Re: Problem with reusing a featuretype (was: Re: [udig-devel] two questi

[Jesse Eichar <jeichar@xxxxxxxxxxxxxxx>]

Hi Tony,

I think that the problem is that the two feature types have the same  
name so the second can't be created.

Try something like:

FeatureTypeBuilder builder=new FeatureTypeBuilder();
builder.importType( oldType );
builder.setName( "newname" );
builder.getFeatureType();

Jesse


On Mar 23, 2007, at 9:08 AM, tony.roth@xxxxxx wrote:

> > Von: Jesse Eichar <jeichar@xxxxxxxxxxxxxxx>
> > On 20-Feb-07, at 4:38 AM, tony.roth@xxxxxx wrote:
> > > Hi list,
> > > in our project we are using jira plugins in our eclipse rcp
> > > application. It is used for the visualization of different  
> > > facilities
> > > on a map. The map is delivered by a wms server, the facilities are
> stored
> > >  in a database (mysql). To show these facilities a temporary  
> > > shape file
> > > is created. It was a funny thing writing mixed up big and little  
> > > endian
> > >  variables with java but finally it works :-) (yes, I suppose  
> > > somewhere
> > >  an api / lib exists but.. where?)
> > > i) Is this the canonic way? Or is it somehow possible to create an
> > >  in-memory layer instead of writing a shape file?
> > There are code snippets for just this sort of thing at:
> http://svn.geotools.org/udig/branches/1.1.x/udig/tutorials/ 
> net.refractions
> > .udig.code.examples/src/net/refractions/udig/code/examples/
>
> I have a problem with reusing a generated featuretype:
>
> At first I create the featuretype (this is done exactly once):
>
> FeatureTypeBuilder featureBuilder =
> FeatureTypeBuilder.newInstance(myFeatureTypeName);
> featureBuilder.addType(AttributeTypeFactory.newAttributeType 
> ("geometry",
> Point.class,true, Integer.MAX_VALUE, null,  
> DefaultGeographicCRS.WGS84));
> featureBuilder.addType(AttributeTypeFactory.newAttributeType("foo",
> String.class, true, Integer.MAX_VALUE));
> featureBuilder.addType(AttributeTypeFactory.newAttributeType("bar",
> String.class, true, Integer.MAX_VALUE));
> FeatureType featureType = featureBuilder.getFeatureType();
>
>
> then I create the ressource:
>
> resource =
> CatalogPlugin.getDefault().getLocalCatalog().createTemporaryResource 
> (featureType);
>
>
> I itereate through a list of values and add features to the ressource:
>
> GeometryFactory fac = new GeometryFactory();
> FeatureStore fs = resource.resolve(FeatureStore.class, null);
>
> for (ListItem item : list) {
>  Coordinate pointCoordinate = new Coordinate(item.get...);
>  Point point = fac.createPoint(pointCoordinate);
>  String foo = item.get...
>  String bar = item.get...
>  Feature feature = featureType.create(new Object[]{point,foo,bar});
>  fs.addFeatures(DataUtilities.collection(new Feature[]{feature}));
> }
>
> finally I create the layer
> LayerFactory layerFactory = map.getLayerFactory();
> Layer layer = layerFactory.createLayer(resource);
> ...
>
> This works and the layer is shown in the map
>
> Later the application tries to create a new layer based on a  
> resource of
> this featuretype. It starts with
> resource =
> CatalogPlugin.getDefault().getLocalCatalog().createTemporaryResource 
> (featureType);
>
> (like above) but I get an exception:
>
> java.lang.RuntimeException
>  at
>   
> net.refractions.udig.catalog.internal.CatalogImpl.createTemporaryResou 
> rce(CatalogImpl.java:749)
>
>  at ... the row with [resource = CatalogPlugin....] (see above)
>
> Caused by: java.lang.UnsupportedOperationException: Schema  
> modification not
>  supported
>  at
>  org.geotools.data.AbstractDataStore.updateSchema 
> (AbstractDataStore.java:228)
>
>  at
>   
> net.refractions.udig.catalog.memory.internal.TemporaryResourceFactory. 
> createResource(TemporaryResourceFactory.java:48)
>
>  at
>   
> net.refractions.udig.catalog.internal.CatalogImpl.createTemporaryResou 
> rce(CatalogImpl.java:743)
>
>  ... 54 more
>
> What am I doing wrong? I'm not modifyfing the featureType any more,  
> I just
> want to create a new (a second) ressource based on the featureType.  
> Isn't
> it possible?
> In
> net.refractions.udig.catalog.memory.internal.TemporaryResourceFactory. 
> createResource
>  udig wants to update the featureType but it seems to be not allowed.
>
> thanks for any help,
> tony roth
>
> ps At the moment we are using UDIG 1.1 RC8 in our project.
>
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