public final Factory registerFactory ( Factory factory ) { if ( factory == null ) { throw new NullPointerException ( ) ; } try { factoryLock . acquireWrite ( ) ; factories . add ( 0 , factory ) ; clearCaches ( ) ; } finally { factoryLock . releaseWrite ( ) ; } notifyChanged ( ) ; return factory ; }
Register a Factory . Returns the factory if the service accepts the factory otherwise returns null . The default implementation accepts all factories .