Package me.nickhanson.codeforge.persistence

Class GenericDao<T>

java.lang.Object

me.nickhanson.codeforge.persistence.GenericDao<T>

public class GenericDao<T>
extends Object

Generic, concrete data helper used by DAOs to perform common CRUD operations with Hibernate SessionFactory. This is intentionally not a Spring bean to match the class pattern used in the project.

Author:

Nick Hanson

Constructor Summary

Constructors

Constructor	Description
GenericDao(Class<T> type)

Method Summary

Modifier and Type	Method	Description
void	delete(T entity)	Delete the given entity.
List<T>	findByPropertyEqual(String property, Object value)	Find entities where a property equals a given value.
List<T>	getAll()	Get all entities of type T, ordered by ID ascending.
T	getById(Long id)	Get entity by its primary key ID.
void	saveOrUpdate(T entity)	Save or update the given entity.

Methods inherited from class java.lang.Object

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

Constructor Details

GenericDao

public GenericDao(Class<T> type)

Method Details

getById

public T getById(Long id)

Get entity by its primary key ID.

Parameters:

id - the primary key ID

Returns:

the entity instance or null if not found

getAll

public List<T> getAll()

Get all entities of type T, ordered by ID ascending.

Returns:

list of all entities

saveOrUpdate

public void saveOrUpdate(T entity)

Save or update the given entity.

Parameters:

entity - the entity to save or update

delete

public void delete(T entity)

Delete the given entity.

Parameters:

entity - the entity to delete

findByPropertyEqual

public List<T> findByPropertyEqual(String property,
 Object value)

Find entities where a property equals a given value.

Parameters:

property - the property name

value - the value to match

Returns:

list of matching entities