Availability of Data Access Object classes

In most cases, Adapter classes are sufficient to perform database related operations. However, it's possible that there are entities related to other entities through foreign key associations and, in such cases, it is desirable to provide Data Access Classes to facilitate fetching data from multiple entities. For instance, for the User Business Object Type, at least one Data Access Object class is required:

UserDAO, to fetch related information for a user from to-do and note items

DAO Class name	Operation Name	Description
UserDAO	searchAllUsers	Searches all the users in the system
	searchAllToDos	Search all the related to-do items for a user
	searchAllToDoLinks	Search all the related to-do item links for a user
	searchAllNotes	Search all the related note items for a user
	searchAllNoteLinks	Search all the related note item links for a user
	searchAllCategories	Search all the related categories for notes that are associated with a user