[OpenLayers-Dev] Multiple typenames in getFeature POST request

[Alexandre Dube]

Hi devs,

  I use OpenLayers from http://svn.openlayers.org/sandbox/topp/wfs.

  I needed to have multiple typenames on the same getFeature post 
request with BBOX strategy and Cluster Stategy.  Problem is, OL doesn't 
construct the GML correctly.  I don't know if this has been fixed yet, 
but I managed to make it work.

  Here's the GML that OL produced ( which only returned one type of 
features, thereby wrong ) :




<wfs:GetFeature xmlns:wfs="http://www.opengis.net/wfs" service="WFS"
version="1.0.0" xsi:schemaLocation="http://www.opengis.net/wfs 
http://schemas.opengis.net/wfs/1.0.0/WFS-transaction.xsd 
http://mapserver.gis.umn.edu/mapserver 
http://dev4.mapgears.com/cgi-bin/mapserv?map=/home/mapgears/proj/test/map/test.map&amp;service=WFS&amp;version=1.0.0&amp;request=DescribeFeatureType&amp;TypeName=Pylone,Barrage,Alluminerie" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <wfs:Query typeName="feature:Alluminerie,Pylone,Barrage" 
xmlns:feature="http://mapserver.gis.umn.edu/mapserver">
    <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
      <ogc:BBOX>
        <ogc:PropertyName>msGeometry</ogc:PropertyName>
        <gml:Box xmlns:gml="http://www.opengis.net/gml" 
srsName="EPSG:32187">
          <gml:coordinates decimal="." cs="," ts=" 
">216095.28050192632,5380236.473595727 
226184.71949807368,5385323.526404273</gml:coordinates>
        </gml:Box>
      </ogc:BBOX>
    </ogc:Filter>
  </wfs:Query>
</wfs:GetFeature>





  And here's a request that returns all features from the 3 types :

<wfs:GetFeature xmlns:wfs="http://www.opengis.net/wfs" service="WFS"
version="1.0.0" xsi:schemaLocation="http://www.opengis.net/wfs 
http://schemas.opengis.net/wfs/1.0.0/WFS-transaction.xsd 
http://mapserver.gis.umn.edu/mapserver 
http://dev4.mapgears.com/cgi-bin/mapserv?map=/home/mapgears/proj/test/map/test.map&amp;service=WFS&amp;version=1.0.0&amp;request=DescribeFeatureType&amp;TypeName=Pylone,Barrage,Alluminerie" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <wfs:Query typeName="feature:Barrage" 
xmlns:feature="http://mapserver.gis.umn.edu/mapserver">
    <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
      <ogc:BBOX>
        <ogc:PropertyName>msGeometry</ogc:PropertyName>
        <gml:Box xmlns:gml="http://www.opengis.net/gml" 
srsName="EPSG:32187">
          <gml:coordinates decimal="." cs="," ts=" 
">216063.53051907133,5380218.834716363 
226216.46948092867,5385341.165283637</gml:coordinates>
        </gml:Box>
      </ogc:BBOX>
    </ogc:Filter>
  </wfs:Query>
  <wfs:Query typeName="feature:Alluminerie" 
xmlns:feature="http://mapserver.gis.umn.edu/mapserver">
    <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
      <ogc:BBOX>
        <ogc:PropertyName>msGeometry</ogc:PropertyName>
        <gml:Box xmlns:gml="http://www.opengis.net/gml" 
srsName="EPSG:32187">
          <gml:coordinates decimal="." cs="," ts=" 
">216063.53051907133,5380218.834716363 
226216.46948092867,5385341.165283637</gml:coordinates>
        </gml:Box>
      </ogc:BBOX>
    </ogc:Filter>
  </wfs:Query>
  <wfs:Query typeName="feature:Pylone" 
xmlns:feature="http://mapserver.gis.umn.edu/mapserver">
    <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
      <ogc:BBOX>
        <ogc:PropertyName>msGeometry</ogc:PropertyName>
        <gml:Box xmlns:gml="http://www.opengis.net/gml" 
srsName="EPSG:32187">
          <gml:coordinates decimal="." cs="," ts=" 
">216063.53051907133,5380218.834716363 
226216.46948092867,5385341.165283637</gml:coordinates>
        </gml:Box>
      </ogc:BBOX>
    </ogc:Filter>
  </wfs:Query>
</wfs:GetFeature>






  Instead of one query containing typeName="1,2,3", there should be 3 
query with typeName="x" in each.  That worked for me.  Here's what I had 
to change in ./lib/OpenLayers/Format/WFST/v1.js ( near Line 206 ) :

//Before :
his.writeNode("Query", options, node);

//After :
var aszFeatureTypes = options.featureType.split(',');
for (i=0; i<aszFeatureTypes.length; i++){
    options.featureType = aszFeatureTypes[i];
    this.writeNode("Query", options, node);
}

  I'm really not sure if that's the best solution for this, though...  
Any comments about this ?
 

-- 
Alexandre Dubé
Mapgears
www.mapgears.com