// GoByteArray converts the provided Java byte array into a Go byte slice.
func GoByteArray(env Env, arr Object) (ret []byte) {
if arr.IsNull() {
return nil
}
length := int(C.GetArrayLength(env.value(), C.jarray(arr.value())))
ret = make([]byte, length)
bytes := C.GetByteArrayElements(env.value(), C.jbyteArray(arr.value()), nil)
defer C.ReleaseByteArrayElements(env.value(), C.jbyteArray(arr.value()), bytes, C.JNI_ABORT)
ptr := bytes
for i := 0; i < length; i++ {
ret[i] = byte(*ptr)
ptr = (*C.jbyte)(unsafe.Pointer(uintptr(unsafe.Pointer(ptr)) + unsafe.Sizeof(*ptr)))
}
return
}
// GoLongArray converts the provided Java long array into a Go int64 slice.
func GoLongArray(env Env, arr Object) (ret []int64) {
if arr.IsNull() {
return
}
length := int(C.GetArrayLength(env.value(), C.jarray(arr.value())))
ret = make([]int64, length)
elems := C.GetLongArrayElements(env.value(), C.jlongArray(arr.value()), nil)
defer C.ReleaseLongArrayElements(env.value(), C.jlongArray(arr.value()), elems, C.JNI_ABORT)
ptr := elems
for i := 0; i < length; i++ {
ret[i] = int64(*ptr)
ptr = (*C.jlong)(unsafe.Pointer(uintptr(unsafe.Pointer(ptr)) + unsafe.Sizeof(*ptr)))
}
return
}
// GoObjectArray converts a Java object array to a Go slice of Java objects.
func GoObjectArray(env Env, arr Object) ([]Object, error) {
if arr.IsNull() {
return nil, nil
}
length := int(C.GetArrayLength(env.value(), C.jarray(arr.value())))
ret := make([]Object, length)
for i := 0; i < length; i++ {
ret[i] = Object(uintptr(unsafe.Pointer(C.GetObjectArrayElement(env.value(), C.jobjectArray(arr.value()), C.jsize(i)))))
if err := JExceptionMsg(env); err != nil {
// Out-of-bounds index.
return nil, err
}
}
return ret, nil
}