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From "David Smiley (JIRA)" <>
Subject [jira] [Commented] (LUCENE-4167) Remove the use of SpatialOperation
Date Thu, 28 Jun 2012 04:09:44 GMT


David Smiley commented on LUCENE-4167:

I agree that something could/should be done to improve the awareness of exactly which operations
a Strategy supports.  This is of course just one aspect of a Strategy's limitations, consider
wether or not the Strategy supports multi-value data or wether it supports indexing non-point
shapes.  Surely *that* is quite relevant to a potential client.  It seems very doubtful to
me that the compile-time type checks could be added for everything.  And even with spatial
operations -- there are a lot of them to support, and wouldn't it be twice as many for both
makeXXXQuery & makeXXXFilter?  I don't know where you would draw the line.  At least the
current interface is fairly simple, and there is always Javadocs.

That said, I look forward to seeing any patches you may having demonstrating what you have
in mind.  Maybe I just won't get it until I see it.

bq. How we map this into any Client / Server interaction or a query language should be the
responsibility of those classes, not the Strategies.

> Remove the use of SpatialOperation
> ----------------------------------
>                 Key: LUCENE-4167
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: modules/spatial
>            Reporter: Chris Male
>         Attachments: LUCENE-4167.patch
> Looking at the code in TwoDoublesStrategy I noticed SpatialOperations.BBoxWithin vs isWithin
which confused me.  Looking over the other Strategys I see that really only isWithin and Intersects
is supported.  Only TwoDoublesStrategy supports IsDisjointTo.  The remainder of SpatialOperations
are not supported.
> I don't think we should use SpatialOperation as this stage since it is not clear what
Operations are supported by what Strategys, many Operations are not supported, and the code
for handling the Operations is usually the same.  We can spin off the code for TwoDoublesStrategy's
IsDisjointTo support into a different Strategy.

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