Pointers to Functions with Swig

http://web.mit.edu/svn/src/swig-1.3.25/Examples/java/funcptr/index.html
http://stackoverflow.com/questions/4313004/registering-java-function-as-a-callback-in-c-function

http://stackoverflow.com/questions/12210129/how-should-i-write-the-i-file-to-wrap-callbacks-in-java-or-c-sharp

void* als jobject:
http://stackoverflow.com/questions/26110908/swig-typemap-java-object