src/annotation/injectable.ts
import * as ERRORS_MSGS from '../constants/error_msgs';
import * as METADATA_KEY from '../constants/metadata_keys';
function injectable() {
return function <T extends abstract new (...args: any) => unknown>(target: T) {
if (Reflect.hasOwnMetadata(METADATA_KEY.PARAM_TYPES, target)) {
throw new Error(ERRORS_MSGS.DUPLICATED_INJECTABLE_DECORATOR);
}
const types = Reflect.getMetadata(METADATA_KEY.DESIGN_PARAM_TYPES, target) || [];
Reflect.defineMetadata(METADATA_KEY.PARAM_TYPES, types, target);
return target;
};
}
export { injectable };