[Geoserver-devel] [jira] Created: (GEOS-3726) PostGIS features with type geometrycollection cause WFS shapefile export to fail

[Daniel Lipsitt (JIRA)]

PostGIS features with type geometrycollection cause WFS shapefile export to fail
--------------------------------------------------------------------------------

                 Key: GEOS-3726
                 URL: http://jira.codehaus.org/browse/GEOS-3726
             Project: GeoServer
          Issue Type: Bug
          Components: WFS
    Affects Versions: 1.7.5
         Environment: CentOS Linux 5.0; Sun Java 1.6.0; x86_64; gdal-1.4.2-4.el5
            Reporter: Daniel Lipsitt
            Assignee: Andrea Aime


I have a shapefile imported into a PostGIS DB with {{ogr2ogr}}. The layer 
renders in WMS, but WFS export using {{outputFormat=SHAPE-ZIP}} fails with the 
following error:

{code:xml}
<ows:Exception exceptionCode="NoApplicableCode">
  <ows:ExceptionText>
java.lang.RuntimeException: This should never happen, there&amp;apos;s
a bug in the SHAPE-ZIP output format. I got a geometry of type class
com.vividsolutions.jts.geom.GeometryCollection This should never
happen, there&amp;apos;s a bug in the SHAPE-ZIP output format. I got a
geometry of type class com.vividsolutions.jts.geom.GeometryCollection
  </ows:ExceptionText>
</ows:Exception>
{code}

This error is coming from {{wfs/response/ShapeZipOutputFormat.java}}

Here's what I see in Postgres:

{code:sql}
select geometrytype(wkb_geometry) as type, count(*) from mytable
group by type;

        type        | count 
--------------------+-------
 POLYGON            |   289
 MULTIPOLYGON       |     3
 GEOMETRYCOLLECTION |     1

select st_astext(wkb_geometry) from mytable 
where geometrytype(wkb_geometry) = 'GEOMETRYCOLLECTION';

        st_astext         
--------------------------
 GEOMETRYCOLLECTION EMPTY

{code}

So you can see that the table contains one empty {{geometrycollection}} row. 
This is how it was created by {{ogr2ogr}} with the {{-nlt GEOMETRY}} flag.

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