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

public class DaoHelper<TT,KT>
extends Object

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 one of the use cases is for EJB Stateless bean to inherit from this class.

Author:

lprimak

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DaoHelper.DaoHelperBuilder<TT,KT,C extends DaoHelper<TT,KT>,B extends DaoHelper.DaoHelperBuilder<TT,KT,C,B>>
static class	DaoHelper.Parameters<TT>

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DaoHelper(DaoHelper.DaoHelperBuilder<TT,KT,?,?> b)
	DaoHelper(@NonNull Supplier<javax.persistence.EntityManager> entityManagerSupplier, @NonNull Class<TT> entityClass)

Method Summary

Modifier and Type	Method	Description
static <TT, KT> DaoHelper.DaoHelperBuilder<TT,KT,?,?>	builder()
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
@NonNull Class<TT>	getEntityClass()	entity class
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

protected DaoHelper(DaoHelper.DaoHelperBuilder<TT,KT,?,?> b)

DaoHelper

@ConstructorProperties({"entityManagerSupplier","entityClass"})
public DaoHelper(@NonNull
 @NonNull Supplier<javax.persistence.EntityManager> entityManagerSupplier,
 @NonNull
 @NonNull Class<TT> entityClass)

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)

builder

public static <TT,
KT>
DaoHelper.DaoHelperBuilder<TT,KT,?,?> builder()

getEntityClass

@NonNull
public @NonNull Class<TT> getEntityClass()

entity class