I had a go and ProcessingCollection extends BaseFeatureCollection, and arrived
at one critical implementation difference.
ProcessingFeatureCollection takes care to lazily create the schema; I can image
for some process this work can be
fairly significant.
Additional helper methods:
- DataUtilities.bounds( FeatureCollection ) <-- already existed
- DataUtilities.bounds( FeatureIterator )
- DataUtilities.count( FeatureCollection )
- DataUtilities.count( FeatureIterator )
Once again I hope this reduce the amount of duplication in our codebase, I
added the bounds( FeatureIterator ) method to make it clear that the
calculation was limited to traversing the features manually.
--
Jody Garnett
On Sunday, 4 November 2012 at 1:32 PM, Jody Garnett wrote:
> > > - RasterAsPointFeatureCollection now extends BaseFeatureCollection in
> > > order
> > > to avoid the use of WrappingIterator
> > >
> >
> > Hum... ok, Wondering what level of overlap there is now between
> > BaseFeatureCollection
> > and that processing oriented feature collection base I've made some time ago
> >
>
> Checking it out.
>
> Looks like I could break out BaseFeatureCollection /
> BaseSimpleFeatureCollection (no sense making app-schema work harder) and save
> us some code duplication.
>
> BaseFeatureCollection extends SimpleFeatureCollection
> ================
> abstract:
> - features()
> recommend
> - getBounds()
> - size();
>
> Notes:
> - sort() is implemented using Uses SubFeatureList.
>
> ProcessingCollection extends FeatureCollection
> ===============
> requires:
> - features()
> - getBounds()
> - size()
> - buildTargetFeatureType()
>
> Notes:
> - sort() is implemented using SortedSimpleFeatureCollection
> - ProcessingCollection.accepts does not check progress.isCanceled
> - ProcessingCollection.accepts immediately throws any Exception (as an
> IOException) that occurs
>
>
>
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