org.fryske_akademy.ejb

Class AbstractCrudService

java.lang.Object

org.fryske_akademy.ejb.AbstractCrudService

All Implemented Interfaces:

CrudReadService, CrudWriteService

Direct Known Subclasses:

AbstractCrudServiceEnvers

@DeclareRoles(value="editor")
public abstract class AbstractCrudService
extends Object
implements CrudReadService, CrudWriteService

This base class enables you to create minimal crud service beans. All you have to do is override, implement getEntityManager and add annotation @Stateless, @Local(CrudReadService.class, CrudWriteService.class).

Inject the crud interfaces using @Inject in your frontend (problems with inhertitance and @EJB).

This base class declares appropriate transactions and an EDITORROLE role to protect write operations.

A JpqlBuilderImpl is used for building where and order by clauses in dynamic queries, i.e. used in findDynamic(java.lang.Integer, java.lang.Integer, java.util.Map, java.util.List, java.lang.Class).

The JpqlBuilder is also used for setting parameter values.

Author:

eduard

Nested Class Summary

Nested classes/interfaces inherited from interface org.fryske_akademy.ejb.CrudReadService

CrudReadService.SORTORDER

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_PAGE_SIZE default page size (max results), used when no maximum is given.
static String	EDITORROLE

Constructor Summary

Constructors

Constructor and Description
AbstractCrudService()

Method Summary

Modifier and Type	Method and Description
int	count(String namedQuery, List<Param> params) Use in conjunction with CrudReadService.find(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class) or CrudReadService.findNative(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class).
int	countDynamic(List<Param> params, Class type)
<T extends Serializable> T	create(T t)
void	delete(Serializable t)
<T extends Serializable> T	find(Serializable id, Class<T> type)
<T extends Serializable> List<T>	find(String namedQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T extends Serializable> List<T>	findAll(Class<T> type)
<T extends Serializable> List<T>	findDynamic(Integer first, Integer pageSize, Map<String,CrudReadService.SORTORDER> sort, List<Param> params, Class<T> type)
<T extends Serializable> List<T>	findNative(String namedNativeQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T extends Serializable> T	findOne(String namedQuery, List<Param> params, Class<T> type) return one result or null, multiple results throws an exception
protected abstract javax.persistence.EntityManager	getEntityManager()
<T extends Serializable> T	update(T t)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_PAGE_SIZE

public static final int DEFAULT_PAGE_SIZE

default page size (max results), used when no maximum is given.

See Also:

Constant Field Values

EDITORROLE

public static final String EDITORROLE

See Also:

Constant Field Values

Constructor Detail

AbstractCrudService

public AbstractCrudService()

Method Detail

getEntityManager

protected abstract javax.persistence.EntityManager getEntityManager()

find

public <T extends Serializable> T find(Serializable id,
                                       Class<T> type)

Specified by:

find in interface CrudReadService

findAll

public <T extends Serializable> List<T> findAll(Class<T> type)

Specified by:

findAll in interface CrudReadService

findDynamic

public <T extends Serializable> List<T> findDynamic(Integer first,
                                                    Integer pageSize,
                                                    Map<String,CrudReadService.SORTORDER> sort,
                                                    List<Param> params,
                                                    Class<T> type)

Specified by:

findDynamic in interface CrudReadService

Type Parameters:

T -

Parameters:

first - defaults to 0

pageSize - defaults to DEFAULT_PAGE_SIZE, negative value means no limit

sort -

params -

type -

Returns:

countDynamic

public int countDynamic(List<Param> params,
                        Class type)

Specified by:

countDynamic in interface CrudReadService

find

public <T extends Serializable> List<T> find(String namedQuery,
                                             List<Param> params,
                                             Integer first,
                                             Integer max,
                                             Class<T> type)

Specified by:

find in interface CrudReadService

Type Parameters:

T -

Parameters:

namedQuery -

params -

first - defaults to 0

max - defaults to DEFAULT_PAGE_SIZE, negative value means no limit

type -

Returns:

findNative

public <T extends Serializable> List<T> findNative(String namedNativeQuery,
                                                   List<Param> params,
                                                   Integer first,
                                                   Integer max,
                                                   Class<T> type)

Specified by:

findNative in interface CrudReadService

Type Parameters:

T -

Parameters:

namedNativeQuery -

params -

first -

max - defaults to DEFAULT_PAGE_SIZE, negative value means no limit

type -

Returns:

count

public int count(String namedQuery,
                 List<Param> params)

Description copied from interface: CrudReadService

Use in conjunction with CrudReadService.find(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class) or CrudReadService.findNative(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class).

Specified by:

count in interface CrudReadService

Returns:

findOne

public <T extends Serializable> T findOne(String namedQuery,
                                          List<Param> params,
                                          Class<T> type)

Description copied from interface: CrudReadService

return one result or null, multiple results throws an exception

Specified by:

findOne in interface CrudReadService

Returns:

create

@RolesAllowed(value="editor")
public <T extends Serializable> T create(T t)

Specified by:

create in interface CrudWriteService

update

@RolesAllowed(value="editor")
public <T extends Serializable> T update(T t)

Specified by:

update in interface CrudWriteService

delete

@RolesAllowed(value="editor")
public void delete(Serializable t)

Specified by:

delete in interface CrudWriteService