gr.uoa.di.driver.dao

Interface GenericDAO<T>

Type Parameters:

T - The type of elements managed by this dao.

All Known Subinterfaces:

SecurityProfileDao

All Known Implementing Classes:

GenericISDao

public interface GenericDAO<T>

A class used to access a data source and perform basic actions.

Author:

antleb@di.uoa.gr

Method Summary

Modifier and Type	Method and Description
void	delete(T entity) Deletes the given element.
List<T>	getAll() Returns all elements.
T	getById(String id) Returns the element with the given id.
T	getUniqueResult(eu.dnetlib.domain.SearchCriteria criteria) Performs a search and returns the unique result.
T	save(T entity) Saves the given element.
List<T>	search(eu.dnetlib.domain.SearchCriteria criteria) Returns all elements that comply with the restrictions described by the criteria object.

Method Detail

getById

T getById(String id)
   throws DAOException

Returns the element with the given id.

Parameters:

id - The element's id.

Returns:

the element with the given id.

Throws:

DAOException

save

T save(T entity)
throws DAOException

Saves the given element.

Parameters:

entity - The element to save.

Returns:

The same element with its id changed

Throws:

DAOException

delete

void delete(T entity)
     throws DAOException

Deletes the given element.

Parameters:

entity - The element to delete.

Throws:

DAOException

getAll

List<T> getAll()
        throws DAOException

Returns all elements.

Returns:

A ResultSetIterator with all of the elements.

Throws:

DAOException

search

List<T> search(eu.dnetlib.domain.SearchCriteria criteria)
        throws DAOException

Returns all elements that comply with the restrictions described by the criteria object.

Parameters:

criteria - The searh criteria.

Returns:

A ResultSetIterator with the results of the query.

Throws:

DAOException

getUniqueResult

T getUniqueResult(eu.dnetlib.domain.SearchCriteria criteria)
           throws DAOException

Performs a search and returns the unique result. Throws a DAOException if there were more than one results.

Parameters:

criteria - the search criteria;

Returns:

the unique result of this query.

Throws:

DAOException - If there was a problem in the search or there were more than one results in the query.