JNIEXPORT jint JNICALL Java_ml_dmlc_mxnet_LibInfo_mxNDArrayGetShape(JNIEnv *env, jobject obj,
jobject ndArrayHandle,
jobject ndimRef,
jobject dataBuf) {
jclass refLongClass = env->FindClass("ml/dmlc/mxnet/Base$RefLong");
jfieldID refLongFid = env->GetFieldID(refLongClass, "value", "J");
jlong ndArrayPtr = env->GetLongField(ndArrayHandle, refLongFid);
mx_uint ndim;
const mx_uint *pdata;
int ret = MXNDArrayGetShape((NDArrayHandle)ndArrayPtr, &ndim, &pdata);
// fill dataBuf
jclass integerClass = env->FindClass("java/lang/Integer");
jmethodID newInteger = env->GetMethodID(integerClass, "<init>", "(I)V");
jclass arrayClass = env->FindClass("scala/collection/mutable/ArrayBuffer");
jmethodID arrayAppend = env->GetMethodID(arrayClass,
"$plus$eq", "(Ljava/lang/Object;)Lscala/collection/mutable/ArrayBuffer;");
for (int i = 0; i < ndim; ++i) {
jobject data = env->NewObject(integerClass, newInteger, pdata[i]);
env->CallObjectMethod(dataBuf, arrayAppend, data);
}
// set ndimRef
jclass refIntClass = env->FindClass("ml/dmlc/mxnet/Base$RefInt");
jfieldID valueInt = env->GetFieldID(refIntClass, "value", "I");
env->SetIntField(ndimRef, valueInt, ndim);
return ret;
}
inline std::vector<mx_uint> NDArray::GetShape() const {
const mx_uint *out_pdata;
mx_uint out_dim;
MXNDArrayGetShape(blob_ptr_->handle_, &out_dim, &out_pdata);
std::vector<mx_uint> ret;
for (mx_uint i = 0; i < out_dim; ++i) {
ret.push_back(out_pdata[i]);
}
return ret;
}