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Posted to dev@lucene.apache.org by "Karl Wright (JIRA)" <ji...@apache.org> on 2017/08/21 11:23:00 UTC

[jira] [Commented] (LUCENE-7936) Extend Geoshape interfaces so objects can be copied/serialized

    [ https://issues.apache.org/jira/browse/LUCENE-7936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16135047#comment-16135047 ] 

Karl Wright commented on LUCENE-7936:
-------------------------------------

Hi [~ivera], I'm not happy with exposing internal representational information everywhere.

For copying, I greatly prefer that objects know how to copy themselves.  Implementing Cloneable is one standard way to do that, rather than make lots of public accessors.  Same goes for serialization -- you can either implement Serializable, which has a lot of problems, or you can use one of the java serialization frameworks.

The issue is that I don't know what standards Lucene uses elsewhere.  I will do some asking around and get back to you on that.



> Extend Geoshape interfaces so objects can be copied/serialized
> --------------------------------------------------------------
>
>                 Key: LUCENE-7936
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7936
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/spatial3d
>            Reporter: Ignacio Vera
>            Assignee: Karl Wright
>         Attachments: LUCENE-7936.patch
>
>
> Hi [~david.wright@bksv.com],
> I would like to propose to extends the GeoShape interfaces to be able to copy/serialized the objects. The current status and  propose change is as following:
> GeoPoint: It can be serialized by using x, y, z
> GeoCircle:  It can be serialized by using getCenter() and getRadius() and getPlanetModel()
> GeoCompositeShape: It can be serialized by accesing shapes using size() and GetShape(int index)
> GeoPath: add methods to the interface getPoints() and getCutoffAngle()
> GeoPolygon: This is the most complicated one as we have different types:
>    1.- GeoCompositePolygon is just a composite
>    2.- GeoConcavePolygon and GeoConvexPolygon: Create a new interface for those polygons which exposes the points, holes, internaledges and concavity/convexity
>    3.- GeoComplexPolygons: Do nothing, they are too complex to be serialize??
> I am intersested in accesing the discreatization of the polygons into convex and concave ones for other reasons as well. I think this should be expose as they end result can be used for other use cases.
> Cheers,
> I.
>   



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