Bug in setAttribute???

[Gude Reshma <re...@yahoo.com>]

hi .

i am using DOM to create an XML file .I am using methods like setAttribute to set attribute of the created element. But sometmies i find that the attribute is not set properly. for example if i have an element named 'e' & i do e.setAttribute('i', "value"); sometimes i find that i ge tsomething like <e i="></e>. 

I am using XML serializer to convert the element i get into XML. So when i parse the XML i get an expcetion bcoz tis not well formed.

can anyone help??

 



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Re: Bug in setAttribute???

[Gude Reshma <re...@yahoo.com>]

No i'm not using threads. Here is my sample code:
import org.w3c.dom.*;
import java.io.*;
import org.apache.xerces.parsers.*;
import org.xml.sax.*;
import javax.xml.parsers.*;
import org.apache.xml.serialize.*;
 
public class Test1
{
 public static void main(String args[])
 {
  Test1 t1 = new Test1();
  String s = "<parent id='1'></parent>";
  Document doc = t1.parseString(s);
  Element parent_element = doc.getDocumentElement();
  Element child = doc.createElement("child");
  child.setAttribute("id","1");
  parent_element.appendChild(child);
  s = t1.getDocumentAsString(doc);
  //this is sometimes wrong,i.e i get s as <parent id='1'><child id="></child></parent>
  System.out.println(s);
  
 
 }
 
 
 public Document parseString(String str)
 {
  Document doc = null;
  try
  {
   byte[] byte_array_of_string = str.getBytes();
   InputStream istr = new ByteArrayInputStream(byte_array_of_string);
   InputSource is = new InputSource(istr);
  
   DOMParser dom_parser = new DOMParser();
   dom_parser.parse(is);
   doc = dom_parser.getDocument();
  }
  catch(Exception e)
  {
   System.out.println("Error in parseString :: "+e);
  }
  return(doc);
 }
 
 
 public String getDocumentAsString(Document doc) 
 {
  ByteArrayOutputStream str = new ByteArrayOutputStream();
  try
  {
   long l = System.currentTimeMillis();
   OutputFormat format = new OutputFormat("XML","UTF-8",true);
   
   XMLSerializer serializer = new XMLSerializer(str, format);
   serializer.serialize(doc.getDocumentElement());
   long l1 = System.currentTimeMillis();
   
  }
  catch(Exception e)
  {
   System.out.println("Exception in getDocumentAsString "+e);
  }
  String s = str.toString();
  return s;
  
 } 
}

 
 Elena Litani wrote:Gude Reshma wrote:
> i am using DOM to create an XML file .I am using methods like
> setAttribute to set attribute of the created element. But sometmies i
> find that the attribute is not set properly. for example if i have an
> element named 'e' & i do e.setAttribute('i', "value"); sometimes i
> find that i ge tsomething like 


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Re: Bug in setAttribute???

[Elena Litani <el...@ca.ibm.com>]

Gude Reshma wrote:
> i am using DOM to create an XML file .I am using methods like
> setAttribute to set attribute of the created element. But sometmies i
> find that the attribute is not set properly. for example if i have an
> element named 'e' & i do e.setAttribute('i', "value"); sometimes i
> find that i ge tsomething like <e i="></e>.

This is really weird -- do you use threads in your application?
If yes, you need to synchronize access the DOM tree, since our
implementation is not thread safe.

If not, please, provide a sample code that shows the bug.

Thanks!
-- 
Elena Litani / IBM Toronto

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