Hi Jukka,
I just improved empty geometry handling in OJ shapefile driver.
Hope it will solve your problem. I had to do many modifications in the
code. I made extensive tests to make sure the code is as robust as
before, but I would be pleased if you could complete with your own tests.
Michaël
Le 07/10/2010 12:31, Rahkonen Jukka a écrit :
Hi,
JUMP DB Query plugin http://jumpdbqplugin.sourceforge.net/ used to
create a little polygon as a fake geometry for all the lines which
the SQL query was returning without a geometry. Now the new versions
of the plugin, starting from version 0.7.2. are creating an empty
geometry as "GEOMETRYCOLLECTION EMPTY".
This works fine as long as I am working with OpenJUMP and also saving
into JUMP jml format goes OK. But saving into shapefiles gives
problems and I have not discovered how I could keep the important
attribute data that I have also for the features without geometry.
If there are no other geometries on the layer, the OJ message while
doing shapefile save is
java.lang.Exception: Could not determine shapefile type - data is
either all GeometryCollections or empty
at
com.vividsolutions.jump.io.ShapefileWriter.makeSHAPEGeometryCollection(ShapefileWriter.java:728)
at
com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:295)
at
com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.executeUpdate(ReaderWriterFileDataSource.java:72)
at
com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn.run(AbstractSaveDatasetAsPlugIn.java:33)
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper.run(TaskMonitorManager.java:151)
at java.lang.Thread.run(Unknown Source)
If there are also real geometries then the message is
om.vividsolutions.jump.io.IllegalParametersException: mixed geometry
types found, please separate Polygons from Lines and Points when
saving to *.shp
at
com.vividsolutions.jump.io.ShapefileWriter.checkIfGeomsAreMixed(ShapefileWriter.java:639)
at
com.vividsolutions.jump.io.ShapefileWriter.write(ShapefileWriter.java:253)
at
com.vividsolutions.jump.io.datasource.ReaderWriterFileDataSource$1.executeUpdate(ReaderWriterFileDataSource.java:72)
at
com.vividsolutions.jump.workbench.datasource.AbstractSaveDatasetAsPlugIn.run(AbstractSaveDatasetAsPlugIn.java:33)
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper.run(TaskMonitorManager.java:151)
at java.lang.Thread.run(Unknown Source)
Is it possible to save things without geometries into shapefiles at
all? It is easy to generate test data, just create a new layer and
insert a new WKT feature as GEOMETRYCOLLECTION EMPTY and try to save
the layer. Next digitise a point, for example, on the layer, and try
saving again.
-Jukka Rahkonen-
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