register a namespace in xPath filter
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I have realized a really stupid xPath filter in MatLab:
% Construct the DOM.
docNode = xmlread('C:\Users\MATLAB\test.gpx');
% get the xpath mechanism into the workspace
import javax.xml.xpath.*
factory = XPathFactory.newInstance;
xpath = factory.newXPath;
% compile and evaluate the XPath Expression
expression = xpath.compile('gpx/AddressBook/Entry/PhoneNumber');
phoneNumberNode = expression.evaluate(docNode, XPathConstants.NODE);
phoneNumber = phoneNumberNode.getTextContent
With this XML (specifically a .gpx file) it works:
<?xml version='1.0' encoding='ISO-8859-1' standalone='yes' ?>
<gpx version='1.1' creator='TTTracklog V.1.13'>
<Entry>
<Name>Friendly J. Mathworker</Name>
<PhoneNumber>(508) 647-7000</PhoneNumber>
<Address hasZip="no" type="work">3 Apple Hill Dr, Natick MA</Address>
</Entry>
</gpx>
but as soon add a namespace to this file I get in trouble. For example, this xml doesn't works:
<?xml version='1.0' encoding='ISO-8859-1' standalone='yes'?>
<gpx version='1.1' creator='TTTracklog V.1.13' xmlns='http://www.topografix.com/GPX/1/1' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd'>
<Entry>
<Name>Friendly J. Mathworker</Name>
<PhoneNumber>(508) 647-7000</PhoneNumber>
<Address hasZip="no" type="work">3 Apple Hill Dr, Natick MA</Address>
</Entry>
</gpx>
My filter broke up, with second XML file, saying that I'm attempting to reference field of non-structure array. How can I register the default namespace?
2 comentarios
Jarrod Rivituso
el 7 de Nov. de 2013
I'm not sure how do do this without really getting into the Java files. :)
There's a tool I put together which allows you to extract data via XPath with namespace support.
You may find it useful!
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