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Help required for filtering XML using DOM parser

  Asked By: Lloyd    Date: Oct 03    Category: Java    Views: 1081
  

I am really not sure if i
would sound stupid with the problem I am seeking help for. But still
optimistic about recieving an answer I am sending this mail.

I have this requirement of filtering out some sub-nodes from a XML
based on the values of attribute inside the sub-node. For eg

Input XML:
---------
<rootnode>
<mynode>
<myvalue>1</myvalue>
</mynode>
<mynode>
<myvalue>1</myvalue>
</mynode>
<mynode>
<myvalue>2</myvalue>
</mynode>
<mynode>
<myvalue>2</myvalue>
</mynode>
<mynode>
<myvalue>1</myvalue>
</mynode>
</rootnode>

Processing:
----------
Filter out all nodes which have myvalue=2

Output XML:
----------
<rootnode>
<mynode>
<myvalue>1</myvalue>
</mynode>
<mynode>
<myvalue>1</myvalue>
</mynode>
<mynode>
<myvalue>1</myvalue>
</mynode>
</rootnode>

Can anyone please suggest me the best way to do it ? I am a beginner
with DOM parsing. If you can please point me to available
documentation/ code snippents, that would be great.

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1 Answer Found

 
Answer #1    Answered By: Emily Brown     Answered On: Oct 03

Parse the XML file and get a reference to a Document
object. On the document object call the
getElementsByTagName(java.lang.String tagname) this
will return an NodeList. Iterate through this node
list and recreate a new DOM structure filtered values
and write the DOM structure back to the file system.
I can send you a sample code  if you tell me that
parser that you are using, is it Xerces or is it XML4J

 
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