version: Pre release version bump to v0.1.0-.1

The identify is no optional with fallback to the property key or class

CHANGELOG.md

@@ -9,17 +9,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- feat: Add new `IdentifierRequiredError` class for missing identifiers.
+- feat: Add the option to use the decorators without passing the identifier: In this case, the identifier will be the class name (register) or the property name (inject).
 - Add pre release building to release workflow on dev/* branches an version changes.
 
-
 ### Deprecated
 
 
 ### Removed
 
+- feat!: Disable `experimentalDecorators` and `emitDecoratorMetadata` in the `tsconfig.json` file to reflect the change to the stable decorators api.
 
 ### Fixed
 
+- feat!: Update `Register`, `RegisterInstance` and `Inject` decorators to reflect the change to the stable decorators api.
+- feat!: Update `Inject` Decorator typing to reflect the correct property type.
 
 ### Security
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-injex",
-  "version": "0.1.0",
+  "version": "0.1.0-.1",
   "description": "Simple boilerplate code free dependency injection system for TypeScript.",
   "type": "module",
   "main": "./dist/index.js",

src/__tests__/Decorators.spec.ts

@@ -67,6 +67,29 @@ export function test_InjectDecorator(
             expect(instance.getDependency().value).toBe('test-value-init');
         });
 
+        it('should inject dependency and run initializer without identifier', () => {
+            container.register('MockDependencyIdentifier', {
+                value: 'test-value',
+            });
+
+            class TestClass {
+                @Inject(undefined, (x: string) => {
+                    (x as unknown as { value: string }).value =
+                        'test-value-init';
+
+                    return x;
+                })
+                MockDependencyIdentifier!: any;
+
+                public getDependency() {
+                    return this.MockDependencyIdentifier;
+                }
+            }
+
+            const instance = new TestClass();
+            expect(instance.getDependency().value).toBe('test-value-init');
+        });
+
         it('should throw an error when necessary is true and the initializer throws an error', () => {
             let _error: Error | undefined = undefined;
 
@@ -78,7 +101,7 @@ export function test_InjectDecorator(
                 class TestClass {
                     @Inject(
                         'InitThrowDependencie',
-                        () => {
+                        (): any => {
                             throw new Error('Initializer error');
                         },
                         true,
@@ -275,6 +298,19 @@ export function test_RegisterDecorator(
                 TestClass,
             );
         });
+
+        it('should register a dependency without an identifier', () => {
+            @register()
+            class TestClass {
+                private readonly _dependency!: any;
+
+                public getDependency() {
+                    return this._dependency;
+                }
+            }
+
+            expect(container.resolve('TestClass')).toBe(TestClass);
+        });
     });
 }
 
@@ -311,6 +347,23 @@ export function test_RegisterInstanceDecorator(
             ).toBe('instance');
         });
 
+        it('should register an instance of a dependency with an identifier', () => {
+            @registerInstance()
+            class TestClass {
+                private readonly _dependency!: any;
+
+                public getDependency() {
+                    return this._dependency;
+                }
+
+                public mark: string = 'instance';
+            }
+
+            expect(container.resolve<TestClass>('TestClass').mark).toBe(
+                'instance',
+            );
+        });
+
         it('should register an instance of a dependency an run the init function', () => {
             @registerInstance(
                 'InstanceIdentifier',

src/decorators/Inject.ts

@@ -1,5 +1,6 @@
 import {
     DependencyResolutionError,
+    IdentifierRequiredError,
     InitializationError,
     InjectorError,
     NoInstantiationMethodError,
@@ -10,17 +11,17 @@ import { InitDelegate } from '../types/InitDelegate';
 
 /**
  * A decorator to inject a dependency from a DI (Dependency Injection) container into a class property.
- * @template T The type of the dependency to be injected.
+ * @template TargetType The type of the class to inject the dependency into.
- * @template U The type of the property to be injected.
+ * @template DependencyType The type of the dependency to be injected.
- * @param identifier The identifier used to resolve the class in the DI container.
+ * @template PropertyType The type of the property to be injected.
- * @see {@link Identifier} for more information on identifiers.
+ * @param identifier The {@link Identifier|identifier} used to resolve the dependencie in the DI container or the property name if not provided.
- * @param init Optional an initializer function to transform the dependency before injection
+ * @param init An optional initializer {@link InitDelegate|function} to transform the dependency before injection
  * or true to instantiate the dependency if it has a constructor.
- * @see {@link InitDelegate} for more information on initializer functions.
  * @param necessary If true, throws an error if the dependency is not found.
  * @returns The resolved dependency or undefined if the dependency is not necessary
  * and not found, or throws an error if the dependency is necessary and not found.
  * @throws **Only throws errors if the dependency is necessary.**
+ * @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
  * @throws A {@link DependencyResolutionError} if the dependency is not found.
  * @throws A {@link InjectorError} if an error occurs during the injection process.
  * @throws A {@link NoInstantiationMethodError} if the dependency does not have a constructor.
@@ -40,70 +41,86 @@ import { InitDelegate } from '../types/InitDelegate';
  * }
  * ```
  */
-export function Inject<T, U>(
+export function Inject<TargetType, DependencyType, PropertyType>(
-    identifier: Identifier,
+    identifier?: Identifier,
-    init?: InitDelegate<T, U> | true,
+    init?: InitDelegate<DependencyType, PropertyType> | true,
     necessary = true,
 ) {
-    return function (target: unknown, propertyKey: string | symbol): void {
+    return function (
+        constructor: undefined,
+        context: ClassFieldDecoratorContext<TargetType> & {
+            name: PropertyType;
+        },
+    ): void {
+        const _identifier = identifier ?? context.name;
+
+        if (_identifier == null && necessary === true)
+            throw new IdentifierRequiredError();
+
         /**
          * Function to evaluate the dependency lazily
          * to avoid circular dependencies, not found dependencies, etc.
          * @returns The resolved dependency or undefined if the dependency is not found.
          */
-        const resolve = (): T | undefined => {
+        const resolve = (): DependencyType | undefined => {
-            return TSinjex.getInstance().resolve<T>(identifier, necessary);
+            return TSinjex.getInstance().resolve<DependencyType>(
+                _identifier,
+                necessary,
+            );
         };
 
-        Object.defineProperty(target, propertyKey, {
+        context.addInitializer(function (this: TargetType) {
-            get() {
+            Object.defineProperty(this, context.name, {
-                let instance: T | U | undefined;
+                get() {
+                    let instance: DependencyType | PropertyType | undefined;
 
-                const dependency: T | undefined = tryAndCatch(
+                    const dependency: DependencyType | undefined = tryAndCatch(
-                    () => resolve(),
+                        () => resolve(),
-                    necessary,
+                        necessary,
-                    identifier,
+                        _identifier,
-                    DependencyResolutionError,
+                        DependencyResolutionError,
-                );
+                    );
 
-                if (dependency != null) {
+                    if (dependency != null) {
-                    const initFunction: (() => U) | undefined =
+                        const initFunction: (() => PropertyType) | undefined =
-                        typeof init === 'function' && dependency != null
+                            typeof init === 'function' && dependency != null
-                            ? (): U => init(dependency)
+                                ? (): PropertyType => init(dependency)
-                            : init === true && hasConstructor(dependency)
+                                : init === true && hasConstructor(dependency)
-                              ? (): U => new dependency() as U
+                                  ? (): PropertyType =>
-                              : undefined;
+                                        new dependency() as PropertyType
+                                  : undefined;
 
-                    if (init == null) instance = dependency;
+                        if (init == null) instance = dependency;
-                    else if (initFunction != null)
+                        else if (initFunction != null)
-                        instance = tryAndCatch(
+                            instance = tryAndCatch(
-                            initFunction,
+                                initFunction,
-                            necessary,
+                                necessary,
-                            identifier,
+                                _identifier,
-                            InitializationError,
+                                InitializationError,
-                        );
+                            );
-                    else if (necessary)
+                        else if (necessary)
-                        throw new NoInstantiationMethodError(identifier);
+                            throw new NoInstantiationMethodError(_identifier);
-                } else if (necessary)
+                    } else if (necessary)
-                    throw new DependencyResolutionError(identifier);
+                        throw new DependencyResolutionError(_identifier);
 
+                    /**
+                     * Replace itself with the resolved dependency
+                     * for performance reasons.
+                     */
+                    Object.defineProperty(this, context.name, {
+                        value: instance,
+                        writable: false,
+                        enumerable: false,
+                        configurable: false,
+                    });
+
+                    return instance;
+                },
                 /**
-                 * Replace itself with the resolved dependency
+                 * Make the property configurable to allow replacing it
-                 * for performance reasons.
                  */
-                Object.defineProperty(this, propertyKey, {
+                configurable: true,
-                    value: instance,
+            });
-                    writable: false,
-                    enumerable: false,
-                    configurable: false,
-                });
-
-                return instance;
-            },
-            /**
-             * Make the property configurable to allow replacing it
-             */
-            configurable: true,
         });
     };
 }

src/decorators/Register.ts

@@ -1,14 +1,14 @@
+import { IdentifierRequiredError } from 'src/interfaces/Exceptions';
 import { TSinjex } from '../classes/TSinjex';
 import { Identifier } from '../types/Identifier';
 
 /**
  * A decorator to register a class in the **TSinjex** DI (Dependency Injection) container.
  * @template TargetType The type of the class to be registered.
- * @param identifier The identifier used to register the class in the DI container.
+ * @param identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
- * @see {@link Identifier} for more information on identifiers.
+ * @param deprecated If true, the dependency is deprecated and a warning is logged only once upon the first resolution of the dependency.
- * @param deprecated If true, the dependency is deprecated and a warning
- * is logged only once upon the first resolution of the dependency.
  * @returns The decorator function to be applied on the class.
+ * @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
  * @example
  * ```ts
  * \@Register('MyClassIdentifier')
@@ -19,12 +19,16 @@ import { Identifier } from '../types/Identifier';
  */
 export function Register<
     TargetType extends new (...args: unknown[]) => InstanceType<TargetType>,
->(identifier: Identifier, deprecated?: boolean) {
+>(identifier?: Identifier, deprecated?: boolean) {
-    return function (constructor: TargetType, ...args: unknown[]): void {
+    return function (
-        // Get the instance of the DI container
+        constructor: TargetType,
-        const diContainer = TSinjex.getInstance();
+        context: ClassDecoratorContext<TargetType>,
+    ) {
+        const _identifier = identifier ?? context.name;
 
-        // Register the class in the DI container
+        if (_identifier == null) throw new IdentifierRequiredError();
-        diContainer.register(identifier, constructor, deprecated);
+
+        const diContainer = TSinjex.getInstance();
+        diContainer.register(_identifier, constructor, deprecated);
     };
 }

src/decorators/RegisterInstance.ts

@@ -1,3 +1,4 @@
+import { IdentifierRequiredError } from 'src/interfaces/Exceptions';
 import { TSinjex } from '../classes/TSinjex';
 import { Identifier } from '../types/Identifier';
 import { InitDelegate } from '../types/InitDelegate';
@@ -5,12 +6,11 @@ import { InitDelegate } from '../types/InitDelegate';
 /**
  * A decorator to register an instance of a class in the DI (Dependency Injection) container.
  * @template TargetType The type of the class whose instance is to be registered.
- * @param identifier The identifier used to register the instance in the DI container.
+ * @param identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
- * @see {@link Identifier} for more information on identifiers.
+ * @param init An optional initializer {@link InitDelegate|function} which get the constructor of the class
- * @param init An optional initializer function which get the constructor of the class
  * as input and returns an instance of the class.
- * @see {@link InitDelegate} for more information on initializer functions.
  * @returns The decorator function to be applied on the class.
+ * @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
  * @example
  * ```ts
  * \@RegisterInstance('MyClassInstanceIdentifier', (constructor) => new constructor())
@@ -22,43 +22,51 @@ import { InitDelegate } from '../types/InitDelegate';
 export function RegisterInstance<
     TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
 >(
-    identifier: Identifier,
+    identifier?: Identifier,
     init?: InitDelegate<
         TargetType & { new (..._args: unknown[]): InstanceType<TargetType> },
         InstanceType<TargetType>
     >,
 ) {
-    return function (constructor: TargetType, ...args: unknown[]): void {
+    return function (
-        // Get the instance of the DI container
+        constructor: TargetType,
+        context: ClassDecoratorContext<TargetType>,
+    ): void {
+        const _identifier = identifier ?? context.name;
+
+        if (_identifier == null) throw new IdentifierRequiredError();
+
         const diContainer = TSinjex.getInstance();
         let instance: InstanceType<TargetType>;
 
+        /**
+         * Get the instance of the class
+         * and replace the lazy proxy with the instance
+         * for performance optimization.
+         */
+        const getAndRegisterInstance = (): void => {
+            if (instance == null) {
+                if (init) {
+                    instance = init(constructor);
+                } else {
+                    instance = new constructor();
+                }
+            }
+            diContainer.register(_identifier, instance);
+        };
+
         // Create a proxy to instantiate the class when needed (Lazy Initialization)
-        let lazyProxy: unknown = new Proxy(
+        const lazyProxy: unknown = new Proxy(
             {},
             {
-                get(target, prop, receiver) {
+                get(_target, prop, _receiver) {
-                    if (instance == null) {
+                    getAndRegisterInstance();
-                        if (init) {
-                            instance = init(constructor);
-                        } else {
-                            instance = new constructor(...args);
-                        }
-                    }
-                    lazyProxy = instance;
 
                     // Return the requested property of the instance
                     return instance[prop as keyof InstanceType<TargetType>];
                 },
-                set(target, prop, value, receiver) {
+                set(_target, prop, value, _receiver) {
-                    if (instance == null) {
+                    getAndRegisterInstance();
-                        if (init) {
-                            instance = init(constructor);
-                        } else {
-                            instance = new constructor(...args);
-                        }
-                    }
-                    lazyProxy = instance;
 
                     // Set the requested property of the instance
                     return (instance[prop as keyof InstanceType<TargetType>] =
@@ -67,7 +75,6 @@ export function RegisterInstance<
             },
         );
 
-        // Register the lazy proxy in the DI container
+        diContainer.register(_identifier, lazyProxy);
-        diContainer.register(identifier, lazyProxy);
     };
 }

src/interfaces/Exceptions.ts

@@ -15,6 +15,19 @@ export class TSinjexError extends Error {
     }
 }
 
+/**
+ * Error class for missing identifiers in {@link ITSinjex} methods.
+ */
+export class IdentifierRequiredError extends TSinjexError {
+    /**
+     * Creates a new instance of {@link IdentifierRequiredError}
+     */
+    constructor() {
+        super('Identifier is required.');
+        this.name = 'TSinjexIdentifierRequiredError';
+    }
+}
+
 /**
  * Error class for dependency resolution errors in {@link ITSinjex}.
  * @see {@link ITSinjex.resolve}

tsconfig.json

@@ -18,8 +18,6 @@
         "importHelpers": true,
         "isolatedModules": true,
         "resolveJsonModule": true,
-        "experimentalDecorators": true,
-        "emitDecoratorMetadata": true,
         "strictNullChecks": true,
         "strictPropertyInitialization": true,
         "lib": [