Hi, FYI,
A bunch of these issues were dealt with in the TransactionStateDiff. It had these problems at one point and have since then been solved. It is a slightly more complicated problem because it is only the difference but I'd guess the principals for solving the problem are about the same. It also has a spatial index built in. So if you're feeling ambitious you could put that in the transactionStateDiff as well. Jesse Le 3-Feb-08 à 8:06 AM, johann Sorel a écrit : > > I need a MemoryDataStore for those reasons : > - I need a Geometry field, shapefile only support Point/Polygon... > Only one unique type possible, I need all types > - I only have one field (Geometry) and only on or two geometries in > it, there's not enough features to have a important impact on > performance. > - Using a file/table for this... is just crazy. I need an in memory > solution. > > > >> >> This kind of error occurrs for a number of things occurring togheter: >> * the memory data store using a LinkedHashMap to store features >> (hashmap >> to provide very fast fid based access, linked to preserve insertion >> order) >> * renderer scanning thru the map using an iterator over the original >> LinkedHashMap >> * editor changing the contents of the above collection while the >> renderer is working on it >> >> Ways to solve this problem. Quick ideas are: >> * have FeatureIterator objects take a snapshot of the LinkedHashMap >> contents and work on top of it. Not a deep copy btw, a shallow one >> that just give the iterator its own collection that no one else will >> touch >> * change from LinkedHashMap to something else that won't throw a >> ConcurrentModificationException... could not find any. Yet, >> if ArrayList was used, a loop like: >> for(int i = 0; i < size(); i++) >> features.get(i) >> would not throw an exception >> >> One last thing... why are you using a MemoryDataStore? The last >> time I >> tried it, it was very slow, significantly slower than shapefiles for >> example, this is due to cloning, the same iterator that scans thru >> the features collection will clone them so that any change to the >> returned feature won't affect the datastore internals. >> >> Cheers >> Andrea > > ____________________________________________________________ > FREE ONLINE PHOTOSHARING - Share your photos online with your > friends and family! > Visit http://www.inbox.com/photosharing to find out more! > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Geotools-devel mailing list > Geotools-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geotools-devel ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
