Re: [Geotools-devel] Sequentially writing to shapfile ( FeaturStore / Transaction)

[Jesse E. <jes...@ca...>]

Hi,

The shapefile system is in need of some work that I plan on doing at  
some point in the future.  The problem is that when the datastore was  
written it did not use the mechanism for deleting records that is  
built into the spec where you can null out a geometry indicated it was  
deleted.  So there is a funny mechanism that for each change the file  
is written to a temporary file and then copied back (or moved) to the  
original location.  There is nothing to be done about this until this  
issue is fixed.  I plan on doing it but I have no time line as of  
yet.  At least not with some pretty nasty hacking and completely going  
around the Datastore API to access the low level methods.

Jesse


On 18-Dec-08, at 9:03 AM, Peter Friess wrote:

> Hi All,
>
> I am testing GeoTools for creating shape files. I typically have to  
> deal with a couple million points (~1 - 3 millions). Therefore, I am  
> looking for a way to sequentially write features to the shape-file.  
> I repeatedly generate a "FeatureCollection<SimpleFeatureType,  
> SimpleFeature> collection", add the collection to the  
> "FeatureStore<SimpleFeatureType, SimpleFeature> featureStore" and  
> call transaction.commit. It seems to me that whenever I call  
> transaction.commit all features in the featureStore are written to  
> file, as the more features I add the slower the transaction.commit.
>
> How can I control the process of writing features to a shape file,  
> such that I can sequentially add a  
> "FeatureCollection<SimpleFeatureType, SimpleFeature> collection" to  
> the shape file?
>
> Thanks,
> Peter
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