for sequential access, and DOM is for situations where you'd like to manipulate the XML tree. I guess that, given the nature of my data structure DOM would make more sense? Then I can define a node for each table, then off them, define a node for each column... Or am I missing the point here?
Can anyone give me a nudge in the right direction?
Thanks in advance
s.

Thanks for replying!
Duffymo, I'd rather keep the xml content to the data
to make the files easy to edit / write by hand.Not following you here.
I understand that you want XML files, but XStream can take them and turn them into Java objects for you. Conversely, you can take a graph of Java objects and serialize them as XML.
No worries about DOM or SAX that way.
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In Java Mapping Whether to SAX or DOM ?

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