GenericHibernate4DAO (banda-serverbase 0.1.8 API)

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com.banda.serverbase.persistence
Class GenericHibernate4DAO<T,PK extends Serializable>

java.lang.Object
  com.banda.serverbase.persistence.GenericHibernate4DAO<T,PK>


Type Parameters:: T - a type variable; PK - the primary key for that type

All Implemented Interfaces:: GenericDAO<T,PK>

public class GenericHibernate4DAO<T,PK extends Serializable>
extends Object
implements GenericDAO<T,PK>
extends Object
implements GenericDAO<T,PK>

This class serves as the Base class for all other DAOs - namely to hold common CRUD methods that they might all use. You should only need to extend this class when your require custom CRUD logic.

Since:: 2012
Author:: © Peter Banda

Field Summary
`protected org.apache.commons.logging.Log`	`log` Log variable for all child classes.

Constructor Summary
`protected`	`GenericHibernate4DAO(Class<? extends T> persistentClass)` Constructor that takes in a class to see which type of entity to persist

Method Summary

void clear()
Clears session.

protected static



<T,PK extends Serializable> 


GenericHibernate4DAO<T,PK>

createDaoInstance(Class<T> clazz)
For Spring configuration purpose only.

void evict(T object)
Evicts given object from session.

boolean exists(PK id)
Checks for existence of an object with given key.

void flush()
Flushes session.

Collection<T> get(Collection<PK> ids)
Generic method to get objects based on class and identifiers.

T get(PK id)
Generic method to get an object based on class and identifier.

List<T> getAll()
Generic method used to get all objects of a particular type.

List<T> getByExample(T object)
Gets objects from the database that match given example.

T getByUniqueExample(T object)
Gets object from the database that match given example.

PK getKey(T object)
Generic method to get the identifier of a given object.

T getLast()
Generic method to get the last object.

PK getNextPK(PK id)
Get primary key larger than given one

PK getPreviousPK(PK id)
Get primary key smaller than given one

org.hibernate.SessionFactory getSessionFactory()

void remove(Collection<T> objects)
Generic method to delete a given object

void remove(PK id)
Generic method to delete an object with given id

void remove(T object)
Generic method to delete a given object





<C extends Collection<T>> 


C

save(C objects)
Generic method to save collection of objects - handles insert, update and remove.

T save(T object)
Generic method to save an object - handles insert, update and remove.

void setKey(T object, PK key)
Generic method to set the identifier for a given object.

void setSessionFactory(org.hibernate.SessionFactory sessionFactory)

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

log

protected final org.apache.commons.logging.Log log

Log variable for all child classes. Uses LogFactory.getLog(getClass()) from Commons Logging

Constructor Detail

GenericHibernate4DAO

protected GenericHibernate4DAO(Class<? extends T> persistentClass)

Constructor that takes in a class to see which type of entity to persist

Parameters:: persistentClass - the class type you'd like to persist; keyExtractor -

Method Detail

getAll

public List<T> getAll()

Generic method used to get all objects of a particular type.

Specified by:: getAll in interface GenericDAO<T,PK extends Serializable>

Returns:: List of populated objects