Re: [Vtd-xml-users] XPath doubt

[Jimmy Z. <cra...@co...>]

It seems that  "ap.declareXPathNameSpace("cite", =
"www.opengeospatial.net/cite");" should
have been   "ap.declareXPathNameSpace("cite", =
"http://www.opengeospatial.net/cite");"


also ap.selectElementNS is not for XPath eval/selection, it is to =
emulate DOM's
noteIterator inteface.

Let me know if there is any question...
  ----- Original Message -----=20
  From: Fernando Gonzalez=20
  To: vtd...@li...=20
  Sent: Tuesday, March 27, 2007 1:55 AM
  Subject: [Vtd-xml-users] XPath doubt


  Hi again,

  I'm having some problems using XPath expressions...=20
  When I use the "/wfs:FeatureCollection/gml:featureMember" expression =
it works fine.=20
  But if I add one more element: =
"/wfs:FeatureCollection/gml:featureMember/cite:Streams" it matches =
nothing...=20
  The most surprising (to me) is that if I use this =
"/wfs:FeatureCollection/gml:featureMember/*" it matches the =
"cite:Streams" elements in the XML.

  Am I missing something??

  By the way, I don't know what's the point of the " =
AutoPilot.selectElementNS" and "AutoPilot.declareXPathNameSpace" methods =
so maybe the problem is there. Where can I find some documentation about =
them. I looked in the javadoc but it's not clear to me.

  Thanks in advance,

  This is the code and the file:

          AutoPilot ap =3D new AutoPilot(vn);
          ap.selectElementNS("www.opengeospatial.net/cite ", "*");
          ap.declareXPathNameSpace("cite", =
"www.opengeospatial.net/cite");
          ap.selectElementNS(" http://www.opengis.net/gml", "*");
          ap.declareXPathNameSpace("gml", "http://www.opengis.net/gml");
          ap.selectElementNS(" http://www.opengis.net/wfs", "*");
          ap.declareXPathNameSpace("wfs", "http://www.opengis.net/wfs"); =

          =
ap.selectXPath("/wfs:FeatureCollection/gml:featureMember/cite:Streams");
          int result =3D -1;
          while ((result =3D ap.evalXPath()) !=3D -1) {
              long l =3D vn.getElementFragment ();
              int tokenOffset =3D (int) (0x0000FFFF & l);
              int tokenLength =3D (int) ((0xFFFF0000 & l) >> 32);

              System.out.println(new String(b, tokenOffset, =
tokenLength));
          }


  I have the following XML file:


  <?xml version=3D"1.0" encoding=3D"UTF-8"?>
  <wfs:FeatureCollection xmlns:wfs=3D"http://www.opengis.net/wfs " =
xmlns:gml=3D"http://www.opengis.net/gml" =
xmlns:cite=3D"http://www.opengeospatial.net/cite" xmlns:xsi=3D" =
http://www.w3.org/2001/XMLSchema-instance" =
xsi:schemaLocation=3D"http://www.opengeospatial.net/cite =
http://www.refractions.net:8082/geoserver1.3.1/wfs/DescribeFeatureType?ty=
peName=3Dcite:Streams http://www.opengis.net/wfs =
http://www.refractions.net:8082/geoserver1.3.1/schemas/wfs/1.0.0/WFS-basi=
c.xsd">
    <gml:boundedBy>
      <gml:Box>
        <gml:coordinates decimal=3D"." cs=3D"," ts=3D" ">- =
0.0004,-0.0024 0.0036,0.0024</gml:coordinates>
      </gml:Box>
    </gml:boundedBy>
    <gml:featureMember>
      <cite:Streams fid=3D"Streams.1">
        <cite:the_geom>
          <gml:MultiLineString>
  ...





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