Package com.flowlogix.jeedao

Class DaoHelper<TT,KT>

java.lang.Object

com.flowlogix.jeedao.DaoHelper<TT,KT>

Type Parameters:

TT - Entity Type

KT - Primary Key Type

All Implemented Interfaces:

Serializable

public class DaoHelper<TT,KT>
extends Object
implements Serializable

Lightweight wrapper around common JPA methods This is the primary class in the com.flowlogix.jeedao package

Main value-add is ability to easily add hints and query criteria to findAll() and findRange(int, int) methods, as well as count() methods

Another differentiator is that this class doesn't require inheritance, although some use cases could inherit from InheritableDaoHelper class.

Author:

lprimak

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DaoHelper.Parameters<TT>

Constructor Summary

Constructors

Constructor	Description
DaoHelper()

Method Summary

Modifier and Type	Method	Description
QueryCriteria<TT>	buildQueryCriteria()
<RR> QueryCriteria<RR>	buildQueryCriteria(Class<RR> cls)
int	count()
int	count(DaoHelper.Parameters<TT> parms)
TypedNativeQuery	createNativeQuery(String sql, Class<?> resultClass)
TypedNativeQuery	createNativeQuery(String sql, String resultMapping)
List<TT>	findAll()
List<TT>	findAll(DaoHelper.Parameters<TT> parms)	find all with added criteria and hints
List<TT>	findRange(int min, int max)
List<TT>	findRange(int min, int max, DaoHelper.Parameters<TT> parms)	find range with added criteria and hints
javax.persistence.EntityManager	getEntityManager()

Methods inherited from class java.lang.Object

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

Constructor Details

DaoHelper

public DaoHelper()

Method Details

findAll

public List<TT> findAll()

findAll

public List<TT> findAll(DaoHelper.Parameters<TT> parms)

find all with added criteria and hints

Parameters:

parms -

Returns:

findRange

public List<TT> findRange(int min,
 int max)

findRange

public List<TT> findRange(int min,
 int max,
 DaoHelper.Parameters<TT> parms)

find range with added criteria and hints

Parameters:

min -

max -

parms -

Returns:

count

public int count()

count

public int count(DaoHelper.Parameters<TT> parms)

getEntityManager

public javax.persistence.EntityManager getEntityManager()

Returns:

entity manager

buildQueryCriteria

public QueryCriteria<TT> buildQueryCriteria()

buildQueryCriteria

public <RR> QueryCriteria<RR> buildQueryCriteria(Class<RR> cls)

createNativeQuery

public TypedNativeQuery createNativeQuery(String sql,
 Class<?> resultClass)

createNativeQuery

public TypedNativeQuery createNativeQuery(String sql,
 String resultMapping)