They way that I shows will be a bit nicer because the map is open and
if you add the layer before setting the filter a request will be made
to get the features which will have to be cancelled and a new request
made. My snippet ensures that the request is made only once.
Jesse
On 19-Dec-08, at 12:17 PM, Ugo Taddei wrote:
Hi,
this is easier than you think :-)
Forget the OracleDataStore and the Filter stuff in the following
loop. Just do this:
List resourceList = instantiate...
for( IService service : serviceFactory.createService( params ) ){
try {
CatalogPlugin.getDefault().getLocalCatalog().add( service );
for (IResolve nextElt : service.members(new
if (nextElt instanceof IGeoResource) {
resourceList.add((IGeoResource) nextElt);
}
}
}catch (IOException couldNotConnect ){
//log
}
}
//add to the map
ApplicationGIS.addLayersToMap(ApplicationGIS.getActiveMap(),
resourceList, 1, null, true);
//now get the layers and apply the filter with the blacboard snippet
// from the previous email
Here you just plugin the code Jesse just sent.
Jacques LESCOT wrote:
Maybe that my problem is different :
Using the following code snippet, the "coll" variable contains
indeed the only Feature with the given ID. The probem is that I do
not know how to either enforce this filter to be applied to my
IService or adapt teh Feature into an IGeoResource so that it could
be displayed on a Layer ?
OracleDataStore database =
service.resolve(OracleDataStore.class, new NullProgressMonitor());
FeatureSource<SimpleFeatureType, SimpleFeature>
featureSource = database.getFeatureSource("LOCATION_POINT"); //
Filter only the LOCATION_POINT table from my database
FilterFactory ff =
CommonFactoryFinder.getFilterFactory(GeoTools.getDefaultHints());
Filter franceFilter =
ff.id(Collections.singleton(ff.featureId("LOCATION_POINT.681")));
FeatureCollection<SimpleFeatureType,
SimpleFeature> coll = featureSource.getFeatures(franceFilter); //
Filter only the record with ID="681"
List<IGeoResource> resourceList = new
ArrayList<IGeoResource>();
for (IResolve nextElt : service.members(new
NullProgressMonitor())) { // service.members(...) returns me the
whole LOCATION_POINT table
if (nextElt instanceof IGeoResource) {
resourceList.add((IGeoResource) nextElt);
}
}
ApplicationGIS.addLayersToMap(ApplicationGIS.getActiveMap(),
resourceList, 1, null, true);
I added some comments in order to help you understand what's happen
with the above code.
Thus, I am here working with an OracleDataStore, and I am using
uDig trunk source code.
Regards,
Jacques
Ugo Taddei a écrit :
Jesse Eichar wrote:
On 19-Dec-08, at 11:32 AM, Jacques LESCOT wrote:
See my comments below,
Jesse Eichar a écrit :
Hi,
We need to rename the packages from internal to something less
frightening. When it comes to net.refractions.udig.project the
internal packages can be used but NOT the internal.impl
packages. The idea was to make people reluctant to use the
internal classes because most of the things should be done with
Commands not direct. Commands allow roll-back. Problem was
that for setting up maps and so on it is annoying to do it
through commands.
Yes, I recognized here EMF behavior :-)
As for filtering features I would recommend trying to make use
of the view work.
In my case, I need to perform this programmatically.
It has a couple bugs but in general works. The way to do it
is to put a Filter on the styleblackboard with the key:
net
.refractions
.udig
.project
.ProjectBlackboardConstants
.ProjectBlackboardConstants.LAYER__DATA_QUERY
You will probably think I am fastidious but I would prefer a
solution where filtering is done at a upper level : I mean
instead of retrieving all the datas from the database and then
filtering them in the map editor, I would like to filter things
when requesting datas from the database. As I said before, the
database may contains lots of records and thus it would be more
judicious to limit records that are sent back by the server. I
am pretty sure solution is near (from what I read from http://docs.codehaus.org/display/GEOTDOC/02+Filter)
but I would really need a little more help. :-)
Huh. I thought it created it did something so that only those
features that matched the Filter were retrieved. I haven't
personally tested this but that was my understanding. Have you
verified that all features are retrieved from the postgis? You
are using Postgis right?
I think you're correct here, Jesse. The filtering is done at data
store level. Though I haven't written the code in our app, the
colleague who did told me it was so. (At least with our
shapefiles. And that was udig 1.1, but I don't think that should
matter.)
Cheers,
Ugo
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User-friendly Desktop Internet GIS (uDig)
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--
Ugo Taddei
Fraunhofer Institut Intelligente Analyse- und Informationssysteme
(FhG IAIS)
http://www.iais.fraunhofer.de
Department Knowledge Discovery - IAIS.KD -
Working Group Spatial Decision Support
http://www.iais.fraunhofer.de/kd.html
phone (+49)2241-14-2184 fax (+49)2241-14-2072
Schloss Birlinghoven, D-53754 Sankt Augustin, Germany
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