Wow ! That's going to be useful. How does it handle two geom fields ?
Etienne
On Wed, Mar 30, 2011 at 12:19 AM, Larry Reeder <lnree...@gmail.com> wrote:
> I've got a patch that allows direct selection of a PostGis geometry
> column without needing to use ST_AsBinary() to get past that "unknown
> WKB type 48" error. The patch also supports continued use of
> ST_AsBinary. Can someone commit the patch for me or give me write
> access to the repository?
>
> Thanks............. lreeder
>
> Patch below:
>
> Index: datastore/postgis/PostgisValueConverterFactory.java
> ===================================================================
> --- datastore/postgis/PostgisValueConverterFactory.java (revision 2241)
> +++ datastore/postgis/PostgisValueConverterFactory.java (working copy)
> @@ -69,8 +69,36 @@
> throws IOException, SQLException, ParseException
> {
> byte[] bytes = rs.getBytes(columnIndex);
> - if (bytes == null) return wktReader.read("GEOMETRYCOLLECTION
> EMPTY");
> - else return wkbReader.read(bytes);
> +
> + //so rs.getBytes will be one of two things:
> + //1. The actual bytes of the WKB if someone did ST_AsBinary
> + //2. The bytes of hex representation of the WKB.
> +
> + //in the case of #1, according to the WKB spec, the byte value
> + //can only be 0 or 1.
> + //in the case of #2, it's a hex string, so values range from ascii
> 0-F
> + //use this logic to determine how to process the bytes.
> +
> + Geometry geometry = null;
> + if(bytes == null || bytes.length <= 0)
> + {
> + geometry = wktReader.read("GEOMETRYCOLLECTION EMPTY");
> + }
> + else
> + {
> + //assume it's the actual bytes (from ST_AsBinary)
> + byte[] realWkbBytes = bytes;
> + if(bytes[0] >= '0')
> + {
> + //ok, it's hex, convert hex string to actual bytes
> + String hexString = new String(bytes);
> + realWkbBytes = WKBReader.hexToBytes(hexString);
> + }
> +
> + geometry = wkbReader.read(realWkbBytes);
> + }
> +
> + return geometry;
> }
> }
> }
>
>
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