Package com.rosivanyshyn.db.dao

Interface GenericDAO<T>

Type Parameters:
T - – the type of entities
All Known Subinterfaces:
AccountDAO, ApartmentDAO, BookingDAO, OrderDAO, ResponseToOrderDAO
All Known Implementing Classes:
AccountDAOImpl, ApartmentDAOImpl, BookingDAOImpl, GenericDAOImpl, OrderDAOImpl, ResponseToOrderDAOImpl
public interface GenericDAO<T>
Generic DAO interface. Implement methods which are generic for all others DAO

  • Method Details

    • insert

      Boolean insert(Connection con, T object)
      Add specific object to respective table.
      Parameters:
      con - connection to database
      object - object
      Returns:
      Boolean operation result

    • get

      T get(Connection con, Long id)
      Get object from respective table by id.
      Parameters:
      con - connection to database
      id - object id
      Returns:
      T object result field

    • getAll

      ArrayList<T> getAll(Connection con)
      Get all objects from respective table.
      Parameters:
      con - connection to database
      Returns:
      ArrayList result array

    • getFew

      ArrayList<T> getFew(Connection con, int start, int total)
      Get few objects from respective table.
      Example - start 15, total 50, return records from 15 to 65 (Not from 15 to 50!!!)
      Parameters:
      con - connection to database
      start - which record to start sampling from
      total - records count to get
      Returns:
      ArrayList result array

    • getByField

      T getByField(Connection con, String field, Object value)
      Find entity from respective table by field and value.
      Parameters:
      con - connection to database
      field - user field. Doesn`t support foreign keys!!!
      value - user value
      Returns:
      T field

    • getWithDynamicQuery

      ArrayList<T> getWithDynamicQuery(Connection con, String secondQueryPart, Object... fields)
      Get objects from respective table by using query builder string part
      Parameters:
      con - connection to database
      secondQueryPart - query builder string part
      fields - fields for insertion in query builder string part statement
      Returns:
      ArrayList result array

    • update

      Boolean update(Connection con, T object)
      Update object in respective table.
      Parameters:
      con - connection to database
      object - object to update
      Returns:
      Boolean operation result

    • delete

      Boolean delete(Connection con, Long id)
      Delete object from respective table by id.
      Parameters:
      con - connection to database
      id - object id
      Returns:
      Boolean operation result

    • countRowsInLastQuery

      int countRowsInLastQuery(Connection con)
      Count the number of rows in the last query
      Last query should have SQL_CALC_FOUND_ROWS part!!!
      Parameters:
      con - connection to database
      Returns:
      number of rows