Java XMl parsing problems

Question

i have an xml sturcture as shown below:
<cnv:conversion xmlns:cnv="urn:ssis-conv" xmlns:xsql="urn:oracle-xsql">
<cnv:roottag support="yes" destag="xfw:script">
<cnv:addattr name="debug" value="no" />
<cnv:addattr name="xmlns:xfw" value="urn:scb-xfw-v2" />
</cnv:roottag>
<xsql:query support="yes" destag="xfw:genxml">
<connection support="no" />
<row-element support="yes" destag="row-name" />
<rowset-element support="yes" destag="rowset-name" />
<id-attribute support="no" />
<tag-case support="no" />
<null-indicator support="no" />
<cnv:addattr name="debug" value="yes" />
<cnv:addattr name="Attribute1" value="Value1" />
</xsql:query>
<xsql:no-rows-query support="no" child="no" />
<responsedata support="no" child="yes" />
<responsedata2 support="no" child="yes" />
<page destag="page1" support="yes">
<connection support="no" /> <debug destag="MyDebug" />
<cnv:addattr name="tt" value="t1" />
</page>
<xsql:set-page-param support="yes" destag="setpageparam">
<name destag="myname" />
</xsql:set-page-param>
<xsql:set-page-param-local support="yes" destag="Myset-page-param-local">
<name destag="mylocalname" />
</xsql:set-page-param-local>
</cnv:conversion>
I want this xml to be validated by the dom parser which i had done and its showing it as valid XML.
If there are any repeating tags like:
<cnv:conversion xmlns:cnv="urn:ssis-conv" xmlns:xsql="urn:oracle-xsql">
<cnv:conversion xmlns:cnv="urn:ssis-conv" xmlns:xsql="urn:oracle-xsql">
<cnv:roottag support="yes" destag="xfw:script">
<cnv:addattr name="debug" value="no" />
<cnv:addattr name="xmlns:xfw" value="urn:scb-xfw-v2" />
</cnv:roottag>
<xsql:query support="yes" destag="xfw:genxml">
<connection support="no" />
<row-element support="yes" destag="row-name" />
<rowset-element support="yes" destag="rowset-name" />
<id-attribute support="no" />
<tag-case support="no" />
<null-indicator support="no" />
<cnv:addattr name="debug" value="yes" />
<cnv:addattr name="Attribute1" value="Value1" />
</xsql:query>
<xsql:no-rows-query support="no" child="no" />
<responsedata support="no" child="yes" />
<responsedata2 support="no" child="yes" />
<page destag="page1" support="yes">
<connection support="no" /> <debug destag="MyDebug" />
<cnv:addattr name="tt" value="t1" />
</page>
<xsql:set-page-param support="yes" destag="setpageparam">
<name destag="myname" />
</xsql:set-page-param>
<xsql:set-page-param-local support="yes" destag="Myset-page-param-local">
<name destag="mylocalname" />
</xsql:set-page-param-local>
</cnv:conversion>
</cnv:conversion>
or like this....................
<cnv:conversion xmlns:cnv="urn:ssis-conv" xmlns:xsql="urn:oracle-xsql">
<cnv:roottag support="yes" destag="xfw:script">
<cnv:addattr name="debug" value="no" />
<cnv:addattr name="xmlns:xfw" value="urn:scb-xfw-v2" />
</cnv:roottag>
<cnv:roottag support="yes" destag="xfw:script">
<cnv:addattr name="debug" value="no" />
<cnv:addattr name="xmlns:xfw" value="urn:scb-xfw-v2" />
</cnv:roottag>
<xsql:query support="yes" destag="xfw:genxml">
<connection support="no" />
<row-element support="yes" destag="row-name" />
<rowset-element support="yes" destag="rowset-name" />
<id-attribute support="no" />
<tag-case support="no" />
<null-indicator support="no" />
<cnv:addattr name="debug" value="yes" />
<cnv:addattr name="Attribute1" value="Value1" />
</xsql:query>
<xsql:no-rows-query support="no" child="no" />
<responsedata support="no" child="yes" />
<responsedata2 support="no" child="yes" />
<page destag="page1" support="yes">
<connection support="no" /> <debug destag="MyDebug" />
<cnv:addattr name="tt" value="t1" />
</page>
<xsql:set-page-param support="yes" destag="setpageparam">
<name destag="myname" />
</xsql:set-page-param>
<xsql:set-page-param-local support="yes" destag="Myset-page-param-local">
<name destag="mylocalname" />
</xsql:set-page-param-local>
</cnv:conversion>
My java code is shown below :
import java.io.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.*;
public class sample2
public void processXML(String path)
File docFile=new File(path);
Document doc=null;
try
DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance(); DocumentBuilder db=dbf.newDocumentBuilder();
doc=db.parse(docFile);
catch(IOException ioe)
System.out.println("cant find file");
catch(Exception e)
System.out.println("Error has occured");
Element root=doc.getDocumentElement();
NodeList children=root.getChildNodes();
StringBuffer sbuf=new StringBuffer();
for(Node child=root.getFirstChild(); child!=null; child=child.getNextSibling())
if(child.getNodeType()==child.TEXT_NODE) sbuf.append(child.getNodeValue()) ;
else if(child.getNodeType()==child.ELEMENT_NODE) if(child.getChildNodes()!=null)
getnodes(child, sbuf);
public void getnodes(Node Child, StringBuffer sbf)
NodeList children=Child.getChildNodes();
if(children.getLength() > 0)
System.out.println(children.getLength() + Child.getNodeName());
for(Node child=Child.getFirstChild(); child!=null;child=child.getNextSibling())
if(child.getNodeType()==child.TEXT_NODE) sbf.append((child.getNodeValue()).trim());
else if(child.getNodeType()==child.ELEMENT_NODE)
if(child.getChildNodes()!=null)
getnodes(child, sbf); sbf.append(";");
public static void main(String[] args)
testxml txml=new testxml();
txml.processXML("E:\\Naresh\\conversion_fxsql.xml");
can any body tell me how to validate the repeating tags (as i dont have dtd for this xml )with the given code.... if any one of the tags are repeating it should raise an exception thats its not a valid xml
Thanks in advance
Regards
Bunny

Answer 1

I suggest you create a DTD or a XSD file to validate your existing XML document, because it's easier that i looks, and will help in future changes.
If you want to do it in Java code, you can always store each line of the XML file in some form (like a class) in a List, and the each time you read a line, you compare with everything on the list.
But don't go that way, make a XSD file