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Re: [Vtd-xml-users] XPath doubt
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From: Fernando G. <fer...@gm...> - 2007-03-29 13:32:06
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Yes Jimmy, the missing "http://" was the fault. Well, at least, now I
understand better the behavior of XPath in VTD...
greetings,
Fernando
On 3/28/07, Jimmy Zhang <cra...@co...> wrote:
>
> No problem, it gave me a chance to get to the code to reassure myself
> that it actually works :-)..
> Feel free if there is any question..
>
> ----- Original Message -----
> *From:* Fernando Gonzalez <fer...@gm...>
> *To:* vtd...@li...
> *Sent:* Wednesday, March 28, 2007 1:47 AM
> *Subject:* Re: [Vtd-xml-users] XPath doubt
>
> Thanks a lot for your help Jimmy. I cannot test right now the proposed
> solution, but I will do it this week. If it's just that, I'm sorry to have
> wasted your time...
>
> Fernando
>
> On 3/28/07, Jimmy Zhang <cra...@co...> wrote:
> >
> > 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 -----
> > *From:* Fernando Gonzalez <fer...@gm...>
> > *To:* vtd...@li...
> > *Sent:* Tuesday, March 27, 2007 1:55 AM
> > *Subject:* [Vtd-xml-users] XPath doubt
> >
> > Hi again,
> >
> > I'm having some problems using XPath expressions...
> > When I use the "/wfs:FeatureCollection/gml:featureMember" expression it
> > works fine.
> > But if I add one more element:
> > "/wfs:FeatureCollection/gml:featureMember/cite:Streams" it matches
> > nothing...
> > 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 = 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 = -1;
> > while ((result = ap.evalXPath()) != -1) {
> > long l = vn.getElementFragment ();
> > int tokenOffset = (int) (0x0000FFFF & l);
> > int tokenLength = (int) ((0xFFFF0000 & l) >> 32);
> >
> > System.out.println(new String(b, tokenOffset, tokenLength));
> > }
> >
> >
> > I have the following XML file:
> >
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <wfs:FeatureCollection xmlns:wfs="http://www.opengis.net/wfs "
> > xmlns:gml="http://www.opengis.net/gml" xmlns:cite="
> > http://www.opengeospatial.net/cite" xmlns:xsi="
> > http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
> > http://www.opengeospatial.net/cite http://www.refractions.net:8082/geoserver1.3.1/wfs/DescribeFeatureType?typeName=cite:Streams
> > http://www.opengis.net/wfs
> > http://www.refractions.net:8082/geoserver1.3.1/schemas/wfs/1.0.0/WFS-basic.xsd
> > ">
> > <gml:boundedBy>
> > <gml:Box>
> > <gml:coordinates decimal="." cs="," ts=" ">- 0.0004,-0.0024 0.0036
> > ,0.0024</gml:coordinates>
> > </gml:Box>
> > </gml:boundedBy>
> > <gml:featureMember>
> > <cite:Streams fid="Streams.1">
> > <cite:the_geom>
> > <gml:MultiLineString>
> > ...
> >
> >
> > ------------------------------
> >
> >
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