That is actually what the shapefile format does; it only supports "multi".
Jody
On 25/06/2010, at 7:41 AM, Lopes, Jose (AAFC-AAC) wrote:
> Hi
>
> I made a geojson2shape and shape2geojson java class translators…
> They work for single Points, but for LineString and Polygons, the shape file
> is created and I can see the geometries in ArcMap, but when I translate the
> file back to geojson it seems that the class
>
> org.geotools.data.shapefile.indexed.IndexedShapefileDataStore
>
> reads the shp as Polygon but the geometryClass and geometryType created are
> com.vividsolutions.jts.geom.MultiPolygon,
>
> although when I create the SimpleFeatureType I create it as a
> com.vividsolutions.jts.geom.Polygon.class
>
> The shape file has 4 geometries, all Polygons but no MultiPolygons…
>
> I read the shape file and identify the Geometry type with this code:
>
> FeatureSource featureSource =
> store.getFeatureSource();
> FeatureCollection featColl =
> featureSource.getFeatures();
> FeatureType featType = featColl.getSchema(); //only
> used to define the CRS
> FeatureIterator featIt = featColl.features();
> while (featIt.hasNext()){
> feature = featIt.next();
> Collection collValues =
> feature.getValue();
> Iterator collIt =
> collValues.iterator();
> while (collIt.hasNext()){
> Object obj0 =
> collIt.next();
> Attribute
> attribute = (Attribute)obj0;
> if
> (attribute.getName().toString().trim().equals("the_geom")){
> if
> (attribute.getValue() instanceof XX…identifyGeometryTypeHere…XXX){
>
> handleMyGeometryTypeXXX(attribute.getValue())
> }
> }
> }
>
> }
>
>
> The attribute “the_geom” should have a value of Polygon but the value is a
> MultiPolygon in this case…
> It seems that ShapeFileDataStore wraps each Feature in a MultiPolygon and
> adds the Polygon to it.
> So, instead of reading 4 features, each one a Polygon, it reads 4
> MultiPolygons, each one with a Polygon inside.
> LineString has the same behaviour…
>
> Can anybody confirm my version or tell me that the problem is with my code
> instead?
>
>
> Thanks,
> Jose Lopes
>
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