cdef extern from "cythonjni.h" :
    ctypedef struct RET_jlong :
        pass
    ctypedef struct RET_jint :
        pass
    ctypedef struct RET_void :
        pass
    RET_jlong long_toRET(long)
    RET_jint int_toRET(int)

cdef extern from "jni.h" :
    ctypedef struct JNIEnv :
        pass
    ctypedef struct jlong :
        pass
    ctypedef struct jint :
        pass
    ctypedef struct jclass :
        pass
    ctypedef struct jobject :
        pass
    ctypedef struct JavaVM :
        pass
    RET_jint JNI_VERSION_1_2

cdef extern from "Python.h" :
    void Py_Initialize()

cdef extern void init_hello ()

cdef public RET_jint JNI_OnLoad (JavaVM* jvm, void* reserved) :
    """Function called by the JVM just after _hello.so is loaded. It
    initializes the Python runtime as well as module _hello.
    """
    Py_Initialize()
    init_hello()
    ## uncomment this line to observe ImportError on missing _Py_ZeroStruct
    #import hello
    return JNI_VERSION_1_2

import hello
_instances = {}
cdef long last = 0

cdef public RET_jlong Java_Hello_pyinit (JNIEnv * env, jclass cls, jint base) :
    """Wrapper for hello.Hello.__init__. Each created instance is
    assigned a number that will be used to reference the object from
    the Java side. This number is maintained as long value 'last'
    above, instances are kept in dict '_instances' above.
    """
    global last
    cdef long ident = last
    last += 1
    _instances[ident] = hello.Hello(<int>base)
    return long_toRET(ident)

cdef public RET_jlong Java_Hello_pydel (JNIEnv * env, jobject obj, jlong ident) :
    """Function called when the Java object is garbage collected in
    order to delete the corresponding Python object.
    """
    del _instances[<long>ident]
    #print "*** GC removed object #%s" % (<long>ident)
    return long_toRET(<long>ident)

cdef public RET_jint Java_Hello_pyadd (JNIEnv * env, jobject obj, jlong ident, jint nbr) :
    """Wrapper for method hello.Hello.add
    """
    cdef int ret
    ret = _instances[<long>ident].add(<int>nbr)
    return int_toRET(ret)