Replacement for DefaultFactories in Apache SIS 1.4

[Michael Arneson <mi...@geotoolkit.net>]

I was using the following code to in Apache 1.3 to convert a geog2D
transformation to a geog3D transformation.

        CoordinateOperation operation = ...
        ParameterValueGroup srcp = ((SingleOperation)
operation).getParameterValues();
        String oldName = ((SingleOperation)
operation).getMethod().getName().getCode();
        String newName = oldName.replace("geog2D", "geog3D");

        MathTransformFactory mtFactory =
DefaultFactories.forClass(MathTransformFactory.class);
        ParameterValueGroup tgtp = mtFactory.getDefaultParameters(newName);
        Ellipsoid sourceEllipsoid = ((GeographicCRS)
operation.getSourceCRS()).getDatum().getEllipsoid();
        Ellipsoid targetEllipsoid = ((GeographicCRS)
operation.getTargetCRS()).getDatum().getEllipsoid();

tgtp.parameter("src_semi_major").setValue(sourceEllipsoid.getSemiMajorAxis(),
sourceEllipsoid.getAxisUnit());

tgtp.parameter("src_semi_minor").setValue(sourceEllipsoid.getSemiMinorAxis(),
sourceEllipsoid.getAxisUnit());

tgtp.parameter("tgt_semi_major").setValue(targetEllipsoid.getSemiMajorAxis(),
targetEllipsoid.getAxisUnit());

tgtp.parameter("tgt_semi_minor").setValue(targetEllipsoid.getSemiMinorAxis(),
targetEllipsoid.getAxisUnit());
        ...

Since  DefaultFactories has been removed in Apache SIS 1.4, what would be
the best way to modify this code to work with Apache SIS 1.4?

Thanks,
-- 
*Michael Arneson*

*Software Engineer*



*Office:* +1 (713) 975-7434

michael.arneson@int.com

*INT *| *Empowering Visualization*

Re: Replacement for DefaultFactories in Apache SIS 1.4

[Martin Desruisseaux <ma...@geomatys.com>]

Hello Michael

Le 2024-03-22 à 18 h 18, Michael Arneson a écrit :

> I was using the following code to in Apache 1.3 to convert a geog2D 
> transformation to a geog3D transformation.
>
>         (…snip…)
>         MathTransformFactory mtFactory = 
> DefaultFactories.forClass(MathTransformFactory.class);
>         (…snip…)
>
> Since DefaultFactories has been removed in Apache SIS 1.4, what would 
> be the best way to modify this code to work with Apache SIS 1.4?


It can be done as below:

    MathTransformFactory mtFactory = DefaultMathTransformFactory.provider();

The "provider" method name is mandated by the Java Module System (a.k.a. 
"Jigsaw"). The replacement of the `DefaultFactories` class by 
`provider()` static methods was part of the SIS modularization work. 
Note that `DefaultFactories` was an internal class, while those new 
`provider()` methods are in public API, so they are not expected to change.

     Martin


P.S.: the work for upgrading to ISO 19111:2019 is in progress right now. 
First on GeoAPI, SIS will follow next. If you are curious, the work can 
be seen at [1]. Once completed, SIS will be able (at last) to upgrade to 
latest EPSG dataset versions.

[1]https://github.com/opengeospatial/geoapi/commits/master/