src/decorators.ts
import { interfaces } from "inversify";
const INJECTION = Symbol.for("INJECTION");
function _proxyGetter(
proto: any,
key: string,
resolve: () => any,
doCache: boolean
) {
function getter() {
if (doCache && !Reflect.hasMetadata(INJECTION, this, key)) {
Reflect.defineMetadata(INJECTION, resolve(), this, key);
}
if (Reflect.hasMetadata(INJECTION, this, key)) {
return Reflect.getMetadata(INJECTION, this, key);
} else {
return resolve();
}
}
function setter(newVal: any) {
Reflect.defineMetadata(INJECTION, newVal, this, key);
}
Object.defineProperty(proto, key, {
configurable: true,
enumerable: true,
get: getter,
set: setter
});
}
function makePropertyInjectDecorator(container: interfaces.Container, doCache: boolean) {
return function(serviceIdentifier: interfaces.ServiceIdentifier<any>) {
return function(proto: any, key: string): void {
let resolve = () => {
return container.get(serviceIdentifier);
};
_proxyGetter(proto, key, resolve, doCache);
};
};
}
function makePropertyInjectNamedDecorator(container: interfaces.Container, doCache: boolean) {
return function(serviceIdentifier: interfaces.ServiceIdentifier<any>, named: string) {
return function(proto: any, key: string): void {
let resolve = () => {
return container.getNamed(serviceIdentifier, named);
};
_proxyGetter(proto, key, resolve, doCache);
};
};
}
function makePropertyInjectTaggedDecorator(container: interfaces.Container, doCache: boolean) {
return function(serviceIdentifier: interfaces.ServiceIdentifier<any>, key: string, value: any) {
return function(proto: any, propertyName: string): void {
let resolve = () => {
return container.getTagged(serviceIdentifier, key, value);
};
_proxyGetter(proto, propertyName , resolve, doCache);
};
};
}
function makePropertyMultiInjectDecorator(container: interfaces.Container, doCache: boolean) {
return function(serviceIdentifier: interfaces.ServiceIdentifier<any>) {
return function(proto: any, key: string): void {
let resolve = () => {
return container.getAll(serviceIdentifier);
};
_proxyGetter(proto, key, resolve, doCache);
};
};
}
export {
makePropertyInjectDecorator,
makePropertyMultiInjectDecorator,
makePropertyInjectTaggedDecorator,
makePropertyInjectNamedDecorator
};