fix: Test

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

CHANGELOG.md

@@ -9,56 +9,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-
-### Deprecated
-
-
-### Removed
-
-
-### Fixed
-
-
-### Security
-
-## [0.3.0]
-
-### Added
-
-- refactor: consolidate registration decorators
-  Introduced Register decorator to handle class and instance registration in the DI container.
-  Deprecated RegisterInstance in favor of Register, which now internally handles instance registration.
-  Added support for marking dependencies as deprecated with a warning logged upon first resolution.
-  Updated documentation with examples and notes on deprecation.
-- tests: add mode parameter to RegisterInstanceDecorator
-  Introduced a mode parameter to the test_RegisterInstanceDecorator function allowing 'instance' or 'standalone' modes.
-  Updated test cases to utilize the new mode parameter when registering an instance.
-  Disabled specific ESLint rule in Decorators.test.ts for deprecation warnings.
-  Added an additional test call to test_RegisterInstanceDecorator with 'instance' mode.
-- refactor: add region tags for overloads in Register.ts
-
-## [0.2.0]
-
-### 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.
-- feat: Introduced a new CLI command `tsinjex-generate` to automate the generation of import statements for registered dependencies.  
-  The command scans `.ts` files for `@Register` and `@RegisterInstance` decorators and generates an `auto-imports.ts` file.  
-  This ensures that all registered dependencies are automatically included without requiring manual imports.  
-  The CLI can be executed via `npx tsinjex-generate` or added as a script in `package.json` for easier integration.
-
 
 ### 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
 
+
 ## [0.0.14]
 
 ### Added
@@ -90,6 +59,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ---
 
 [unreleased]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.14...HEAD
-[0.0.14]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.13...v0.0.14
-[0.2.00]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.14...v0.2.0
-[0.3.00]: https://github.com/PxaMMaxP/TSinjex/compare/0.2.0...v0.3.0
+[0.0.14]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.13...v0.0.14

bin/generate-imports.cjs

@@ -1,111 +0,0 @@
-#!/usr/bin/env node
-
-const fs = require('fs');
-const path = require('path');
-const yargs = require('yargs');
-
-// CLI argument parsing
-const argv = yargs
-  .option('src', {
-    alias: 's',
-    type: 'string',
-    description: 'Directory to search for files',
-    default: 'src',
-  })
-  .option('output', {
-    alias: 'o',
-    type: 'string',
-    description: 'Path to the output file',
-    default: 'src/auto-imports.ts',
-  })
-  .option('pattern', {
-    alias: 'p',
-    type: 'string',
-    description: 'File pattern to search for (e.g., .ts, .js)',
-    default: '.ts',
-  })
-  .help()
-  .argv;
-
-// Fixed RegEx patterns for decorator detection
-const SEARCH_PATTERNS = [
-  /^@Register(?:<(.+)?>)?\(\s*["']{1}(.+)?["']{1}\s*,?\s*(true|false)?\s*\)/m, // Matches @Register(...)
-  /^@RegisterInstance(?:<(.+)?>)?\(\s*["']{1}(.+)?["']{1}\s*,?\s*(.+)?\s*\)/m, // Matches @RegisterInstance(...)
-];
-
-const FILE_PATTERN = argv.pattern.startsWith('.') ? argv.pattern : `.${argv.pattern}`; // Ensure the pattern starts with a dot
-
-/**
- * Recursively searches for all files in a directory matching the specified pattern.
- * @param {string} dirPath - The directory to search.
- * @returns {string[]} - List of matching files.
- */
-function getAllFiles(dirPath) {
-  let files = fs.readdirSync(dirPath);
-  let arrayOfFiles = [];
-
-  files.forEach((file) => {
-    const fullPath = path.join(dirPath, file);
-    if (fs.statSync(fullPath).isDirectory()) {
-      arrayOfFiles = arrayOfFiles.concat(getAllFiles(fullPath));
-    } else if (file.endsWith(FILE_PATTERN)) {
-      arrayOfFiles.push(fullPath);
-    }
-  });
-
-  return arrayOfFiles;
-}
-
-/**
- * Filters files that contain at least one of the specified regex patterns.
- * @param {string[]} files - List of files to check.
- * @returns {string[]} - Files that contain at least one of the specified patterns.
- */
-function findFilesWithPattern(files) {
-  return files.filter((file) => {
-    const content = fs.readFileSync(file, 'utf8');
-    return SEARCH_PATTERNS.some((pattern) => pattern.test(content));
-  });
-}
-
-/**
- * Generates an import file containing imports for all found files.
- * @param {string[]} files - List of relevant files.
- * @returns {string} - Generated import code.
- */
-function generateImports(files) {
-  return files.map((file) => `import '${file.replace(/\\/g, '/')}';`).join('\n') + '\n';
-}
-
-/**
- * Main function that executes the script.
- */
-function main() {
-  try {
-    const srcDir = path.resolve(process.cwd(), argv.src);
-    const outputFile = path.resolve(process.cwd(), argv.output);
-
-    if (!fs.existsSync(srcDir)) {
-      console.error(`❌ Error: The directory '${srcDir}' does not exist.`);
-      process.exit(1);
-    }
-
-    const allFiles = getAllFiles(srcDir);
-    const filesWithPattern = findFilesWithPattern(allFiles);
-
-    if (filesWithPattern.length === 0) {
-      console.log(`ℹ️ No ${FILE_PATTERN} files found matching the specified decorator patterns.`);
-      return;
-    }
-
-    const importContent = generateImports(filesWithPattern);
-    fs.writeFileSync(outputFile, importContent);
-
-    console.log(`✅ Imports successfully generated: ${outputFile}`);
-  } catch (error) {
-    console.error('❌ An error occurred:', error.message);
-    process.exit(1);
-  }
-}
-
-main();

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "ts-injex",
-  "version": "0.0.9",
+  "version": "0.1.0-alpha",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "ts-injex",
-      "version": "0.0.9",
+      "version": "0.1.0-alpha",
       "license": "MIT",
       "dependencies": {
         "eslint-plugin-prettier": "^5.2.1",
@@ -5958,6 +5958,11 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-18.3.1.tgz",
       "integrity": "sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg=="
     },
+    "node_modules/reflect-metadata": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.2.2.tgz",
+      "integrity": "sha512-urBwgfrvVP/eAyXx4hluJivBKzuEbSQs9rKWCrCkbSxNv8mxPcUZKeuoF3Uy4mJl3Lwprp6yy5/39VWigZ4K6Q=="
+    },
     "node_modules/regexp.prototype.flags": {
       "version": "1.5.2",
       "resolved": "https://registry.npmjs.org/regexp.prototype.flags/-/regexp.prototype.flags-1.5.2.tgz",

package.json

@@ -1,13 +1,10 @@
 {
   "name": "ts-injex",
-  "version": "0.3.0",
+  "version": "0.1.0-alpha",
   "description": "Simple boilerplate code free dependency injection system for TypeScript.",
   "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
-  "bin": {
-    "tsinjex-generate": "./bin/generate-imports.cjs"
-  },
   "scripts": {
     "prepare": "npm run build",
     "build": "npm run build:tsc",
@@ -63,4 +60,4 @@
     "LICENSE",
     "package.json"
   ]
-}
+}

src/__tests__/Decorators.spec.ts

@@ -1,9 +1,9 @@
 /* istanbul ignore file */
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import { Inject } from 'src/decorators/Inject';
-import { DependencyResolutionError } from 'src/interfaces/Exceptions';
-import { ForceConstructor } from 'src/types/GenericContructor';
+import { DependencyResolutionError } from '../interfaces/Exceptions';
 import { ITSinjex_, ITSinjex } from '../interfaces/ITSinjex';
+import { ForceConstructor } from '../types/GenericContructor';
 
 /**
  * Test the Inject decorator.
@@ -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);
+        });
     });
 }
 
@@ -282,7 +318,6 @@ export function test_RegisterInstanceDecorator(
     Container: ITSinjex_,
     // eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
     registerInstance: Function,
-    mode: 'instance' | 'standalone' = 'standalone',
 ): void {
     describe('RegisterInstance Decorator Tests', () => {
         let container: ITSinjex;
@@ -296,10 +331,7 @@ export function test_RegisterInstanceDecorator(
         });
 
         it('should register an instance of a dependency', () => {
-            @registerInstance(
-                'InstanceIdentifier',
-                mode === 'instance' ? 'instance' : undefined,
-            )
+            @registerInstance('InstanceIdentifier')
             class TestClass {
                 private readonly _dependency!: any;
 
@@ -315,6 +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',
@@ -341,10 +390,7 @@ export function test_RegisterInstanceDecorator(
         });
 
         it('should register an instance of a dependency and get it on set', () => {
-            @registerInstance(
-                'InstanceIdentifier',
-                mode === 'instance' ? 'instance' : undefined,
-            )
+            @registerInstance('InstanceIdentifier')
             class TestClass {
                 private readonly _dependency!: any;
 

src/__tests__/Decorators.test.ts

@@ -1,4 +1,3 @@
-/* eslint-disable deprecation/deprecation */
 import { TSinjex } from 'src/classes/TSinjex';
 import { Inject } from 'src/decorators/Inject';
 import { Register } from 'src/decorators/Register';
@@ -14,5 +13,3 @@ test_InjectDecorator(TSinjex, Inject);
 test_RegisterDecorator(TSinjex, Register);
 
 test_RegisterInstanceDecorator(TSinjex, RegisterInstance);
-
-test_RegisterInstanceDecorator(TSinjex, Register, 'instance');

src/decorators/Inject.ts

@@ -1,26 +1,27 @@
+import { TSinjex } from '../classes/TSinjex';
 import {
     DependencyResolutionError,
+    IdentifierRequiredError,
     InitializationError,
     InjectorError,
     NoInstantiationMethodError,
-} from 'src/interfaces/Exceptions';
-import { TSinjex } from '../classes/TSinjex';
+} from '../interfaces/Exceptions';
 import { Identifier } from '../types/Identifier';
 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 U The type of the property to be injected.
- * @param identifier The identifier used to resolve the class in the DI container.
- * @see {@link Identifier} for more information on identifiers.
- * @param init Optional an initializer function to transform the dependency before injection
+ * @template TargetType The type of the class to inject the dependency into.
+ * @template DependencyType The type of the dependency to be injected.
+ * @template PropertyType The type of the property to be injected.
+ * @param identifier The {@link Identifier|identifier} used to resolve the dependencie in the DI container or the property name if not provided.
+ * @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.
@@ -40,71 +41,83 @@ import { InitDelegate } from '../types/InitDelegate';
  * }
  * ```
  */
-export function Inject<T, U>(
-    identifier: Identifier,
-    init?: InitDelegate<T, U> | true,
+export function Inject<TargetType, DependencyType, PropertyType>(
+    identifier?: Identifier,
+    init?: InitDelegate<DependencyType, PropertyType> | true,
     necessary = true,
 ) {
-    return function (target: unknown, propertyKey: string | symbol): void {
+    return function (
+        constructor: undefined,
+        context: ClassFieldDecoratorContext<TargetType>,
+    ): (
+        this: TargetType,
+        initialValue: PropertyType | undefined,
+    ) => PropertyType {
+        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 => {
-            return TSinjex.getInstance().resolve<T>(identifier, necessary);
+        const resolve = (): DependencyType | undefined => {
+            return TSinjex.getInstance().resolve<DependencyType>(
+                _identifier,
+                necessary,
+            );
         };
 
-        Object.defineProperty(target, propertyKey, {
-            get() {
-                let instance: T | U | undefined;
+        return function (
+            this: TargetType,
+            initialValue: PropertyType | undefined,
+        ): PropertyType {
+            let instance: DependencyType | PropertyType | undefined;
 
-                const dependency: T | undefined = tryAndCatch(
-                    () => resolve(),
-                    necessary,
-                    identifier,
-                    DependencyResolutionError,
-                );
+            const dependency: DependencyType | undefined = tryAndCatch(
+                () => resolve(),
+                necessary,
+                _identifier,
+                DependencyResolutionError,
+            );
 
-                if (dependency != null) {
-                    const initFunction: (() => U) | undefined =
-                        typeof init === 'function' && dependency != null
-                            ? (): U => init(dependency)
-                            : init === true && hasConstructor(dependency)
-                              ? (): U => new dependency() as U
-                              : undefined;
+            if (dependency != null) {
+                const initFunction: (() => PropertyType) | undefined =
+                    typeof init === 'function' && dependency != null
+                        ? (): PropertyType => init(dependency)
+                        : init === true && hasConstructor(dependency)
+                          ? (): PropertyType => new dependency() as PropertyType
+                          : undefined;
 
-                    if (init == null) instance = dependency;
-                    else if (initFunction != null)
-                        instance = tryAndCatch(
-                            initFunction,
-                            necessary,
-                            identifier,
-                            InitializationError,
-                        );
-                    else if (necessary)
-                        throw new NoInstantiationMethodError(identifier);
-                } else if (necessary)
-                    throw new DependencyResolutionError(identifier);
+                if (init == null) instance = dependency;
+                else if (initFunction != null)
+                    instance = tryAndCatch(
+                        initFunction,
+                        necessary,
+                        _identifier,
+                        InitializationError,
+                    );
+                else if (necessary)
+                    throw new NoInstantiationMethodError(_identifier);
+            } else if (necessary)
+                throw new DependencyResolutionError(_identifier);
 
-                /**
-                 * Replace itself with the resolved dependency
-                 * for performance reasons.
-                 */
-                Object.defineProperty(this, propertyKey, {
-                    value: instance,
-                    writable: false,
-                    enumerable: false,
-                    configurable: false,
-                });
-
-                return instance;
-            },
             /**
-             * Make the property configurable to allow replacing it
+             * Replace itself with the resolved dependency
+             * for performance reasons.
              */
-            configurable: true,
-        });
+            Object.defineProperty(this, context.name, {
+                value: instance,
+                writable: false,
+                enumerable: false,
+                configurable: false,
+            });
+
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any
+            return instance as any;
+        };
     };
 }
 

src/decorators/Register.ts

@@ -1,142 +1,14 @@
-import { InitDelegate } from 'src/types/InitDelegate';
 import { TSinjex } from '../classes/TSinjex';
+import { IdentifierRequiredError } from '../interfaces/Exceptions';
 import { Identifier } from '../types/Identifier';
 
-//#region Overloads
-
 /**
  * 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.
- * @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.
- * @returns The decorator function to be applied on the class.
- * @example
- * ```ts
- * \@Register('MyClassIdentifier')
- * class MyClass {
- *   // ...
- * }
- * ```
- * @example
- * ```ts
- * \@Register('MyClassIdentifier', true)
- * class MyClass {
- *   // ...
- * }
- * ```
- */
-export function Register<
-    TargetType extends new (...args: unknown[]) => InstanceType<TargetType>,
->(
-    identifier: Identifier,
-    deprecated?: boolean,
-): (constructor: TargetType, ...args: unknown[]) => void;
-
-/**
- * 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.
- * @see {@link Identifier} for more information on identifiers.
- * @param shouldRegister Set to 'instance' to register the instance in the DI container
- * with an empty constructor.
- * @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.
- * @example
- * ```ts
- * \@RegisterInstance('MyClassInstanceIdentifier', 'instance')
- * class MyClass {
- *   // ...
- * }
- * ```
- * @example
- * ```ts
- * \@RegisterInstance('MyClassInstanceIdentifier', 'instance', true)
- * class MyClass {
- *   // ...
- * }
- * ```
- */
-export function Register<
-    TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
->(
-    identifier: Identifier,
-    shouldRegister: 'instance',
-    deprecated?: boolean,
-): (constructor: TargetType, ...args: unknown[]) => void;
-
-/**
- * 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.
- * @see {@link Identifier} for more information on identifiers.
- * @param init An optional initializer function which get the constructor of the class
- * as input and returns an instance of the class.
- * @param deprecated If true, the dependency is deprecated and a warning
- * is logged only once upon the first resolution of the dependency.
- * @see {@link InitDelegate} for more information on initializer functions.
- * @returns The decorator function to be applied on the class.
- * @example
- * ```ts
- * \@RegisterInstance('MyClassInstanceIdentifier', (constructor) => new constructor())
- * class MyClass {
- *   // ...
- * }
- * ```
- * @example
- * ```ts
- * \@RegisterInstance('MyClassInstanceIdentifier', (constructor) => new constructor(), true)
- * class MyClass {
- *   // ...
- * }
- * ```
- */
-export function Register<
-    TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
->(
-    identifier: Identifier,
-    init?: InitDelegate<
-        TargetType & { new (..._args: unknown[]): InstanceType<TargetType> },
-        InstanceType<TargetType>
-    >,
-    deprecated?: boolean,
-): (constructor: TargetType, ...args: unknown[]) => void;
-
-//#endregion Overloads
-
-// eslint-disable-next-line jsdoc/require-jsdoc
-export function Register<
-    TargetType extends new (...args: unknown[]) => InstanceType<TargetType>,
->(
-    identifier: Identifier,
-    arg1?:
-        | undefined
-        | boolean
-        | InitDelegate<TargetType, InstanceType<TargetType>>
-        | 'instance',
-    arg2?: boolean,
-): (constructor: TargetType, ...args: unknown[]) => void {
-    const deprecated = typeof arg1 === 'boolean' ? arg1 : arg2;
-    const init = typeof arg1 === 'function' ? arg1 : undefined;
-    const shouldRegisterInstance = arg1 === 'instance';
-
-    if (init == undefined && shouldRegisterInstance !== true) {
-        return _register(identifier, deprecated);
-    } else {
-        return _registerInstance(identifier, init, deprecated);
-    }
-}
-
-/**
- * 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.
- * @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 identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
+ * @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')
@@ -145,122 +17,18 @@ export function Register<
  * }
  * ```
  */
-function _register<
+export function Register<
     TargetType extends new (...args: unknown[]) => InstanceType<TargetType>,
->(identifier: Identifier, deprecated?: boolean) {
-    return function (constructor: TargetType, ...args: unknown[]): void {
-        // Get the instance of the DI container
-        const diContainer = TSinjex.getInstance();
+>(identifier?: Identifier, deprecated?: boolean) {
+    return function (
+        constructor: TargetType,
+        context: ClassDecoratorContext<TargetType>,
+    ) {
+        const _identifier = identifier ?? context.name;
 
-        // Register the class in the DI container
-        diContainer.register(identifier, constructor, deprecated);
+        if (_identifier == null) throw new IdentifierRequiredError();
+
+        const diContainer = TSinjex.getInstance();
+        diContainer.register(_identifier, constructor, deprecated);
     };
 }
-
-/**
- * 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.
- * @see {@link Identifier} for more information on identifiers.
- * @param init An optional initializer function which get the constructor of the class
- * as input and returns an instance of the class.
- * @param deprecated If true, the dependency is deprecated and a warning
- * is logged only once upon the first resolution of the dependency.
- * @see {@link InitDelegate} for more information on initializer functions.
- * @returns The decorator function to be applied on the class.
- * @example
- * ```ts
- * \@RegisterInstance('MyClassInstanceIdentifier', (constructor) => new constructor())
- * class MyClass {
- *   // ...
- * }
- * ```
- */
-function _registerInstance<
-    TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
->(
-    identifier: Identifier,
-    init?: InitDelegate<
-        TargetType & { new (..._args: unknown[]): InstanceType<TargetType> },
-        InstanceType<TargetType>
-    >,
-    deprecated?: boolean,
-) {
-    return function (constructor: TargetType, ...args: unknown[]): void {
-        // Get the instance of the DI container
-        const diContainer = TSinjex.getInstance();
-        let instance: InstanceType<TargetType>;
-
-        // Create a proxy to instantiate the class when needed (Lazy Initialization)
-        let lazyProxy: unknown = new Proxy(
-            {},
-            {
-                get(target, prop, receiver) {
-                    ({ instance, lazyProxy } = initializeInstance<TargetType>(
-                        instance,
-                        init,
-                        constructor,
-                        args,
-                        lazyProxy,
-                    ));
-
-                    // Return the requested property of the instance
-                    return instance[prop as keyof InstanceType<TargetType>];
-                },
-                set(target, prop, value, receiver) {
-                    ({ instance, lazyProxy } = initializeInstance<TargetType>(
-                        instance,
-                        init,
-                        constructor,
-                        args,
-                        lazyProxy,
-                    ));
-
-                    // Set the requested property of the instance
-                    return (instance[prop as keyof InstanceType<TargetType>] =
-                        value);
-                },
-            },
-        );
-
-        // Register the lazy proxy in the DI container
-        diContainer.register(identifier, lazyProxy, deprecated);
-    };
-}
-
-/**
- * Initializes the instance of the class.
- * @template TargetType The type of the class whose instance is to be initialized.
- * @param instance The instance of the class to be initialized.
- * @param init The optional initializer function to initialize the instance.
- * @param constructor The constructor of the class.
- * @param args The arguments to be passed to the constructor of the class.
- * @param lazyProxy The lazy proxy to instantiate the class when needed.
- * @returns The initialized instance and the lazy proxy.
- */
-function initializeInstance<
-    TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
->(
-    instance: InstanceType<TargetType>,
-    init:
-        | InitDelegate<
-              TargetType &
-                  (new (..._args: unknown[]) => InstanceType<TargetType>),
-              InstanceType<TargetType>
-          >
-        | undefined,
-    constructor: TargetType,
-    args: unknown[],
-    lazyProxy: unknown,
-): { instance: InstanceType<TargetType>; lazyProxy: unknown } {
-    if (instance == null) {
-        if (init) {
-            instance = init(constructor);
-        } else {
-            instance = new constructor(...args);
-        }
-    }
-    lazyProxy = instance;
-
-    return { instance, lazyProxy };
-}

src/decorators/RegisterInstance.ts

@@ -1,18 +1,16 @@
-import { Register } from './Register';
+import { TSinjex } from '../classes/TSinjex';
+import { IdentifierRequiredError } from '../interfaces/Exceptions';
 import { Identifier } from '../types/Identifier';
 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.
- * @see {@link Identifier} for more information on identifiers.
- * @param init An optional initializer function which get the constructor of the class
+ * @param identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
+ * @param init An optional initializer {@link InitDelegate|function} which get the constructor of the class
  * as input and returns an instance of the class.
- * @param deprecated If true, the dependency is deprecated and a warning
- * is logged only once upon the first resolution of the dependency.
- * @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())
@@ -20,20 +18,63 @@ import { InitDelegate } from '../types/InitDelegate';
  *   // ...
  * }
  * ```
- * @deprecated Use {@link Register} instead. This decorator already uses the {@link Register} decorator internally.
  */
 export function RegisterInstance<
     TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
 >(
-    identifier: Identifier,
+    identifier?: Identifier,
     init?: InitDelegate<
         TargetType & { new (..._args: unknown[]): InstanceType<TargetType> },
         InstanceType<TargetType>
     >,
-    deprecated?: boolean,
-): (constructor: TargetType, ...args: unknown[]) => void {
-    const initDelegate = typeof init === 'function' ? init : undefined;
+) {
+    return function (
+        constructor: TargetType,
+        context: ClassDecoratorContext<TargetType>,
+    ): void {
+        const _identifier = identifier ?? context.name;
 
-    if (initDelegate) return Register(identifier, initDelegate, deprecated);
-    else return Register(identifier, 'instance', deprecated);
+        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)
+        const lazyProxy: unknown = new Proxy(
+            {},
+            {
+                get(_target, prop, _receiver) {
+                    getAndRegisterInstance();
+
+                    // Return the requested property of the instance
+                    return instance[prop as keyof InstanceType<TargetType>];
+                },
+                set(_target, prop, value, _receiver) {
+                    getAndRegisterInstance();
+
+                    // Set the requested property of the instance
+                    return (instance[prop as keyof InstanceType<TargetType>] =
+                        value);
+                },
+            },
+        );
+
+        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": [