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How to Retrieve DOM

achayya matta
Ranch Hand

Joined: Oct 27, 2005
Posts: 111
hello ranchers,
Can you people help me ?
my problem is..........

i am going to do some online examination project.I want to implement AJAX model for my project.
i have created one servlet which fetches " Questions and answers" from Database and makes one XML document in the memory.
I want to retrieve this XML document in my java script code.


Can you people suggest me how to retrieve the DOM in my java Script code???


....................................Following is the code which generates XML document..........................

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.DOMWriter;



public class DocGen
{

private org.dom4j.Document doc;
Element root;
Element child;
Element Ichild;

public org.w3c.dom.Document generateDoc() throws Exception{
doc = DocumentHelper.createDocument();

root=doc.addElement("Questions");
child= root.addElement("Question").addAttribute("id","1").addAttribute("text","Which of the following are valid java keywords?");
Ichild= child.addElement("Option").addText("while");
Ichild= child.addElement("Option").addText("if");
Ichild= child.addElement("Option").addText("goto");
Ichild= child.addElement("Option").addText("friend");

child= root.addElement("Question").addAttribute("id","2").addAttribute("text","which of the following are valid java access specifiers?");
Ichild= child.addElement("Option").addText("public");
Ichild= child.addElement("Option").addText("private");
Ichild= child.addElement("Option").addText("default");
Ichild= child.addElement("Option").addText("none");

DOMWriter writer = new DOMWriter(); /* this line is used to create W3C DOM object out of DOM4J DOM object */
return writer.write(this.doc);

}


}



..............................Following is the code which makes W3c DOM........................................................
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

import com.valueshore.xml.DocGen;

import org.dom4j.Document;

/**
*
* @author GSI
* @version
*/
public class EvaluationServlet extends HttpServlet {


protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException,Exception {

DocGen dg=new DocGen();
org.w3c.dom.Document doc=dg.generateDoc();
response.setContentType("text/xml");
PrintWriter out = response.getWriter();
out.close();
}


}
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 61198
    
  66

You'll need to serialize the DOM to XML text and send it as the response of the AJAX request.


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Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 61198
    
  66

P.S. Please use UBB code tags when posting more than one line of code.
[ August 07, 2006: Message edited by: Bear Bibeault ]
 
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subject: How to Retrieve DOM