[gdal-dev] Issues with Java Bindings in 1.5 ...

[Rick Brownrigg]

I have spent some time investigating the build issues for the Java 
bindings in 1.5, and for the most part there are a couple of nearly 
trivial fixes to the Makefile and the environment settings that are 
required. However, the most troublesome issue seems to be a swig 
type-mapping issue, which at present I do not know how to correct. It 
centers upon the gdal type ColorEntry, which is mapped in 
...../swig/include/gdal.i    For reasons I don't understand, the 
generated file ..../swig/java/org/gdal/gdal/ColorEntry.java tries to 
pass arguments of type long (a pointer presumably) to the various native 
settors/gettors implemented in gdalJNI.java (also a generated file), 
which is expecting java.awt.Color objects instead. Hence the code will 
not compile.  I don't understand the source of the mismatch, 
particularly as these two files are generated by swig.

Note that this mismatch was present in 1.4.x, but was masked by a #ifdef 
SWIGCSHARP directive around the mapping in gdal.i.  (and thus there was 
no Java proxy for the gdal type ColorEntry in 1.4.x (?)).

I had indicated I would volunteer to support the Java bindings, but with 
this experience, I am now not confident  that I can do so in a timely 
fashion.

FWIW...
Rick Brownrigg