static TRI_key_generator_t* CreateGenerator (const TRI_json_t* const parameters) {
TRI_key_generator_t* generator;
generator_type_e type;
type = GeneratorType(parameters);
if (type == TYPE_UNKNOWN) {
return NULL;
}
generator = (TRI_key_generator_t*) TRI_Allocate(TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_key_generator_t), false);
if (generator == NULL) {
return NULL;
}
generator->_data = NULL;
if (type == TYPE_TRADITIONAL) {
generator->init = &TraditionalInit;
generator->generate = &TraditionalGenerate;
generator->free = &TraditionalFree;
generator->track = NULL;
generator->toJson = &TraditionalToJson;
}
else if (type == TYPE_AUTOINCREMENT) {
generator->init = &AutoIncrementInit;
generator->generate = &AutoIncrementGenerate;
generator->free = &AutoIncrementFree;
generator->track = &AutoIncrementTrack;
generator->toJson = &AutoIncrementToJson;
}
return generator;
}
inline TargetType operator()(const SourceType& source) const {
const auto center = source.getCenter();
const auto radius = source.getRadius();
static const auto extend = typename VectorSpaceType::VectorType(GeneratorType(ScalarFieldType::multiplicativeNeutral()),
std::make_index_sequence<VectorSpaceType::VectorType::dimensionality()>{}) * radius;
return TargetType(center - extend, center + extend);
}
