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Generic DAO-Hibernate

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This provides GenericDAOImpl, an abstract class that implements all DAO (from the Generic DAO package) methods using Hibernate. Subclassing it, all your DAO implementations must do is to implement the specific database queries, not the common ones.

Additional GenericDAOImpl methods

This class has some useful methods:

  • static String toHqlOrderBy(SortCriterion... sortCriteria) Creates an HQL ORDER BY clause equivalent to an array of SortCriterion instances.
  • static void addSortCriteria(Criteria criteria, SortCriterion... sortCriteria) Adds an array of SortCriterions to a Criteria query.
  • SortCriterion[] getDefaultSortCriteria() (defined in ReadableDAO Defines the default sort criteria (the one used when no sort criteria is given). For example, the sorting criteria used by the findAll method is exactly the one defined by this method. Its implementation in GenericDAOImpl returns an empty array (no sort criteria is applied).
  • SessionFactory getSessionFactory() returns the org.hibernate.SessionFactory being used.
  • Session getSession() returns an org.hibernate.Session. This method must be used by all methods that need a Session. It returns getSessionFactory().getCurrentSession().

Dependencies

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