Hi all.
In this blog i'll show my way to use 1-1 MM in 1-n OM.
What is it for?
In my case i had OM 1-1 with MM 1-1. But in one of these fine days it became necessary to change OM to 1-n.
And i change it. And realize, that it does not work with 1-1 MM.
The reason is headers of multi-mapping messages <ns0:Messages xmlns:ns0="http://sap.com/xi/XI/SplitAndMerge"><ns0:Message1></ns0:Message1</ns0:Messages>
I had two opportunities:
1. Change my MM to 1-n.
2. Clear headers from message before MM and add them after MM.
I have some reasons why i can't change my MM to 1-n. Maybe just because of laziness.
So, I wrote two Java Mappings. One clear headers, and second inserts them.
And in OM it looks like this:
----Mapping programms-----------------
Java Class : RemoveMultiNodes.java
MM: My1to1Mapping
JavaClass: InsertMultimNodes.java
-----------------------------------------
But you must be carefull. This works in Runtime, but if you want to test it through ESB, you need to test OM from second step.
Codes:
publicclassRemoveMultiNodesextends
AbstractTransformation {
@Override
publicvoidtransform(TransformationInput in, TransformationOutput out)
throws StreamTransformationException {
// TODO Auto-generated method stub
AbstractTrace trace = getTrace();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db;
try{
db = dbf.newDocumentBuilder();
Document xml_in = db.parse(in.getInputPayload().getInputStream());
StringWriter stringWriter =new StringWriter();
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT,"yes");
transformer.transform(new DOMSource(xml_in),new StreamResult(stringWriter));
String InboundXml = stringWriter.toString();//This is string data of xml file
InboundXml = InboundXml.replace("<sxi:Messages xmlns:sxi=\"http://sap.com/xi/XI/SplitAndMerge\">","");
InboundXml = InboundXml.replace("<sxi:Message1>","");
InboundXml = InboundXml.replace("</sxi:Message1>","");
InboundXml = InboundXml.replace("</sxi:Messages>","");
out.getOutputPayload().getOutputStream().write(InboundXml.getBytes("UTF-8"));
}
catch(ParserConfigurationException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch(SAXException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch(IOException e){
// TODO Auto-generated catch block
e.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();
}
}
}
Or short xslt:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheetxmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:templatematch="/">
<xsl:copy-ofselect="/*/*/*"/>
</xsl:template>
</xsl:stylesheet>------------------------------------------------------------------------------
publicclassInsertMultimNodesextends
AbstractTransformation {
@Override
publicvoidtransform(TransformationInput in, TransformationOutput out)
throws StreamTransformationException {
// TODO Auto-generated method stub
AbstractTrace trace = getTrace();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db;
try{
db = dbf.newDocumentBuilder();
Document xml_in = db.parse(in.getInputPayload().getInputStream());
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT,"yes");
StreamResult result =new StreamResult(new StringWriter());
DOMSource source =new DOMSource(node);
transformer.transform(source, result);
String xmlString = result.getWriter().toString();
StringWriter stringWriter =new StringWriter();
transformer.transform(new DOMSource(xml_in),new StreamResult(stringWriter));
String InboundXml = stringWriter.toString();//This is string data of xml file
InboundXml = InboundXml.replace("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>","");
InboundXml ="<?xml version=\"1.0\" encoding=\"UTF-8\"?>"+
"<ns0:Messages xmlns:ns0=\"http://sap.com/xi/XI/SplitAndMerge\"><ns0:Message1>"
+ InboundXml +
"</ns0:Message1></ns0:Messages>";
out.getOutputPayload().getOutputStream().write(InboundXml.getBytes("UTF-8"));
}catch(ParserConfigurationException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch(SAXException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch(IOException e){
// TODO Auto-generated catch block
e.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();
}
}
}
Or xslt: <?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheetxmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:templatematch="/">
<ns0:Messagesxmlns:ns0="http://sap.com/xi/XI/SplitAndMerge">
<ns0:Message1>
<xsl:copy-ofselect="."/>
</ns0:Message1>
</ns0:Messages>
</xsl:template>
</xsl:stylesheet>
Have fun 