Package com.rosivanyshyn.db.dao.implMySQL

Class GenericDAOImpl<T>

java.lang.Object

com.rosivanyshyn.db.dao.implMySQL.GenericDAOImpl<T>

Type Parameters:

T - Entity

All Implemented Interfaces:

GenericDAO<T>

Direct Known Subclasses:

AccountDAOImpl, ApartmentDAOImpl, BookingDAOImpl, OrderDAOImpl, ResponseToOrderDAOImpl

public abstract class GenericDAOImpl<T>
extends Object
implements GenericDAO<T>

Generic DAO interface implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static interface	GenericDAOImpl.DBStatementOperations<T>	Substitute Values in DB Queries through statement
protected static interface	GenericDAOImpl.ExtractEntity<T>	Extract entity from ResultSet in JavaBean
protected static interface	GenericDAOImpl.SetGeneratedValuesToEntity<T>	Receive getGeneratedKeys from preparedStatement and update current entity for which them was generated.

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	className
protected static final org.apache.log4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
GenericDAOImpl()

Method Summary

Modifier and Type	Method	Description
int	countRowsInLastQuery(Connection con)	Count the number of rows in the last query Last query should have SQL_CALC_FOUND_ROWS part!!!
Boolean	delete(Connection con, Long id)	Delete object from respective table by id.
T	get(Connection con, Long id)	Get object from respective table by id.
ArrayList<T>	getAll(Connection con)	Get all objects from respective table.
T	getByField(Connection con, String field, Object value)	Find entity from respective table by field and value.
ArrayList<T>	getFew(Connection con, int start, int total)	Get few objects from respective table.
ArrayList<T>	getWithDynamicQuery(Connection con, String secondQueryPart, Object... fields)	Get objects from respective table by using query builder string part
Boolean	insert(Connection con, T object)	Add specific object to respective table.
Boolean	update(Connection con, T object)	Update object in respective table.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOG

protected static final org.apache.log4j.Logger LOG

className

protected final String className

Constructor Details

GenericDAOImpl

public GenericDAOImpl()

Method Details

insert

public Boolean insert(Connection con,
 T object)

Description copied from interface: GenericDAO

Add specific object to respective table.

Specified by:

insert in interface GenericDAO<T>

Parameters:

con - connection to database

object - object

Returns:

Boolean operation result

get

public T get(Connection con,
 Long id)

Description copied from interface: GenericDAO

Get object from respective table by id.

Specified by:

get in interface GenericDAO<T>

Parameters:

con - connection to database

id - object id

Returns:

T object result field

getAll

public ArrayList<T> getAll(Connection con)

Description copied from interface: GenericDAO

Get all objects from respective table.

Specified by:

getAll in interface GenericDAO<T>

Parameters:

con - connection to database

Returns:

ArrayList result array

getFew

public ArrayList<T> getFew(Connection con,
 int start,
 int total)

Description copied from interface: GenericDAO

Get few objects from respective table.
Example - start 15, total 50, return records from 15 to 65 (Not from 15 to 50!!!)

Specified by:

getFew in interface GenericDAO<T>

Parameters:

con - connection to database

start - which record to start sampling from

total - records count to get

Returns:

ArrayList result array

getByField

public T getByField(Connection con,
 String field,
 Object value)

Description copied from interface: GenericDAO

Find entity from respective table by field and value.

Specified by:

getByField in interface GenericDAO<T>

Parameters:

con - connection to database

field - user field. Doesn`t support foreign keys!!!

value - user value

Returns:

T field

getWithDynamicQuery

public ArrayList<T> getWithDynamicQuery(Connection con,
 String secondQueryPart,
 Object... fields)

Description copied from interface: GenericDAO

Get objects from respective table by using query builder string part

Specified by:

getWithDynamicQuery in interface GenericDAO<T>

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

public Boolean update(Connection con,
 T object)

Description copied from interface: GenericDAO

Update object in respective table.

Specified by:

update in interface GenericDAO<T>

Parameters:

con - connection to database

object - object to update

Returns:

Boolean operation result

delete

public Boolean delete(Connection con,
 Long id)

Description copied from interface: GenericDAO

Delete object from respective table by id.

Specified by:

delete in interface GenericDAO<T>

Parameters:

con - connection to database

id - object id

Returns:

Boolean operation result

countRowsInLastQuery

public int countRowsInLastQuery(Connection con)

Description copied from interface: GenericDAO

Count the number of rows in the last query
Last query should have SQL_CALC_FOUND_ROWS part!!!

Specified by:

countRowsInLastQuery in interface GenericDAO<T>

Parameters:

con - connection to database

Returns:

number of rows