angular-cn/public/docs/js/latest/api/di/DependencyMetadata-class.jade

p.location-badge.
  exported from <a href='../di'>angular2/di</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.33/modules/angular2/src/di/metadata.ts#L34-L65">angular2/src/di/metadata.ts (line 34)</a>

:markdown
  `DependencyMetadata is used by the framework to extend DI.
  
  Only metadata implementing `DependencyMetadata` are added to the list of dependency
  properties.
  
  For example:
  
  ```
  class Exclude extends DependencyMetadata {}
  class NotDependencyProperty {}
  
  class AComponent {
    constructor(@Exclude @NotDependencyProperty aService:AService) {}
  }
  ```
  
  will create the following dependency:
  
  ```
  new Dependency(Key.get(AService), [new Exclude()])
  ```
  
  The framework can use `new Exclude()` to handle the `aService` dependency
  in a specific way.
  
  

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  h2 Annotations
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    h3.annotation CONST
    pre.prettyprint
      code.
        @CONST()


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  h2 Members
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    h3 token

    
    :markdown