# All Classes

- All Classes Interface Summary Class Summary Exception Summary
  Class | Description
  --- | ---
  DefaultYellowpagesService | This is the Yellowpages Service layer to manage the yellow page application.
  GroupDAO |
  GroupEventListener | A listener of events coming from the changes operating on the user groups.
  TopicDetail | This object contains elements which are displayed in a yellowpages Topic
  UserCompleteContact | This object contains elements which are displayed in a yellowpages Topic
  UserContact | This object contains elements which are displayed in a yellowpages Topic
  YellowpagesComponentSettings | It gathers all the settings and i18n relative to the Yellowpages component.
  YellowpagesException |
  YellowPagesGroupDetail |
  YellowpagesInstancePostConstruction | Once an instance of the YellowPages application is created, creates for it an entry with the NodeService to gathers the contacts and within it two special areas: the bin and the declassified.
  YellowpagesRuntimeException | Class declaration
  YellowpagesService |
  YellowpagesStatistics |