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Tip of the Day
Language: Java
Expertise: Intermediate
Mar 31, 2008

Apply an Identical Transformation to a DOM Tree Using TrAX

To test your TrAX application without involving your live business processes, simply build an identical transformation. You can do this using the newTransformer() method—without any arguments. The following code is a full example that applies an identical transformation to a DOM tree:

//the XML file for this example is named book.xml

import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import javax.xml.transform.dom.*;

class DOM{

  DocumentBuilderFactory DBF=null;
  DocumentBuilder DB=null;
  Document D=null;
  Document DR=null;
  Transformer tXML=null;

  public DOM(){}
 
  public void identicalTransf(String XMLdoc)
     {
     try{
        //create a DocumentBuilderFactory
        DBF=DocumentBuilderFactory.newInstance();

        //set namesapce aware
        DBF.setNamespaceAware(true);

        //create a DocumentBuilder
        DB=DBF.newDocumentBuilder();
       
        //get the DOM tree for your XML
        D=DB.parse(new File(XMLdoc)); 
       
        //create an empty document for storing the result
        DR=DB.newDocument();
                
        //get a TransformerFactory
        TransformerFactory tfXML=TransformerFactory.newInstance();
                                   
        //get a Transformer for identical transformation 
    try{
       tXML=tfXML.newTransformer();
       }catch(javax.xml.transform.TransformerConfigurationException e)
              {System.out.println(e.getMessage());}
         
        //define the Source
        Source sXML=new DOMSource(D);
         
        //define the Result
        Result rXML=new DOMResult(DR);
                                  
        //do the transformation
        try{
           tXML.transform(sXML,rXML);
           }catch(javax.xml.transform.TransformerException e)
              {System.out.println(e.getMessage());}
                       
        //verify the result
        try{
           tXML.transform(new DOMSource(DR), 
                          new StreamResult(System.out));
           }catch(javax.xml.transform.TransformerException e)
              {System.out.println(e.getMessage());}
        
        }catch(javax.xml.parsers.ParserConfigurationException e)
           {System.out.println(e.getMessage());
        }catch(org.xml.sax.SAXException e)
           {System.out.println(e.getMessage());
        }catch(java.io.IOException e)
           {System.out.println(e.getMessage());}   
     } 
  }

public class IdenticalTransformation{
   public static void main(String[] args)
      {
      DOM t=new DOM();    
      t.identicalTransf("C://Data_local//xml
                                  //docs//Carte.xml");
      }
}    
Leonard Anghel
 
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