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From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SIS-442) Cache CRS.findOperation(…, areaOfInteret) when area of interest is non null
Date Fri, 14 Dec 2018 18:34:00 GMT

     [ https://issues.apache.org/jira/browse/SIS-442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Desruisseaux updated SIS-442:
------------------------------------
    Fix Version/s: 1.1

> Cache CRS.findOperation(…, areaOfInteret) when area of interest is non null
> ---------------------------------------------------------------------------
>
>                 Key: SIS-442
>                 URL: https://issues.apache.org/jira/browse/SIS-442
>             Project: Spatial Information Systems
>          Issue Type: Task
>          Components: Referencing
>    Affects Versions: 0.7, 0.8
>            Reporter: Martin Desruisseaux
>            Priority: Major
>             Fix For: 1.1
>
>
> Calls to {{CRS.findOperation(sourceCRS, targetCRS, areaOfInterest)}} currently cache
the {{CoordinateOperation}} only when {{areaOfInterest}} is null. It is hard to implement
a general cache mechanism for all non-null area of interest, but we can implement an intermediate
solution:
> 1. When {{EPSGFactory}} or {{CoordinateOperationRegistry}} detects that there is only
one {{CoordinateOperation}} for given source and target CRS, it automatically adds some sentinel
value in {{PositionalAccuracy}} metadata. It could be some internal sub-class.
> 2. When {{DefaultCoordinateOperationFactory}} sees above sentinel values, it allows caching
even if {{areaOfInterest}} is non-null. Otherwise caching is enabled only if {{areaOfInterest}}
is null, as today.
> We could also take this opportunity for adding an information message if we detected
may transformations for the same pair of CRS. Something like _"Note: many transformations
are defined for this pair of referencing systems in different domains of validity."_



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