# All files / common/decorators/core component.decorator.ts

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     import * as deprecate from 'deprecate';
    import * as uuid from 'uuid/v4';

    /**
     * Defines the injectable class. This class can inject dependencies through constructor.
     * Those dependencies have to belong to the same module.
     */
    export function Injectable(): ClassDecorator {
      return (target: object) => {};
    }

    /**
     * @deprecated
     * Defines the Component. The component can inject dependencies through constructor.
     * Those dependencies have to belong to the same module.
     */
    export function Component(): ClassDecorator {
      deprecate(
        'The @Component() decorator is deprecated and will be removed within next major release. Use @Injectable() instead.',
      );
      return (target: object) => {};
    }

    /**
     * @deprecated
     * Defines the Pipe. The Pipe should implement the `PipeTransform` interface.
     */
    export function Pipe(): ClassDecorator {
      deprecate(
        'The @Pipe() decorator is deprecated and will be removed within next major release. Use @Injectable() instead.',
      );
      return (target: object) => {};
    }

    /**
     * @deprecated
     * Defines the Guard. The Guard should implement the `CanActivate` interface.
     */
    export function Guard(): ClassDecorator {
      deprecate(
        'The @Guard() decorator is deprecated and will be removed within next major release. Use @Injectable() instead.',
      );
      return (target: object) => {};
    }

    /**
     * @deprecated
     * Defines the Middleware. The Middleware should implement the `NestMiddleware` interface.
     */
    export function Middleware(): ClassDecorator {
      deprecate(
        'The @Middleware() decorator is deprecated and will be removed within next major release. Use @Injectable() instead.',
      );
      return (target: object) => {};
    }

    /**
     * @deprecated
     * Defines the Interceptor. The Interceptor should implement `HttpInterceptor`, `RpcInterceptor` or `WsInterceptor` interface.
     */
    export function Interceptor(): ClassDecorator {
      deprecate(
        'The @Interceptor() decorator is deprecated and will be removed within next major release. Use @Injectable() instead.',
      );
      return (target: object) => {};
    }

    export function mixin(mixinClass) {
      Object.defineProperty(mixinClass, 'name', {
        value: uuid(),
      });
      Injectable()(mixinClass);
      return mixinClass;
    }