XML Parser : Select first node from DOM corresponding to xpath

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XML Parser : Select first node from DOM corresponding to xpath

XML Parser : Select first node from DOM corresponding to xpath

2004-04-27 - By Subrata SEN

Back

Reply: 1 2 3 4

Hi All,

I am new to XML Parsing. I am using xerces ( DOM ) parser and using
following function to get the nodelist:

public NodeList getXpathNodeList(String p_node_path) {

try {

return (org.apache.xpath.XPathAPI.selectNodeList(xmldoc, p_node_path));

} catch (TransformerException e) {

e.printStackTrace();

return null;

}

}

selectNodeList() is taking 90% of transactions time.

Packages

Method Name

Calls

Cumulative Time

Method Time

org.apache.xpath

XPathAPI.selectNodeList

1133

13954

13954

com.iflex.fcr.infra.xml

FCRJApacheXMLParser.getXpathNodeList

1129

13854

9

Question:

1. Is there any way (API available / workaround) we can stop searching
the next node after it gets first occurrence?

2. Is it logical for 1133 call XPathAPI.selectNodeList is taking 13954
ms (DOM size is less than 6kb)?

Thanks & Regards

Subrata SEN

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<body lang=EN-US link=blue vlink=purple>

<div class=Section1>

Hi All, <o:p></o:p>

I am new to XML Parsing. I am using xerces
( DOM ) parser and using  following function to get the nodelist: <o:p></o
:p>

<o:p> </o:p>

public NodeList getXpathNodeList(String
p_node_path) {<o:p></o:p>

      try {<o:p><
/o:p>

return (org.apache.xpath.XPathAPI
.selectNodeList(xmldoc,
p_node_path));<o:p></o:p>

      } catch
(TransformerException e) {<o:p></o:p>

       
             
    e.printStackTrace();<o:p></o:p>

       
             
    return
null;<o:p></o:p>

      }<o:p></o:p
>

<o:p> </o:p>

}<o:p></o:p>

<o:p> </o:p>

selectNodeList() is taking 90% of
transactions time. <o:p></o:p>

<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=881
style='width:660.7pt;margin-left:5.15pt;border-collapse:collapse'>
<tr height=63 style='height:47.25pt'>
<td width=199 nowrap height=63 valign=bottom bgcolor=silver style='width:
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5.4pt;
height:47.25pt'>
Packages<o:p><
/o:p>
</td>
<td width=458 nowrap height=63 valign=bottom bgcolor=silver style='width:
343.2pt;border:solid windowtext 1.0pt;border-left:none;background:silver;
padding:0in 5.4pt 0in 5.4pt;height:47.25pt'>
Method Name<o
:p></o:p>
</td>
<td width=56 nowrap height=63 valign=bottom bgcolor=silver style='width:42
.0pt;
border:solid windowtext 1.0pt;border-left:none;background:silver;padding:
0in 5.4pt 0in 5.4pt;height:47.25pt'>
Calls<o:p></o
:p>
</td>
<td width=98 height=63 valign=bottom bgcolor=silver style='width:73.8pt;
border:solid windowtext 1.0pt;border-left:none;background:silver;padding:
0in 5.4pt 0in 5.4pt;height:47.25pt'>
Cumulative
Time<o:p></o:p>
</td>
<td width=70 height=63 valign=bottom bgcolor=silver style='width:52.7pt;
border:solid windowtext 1.0pt;border-left:none;background:silver;padding:
0in 5.4pt 0in 5.4pt;height:47.25pt'>
Method Time<o
:p></o:p>
</td>
</tr>
<tr height=17 style='height:12.75pt'>
<td width=199 nowrap height=17 valign=bottom style='width:149.0pt;border:
solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;
height:12.75pt'>
org
.apache.xpath<o:p></o:p>
</td>
<td width=458 nowrap height=17 valign=bottom style='width:343.2pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt'>
XPathAPI.selectNodeList<o:p></o:p>
</td>
<td width=56 nowrap height=17 valign=bottom style='width:42.0pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
1133<o:p></o:p>
</td>
<td width=98 nowrap height=17 valign=bottom style='width:73.8pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
13954<o:p></o:p>
</td>
<td width=70 nowrap height=17 valign=bottom style='width:52.7pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
13954<o:p></o:p>
</td>
</tr>
<tr height=17 style='height:12.75pt'>
<td width=199 nowrap height=17 valign=bottom style='width:149.0pt;border:
solid windowtext 1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt;
height:12.75pt'>
com
.iflex.fcr.infra.xml<o:p></o:p>
</td>
<td width=458 nowrap height=17 valign=bottom style='width:343.2pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt'>
FCRJApacheXMLParser.getXpathNodeList<o:p></o:p>
</td>
<td width=56 nowrap height=17 valign=bottom style='width:42.0pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
1129<o:p></o:p>
</td>
<td width=98 nowrap height=17 valign=bottom style='width:73.8pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
13854<o:p></o:p>
</td>
<td width=70 nowrap height=17 valign=bottom style='width:52.7pt;border-top:
none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid
windowtext 1.0pt;
padding:0in 5.4pt 0in 5.4pt;height:12.75pt' x:num>
9<o:p></o:p>
</td>
</tr>
</table>

<o:p> </o:p>

<o:p> </o:p>

Question: <o:p></o:p>

<o:p> </o:p>

1. Is there any
way (API available / workaround) we can stop searching the next node after it
gets first occurrence?<o:p></o:p>

<o:p> </o:p
>

2. Is it logical
for 1133 call XPathAPI.selectNodeList is taking
13954 ms (DOM size is less than 6kb)?<o:p><
/o:p>

<o:p> </o:p>

Thanks & Regards<o:p></o:p>

<o:p> </o:p>

Subrata SEN <o:p></o:p>

<o:p> </o:p>

</div>

DISCLAIMER: This message contains privileged and confidential
information and is intended only for the individual named.If you are not the
intended recipient you should not disseminate,distribute,store,print, copy or
deliver this message.Please notify the sender immediately by e-mail if you have
received this e-mail by mistake and delete this e-mail from your system.E-mail
transmission cannot be guaranteed to be secure or error-free as information
could be intercepted,corrupted,lost,destroyed,arrive late or incomplete or
contain viruses.The sender therefore does not accept liability for any errors
or omissions in the contents of this message which arise as a result of e-mail
transmission. If verification is required please request a hard-copy version. <
/body>

</html>
====================================================================
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