[gdal-dev] Java API: how to find dimensions of MDArray

[Barry DeZonia]

Thanks Even.

I might be able to find some time to do the SWIG work depending upon the
amount of development time needed. I am a long time developer with
experience in Java, C, and C++ (but have not used SWIG before). Is it just
a few signatures I need to write or do I need to write full support for a
GDALDimension class? Can you comment on this?

Am I right in understanding that, as of the current Java implementation,
one really can't use MDArrays for much? Like if I can't find the number of
(... z planes, t steps, channels, etc.) of data I will not be able to
reconstruct the data?

On Sat, Jun 3, 2023 at 6:09 AM Even Rouault <even.rouault at spatialys.com>
wrote:

> Barry,
>
> This method is indeed not available currently in the Java bindings. It is
> only available currently in the Python bindings (see
> https://github.com/OSGeo/gdal/blob/master/swig/include/MultiDimensional.i#L159
> ) , since it requires writing a specific SWIG typemap for each binding
> language when a method returns (or takes as argument) a new non-primitive
> type such as here, with an array of dimensions. The closest existing Java
> typemap I found that can be used to take inspiration from is
> https://github.com/OSGeo/gdal/blob/master/swig/include/java/typemaps_java.i#L235
> but there would be changes to call the "Dimension(long cPtr, boolean
> cMemoryOwn)" constructor.  Whether you want to try to tackle that yourself
> or not, you may create a ticket about that
>
> Even
> Le 03/06/2023 à 09:09, Barry DeZonia a écrit :
>
> On a related note is the Java api code in a public repo somewhere? It
> would be helpful to look at that code sometimes. (Like is GetDimensions()
> present in the Java code but not exposed as a public method?)
>
> On Sat, Jun 3, 2023 at 12:18 AM Barry DeZonia <bdezonia at gmail.com> wrote:
>
>> Hi all,
>>
>> I have access to an MDArray. I am trying to find its dimensions. In the
>> C++ API I can see that GDALMDArray has a method called GetDimensions() to
>> find the info I need. But I am programming in Java and the Java API does
>> not show such a call for MDArray. Is there some way in Java to find the
>> info I need?
>>
>
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