org.fryske_akademy.ejb

Class AbstractCrudService

java.lang.Object

org.fryske_akademy.ejb.AbstractCrudService

All Implemented Interfaces:

CrudReadService, CrudWriteService

@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 EDITOR role to protect write operations.

An injected JpqlBuilder 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
static String	EDITOR

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 EntityInterface> T	createOrUpdate(T t)
void	delete(EntityInterface t)
<T extends EntityInterface> T	find(Serializable id, Class<T> type)
<T extends EntityInterface> List<T>	find(String namedQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T extends EntityInterface> List<T>	findAll(Class<T> type)
<T extends EntityInterface> List<T>	findDynamic(Integer first, Integer pageSize, Map<String,CrudReadService.SORTORDER> sort, List<Param> params, Class<T> type)
<T extends EntityInterface> List<T>	findNative(String namedNativeQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T extends EntityInterface> 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 EntityInterface> T	getRevision(Number n, Class<T> type) get historical data for a certain revision
<T extends EntityInterface> List<RevInfo<T>>	getRevisionInfo(T entity, Integer max, Class<T> type) return a list holding revision information, newest come first
<T extends EntityInterface> List<Number>	getRevisionNumbers(Object id, Class<T> type) return list of revision numbers, first is the oldest

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

See Also:

Constant Field Values

EDITOR

public static final String EDITOR

See Also:

Constant Field Values

Constructor Detail

AbstractCrudService

public AbstractCrudService()

Method Detail

getEntityManager

protected abstract javax.persistence.EntityManager getEntityManager()

find

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

Specified by:

find in interface CrudReadService

findAll

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

Specified by:

findAll in interface CrudReadService

findDynamic

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

Specified by:

findNative in interface CrudReadService

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 EntityInterface> 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:

getRevision

public <T extends EntityInterface> T getRevision(Number n,
                                                 Class<T> type)

Description copied from interface: CrudReadService

get historical data for a certain revision

Specified by:

getRevision in interface CrudReadService

Returns:

getRevisionInfo

public <T extends EntityInterface> List<RevInfo<T>> getRevisionInfo(T entity,
                                                                    Integer max,
                                                                    Class<T> type)

Description copied from interface: CrudReadService

return a list holding revision information, newest come first

Specified by:

getRevisionInfo in interface CrudReadService

max - the maximum to number of results to return, defaults to 5

Returns:

createOrUpdate

@RolesAllowed(value="editor")
public <T extends EntityInterface> T createOrUpdate(T t)

Specified by:

createOrUpdate in interface CrudWriteService

delete

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

Specified by:

delete in interface CrudWriteService

getRevisionNumbers

public <T extends EntityInterface> List<Number> getRevisionNumbers(Object id,
                                                                   Class<T> type)

Description copied from interface: CrudReadService

return list of revision numbers, first is the oldest

Specified by:

getRevisionNumbers in interface CrudReadService

Returns: