Re: [xml-dev] XML Designing Problems.

[Fredrik Lindgren <fredrik.lindgren@chello.se>]

Hi Rajesh,

I would suggest you to try out dom4j. http://www.dom4j.org/
It provides XPath support as well as a well designed java api on top of 
DOM.
This example of selecting nodes based on XPath is taken from the quick 
start guide: http://www.dom4j.org/guide.html

     public void bar(Document document) {
         List list = document.selectNodes( "//foo/bar" );

         Node node = document.selectSingleNode( "//foo/bar/author" );

         String name = node.valueOf( "@name" );
     }

Using your structure (changing the root element from XML to ROOT)
<ROOT>
     <XYZ> Value of xyz </XYZ>
     <Children1>
         <ABC> Value of Element1 </ABC>
         <XYZ> Value for this xyz </XYZ>
     </Children1>
</ROOT>

// selects all XYZ elements (like getElementsByTagName("XYZ"))
Node node = document.selectSingleNode( "//XYZ" );

// selects XYZ elements directly within Children1
Node node = document.selectSingleNode( "//Children1/XYZ" );

Good XPath reading:
http://www.zvon.org/xxl/XPathTutorial/General/examples.html
http://www.w3.org/TR/xpath

/Fredrik Lindgren


Rajesh AVRS wrote:

> Hi Mike,
> 
> Can you give me more inputs on XPath?  And what Xalan can do which Xerces
> can't?  Please enlighten me.
> 
> Rajesh
> ----- Original Message -----
> From: "Mike Champion" <mc@xegesis.org>
> To: "Rajesh AVRS" <rajesh.ram@wipro.com>
> Sent: Friday, February 08, 2002 6:14 PM
> Subject: Re: [xml-dev] XML Designing Problems.
> 
> 
> 
>>2/8/2002 4:42:18 AM, "Rajesh AVRS" <rajesh.ram@wipro.com> wrote:
>>
>>
>>>Now if I have this kind of design for the document the results will be
>>>unpredictable right?  I never know corresponding the which XYZ tag the
>>>
> value
> 
>>>has been returned.  Any suggestions on how I can modify my method so that
>>>the caller can say, get me the value of XYZ which is a child of the root
>>>element or something like that.
>>>
>>Use XPath.  I believe that it is in Xerces DOM Level 3 support, or you
>>
> could use Xalan.
> 
>>
>>
> 
> 
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