added Container.has method

Author: Umed Khudoiberdiev

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.6.1
+
+* added `Container.has` method
+
 ## 0.6.0
 
 * added multiple containers support

package.json

@@ -1,6 +1,6 @@
 {
   "name": "typedi",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "Dependency injection for TypeScript",
   "license": "MIT",
   "readmeFilename": "README.md",

src/Container.ts

@@ -49,6 +49,32 @@ export class Container {
         return container;
     }
 
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    static has<T>(type: ObjectType<T>): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    static has<T>(id: string): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    static has<T>(id: Token<T>): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    static has<T>(identifier: ServiceIdentifier): boolean {
+        return this.globalInstance.has(identifier as any);
+    }
+
     /**
      * Retrieves the service with given name or type from the service container.
      * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.

src/ContainerInstance.ts

@@ -42,6 +42,32 @@ export class ContainerInstance {
     // Public Methods
     // -------------------------------------------------------------------------
 
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    has<T>(type: ObjectType<T>): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    has<T>(id: string): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    has<T>(id: Token<T>): boolean;
+
+    /**
+     * Checks if the service with given name or type is registered service container.
+     * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.
+     */
+    has<T>(identifier: ServiceIdentifier): boolean {
+        return !!this.findService(identifier);
+    }
+
     /**
      * Retrieves the service with given name or type from the service container.
      * Optionally, parameters can be passed in case if instance is initialized in the container for the first time.