Identifies the delegate injection point of a decorator. May be applied to a field, bean constructor parameter or initializer method parameter of a decorator bean class.

@Decorator 
class TimestampLogger implements Logger { 
   @Inject @Delegate @Any Logger logger; 
   ... 
}

@Decorator 
class TimestampLogger implements Logger { 
   private Logger logger;

   @Inject
   public TimestampLogger(@Delegate @Debug Logger logger) { 
      this.logger=logger; 
   } 
   ... 
}

A decorator must have exactly one delegate injection point. The delegate injection point must be an injected field, initializer method parameter or bean constructor method parameter.

The container injects a delegate object to the delegate injection point. The delegate object implements the delegate type and delegates method invocations along the decorator stack. When the container calls a decorator during business method interception, the decorator may invoke any method of the delegate object. If a decorator invokes the delegate object at any other time, the invoked method throws an java.lang.IllegalStateException.

@Decorator 
class TimestampLogger implements Logger { 
   @Inject @Delegate @Any Logger logger; 

   void log(String message) {
      logger.log( timestamp() + ": " + message );
   }
   ...
}

CDI Lite implementations are not required to provide support for decorators.