com.oberasoftware.jasdb.entitymapper

Class EntityManagerImpl

java.lang.Object

com.oberasoftware.jasdb.entitymapper.EntityManagerImpl

All Implemented Interfaces:

EntityManager

public class EntityManagerImpl
extends Object
implements EntityManager

Author:

Renze de Vries

Constructor Summary

Constructors

Constructor and Description
EntityManagerImpl(DBSession session)

Method Summary

Modifier and Type	Method and Description
<T> List<T>	findEntities(Class<T> types, QueryBuilder builder)
<T> List<T>	findEntities(Class<T> types, QueryBuilder builder, int limit)
<T> List<T>	findEntities(Class<T> types, QueryBuilder builder, int start, int limit)
<T> T	findEntity(Class<T> type, String entityId) Finds an entity by the identifier
SimpleEntity	persist(Object persistableObject) Does a persist which can either be a create or update operation against the database.
void	remove(Object persistableObject) Removes the object from storage

Methods inherited from class java.lang.Object

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

Constructor Detail

EntityManagerImpl

public EntityManagerImpl(DBSession session)

Method Detail

persist

public SimpleEntity persist(Object persistableObject)
                     throws JasDBStorageException

Description copied from interface: EntityManager

Does a persist which can either be a create or update operation against the database.

Specified by:

persist in interface EntityManager

Parameters:

persistableObject - The object to persist

Returns:

The persisted JasDB object that was stored

Throws:

JasDBStorageException - If unable to store the object

remove

public void remove(Object persistableObject)
            throws JasDBStorageException

Description copied from interface: EntityManager

Removes the object from storage

Specified by:

remove in interface EntityManager

Parameters:

persistableObject - The object to remove from storage

Throws:

JasDBStorageException - If unable to delete the object from storage

findEntity

public <T> T findEntity(Class<T> type,
                        String entityId)
                 throws JasDBStorageException

Description copied from interface: EntityManager

Finds an entity by the identifier

Specified by:

findEntity in interface EntityManager

Type Parameters:

T - The generic entity type

Parameters:

type - The target entity type you are trying to load

entityId - The identifier of the entity

Returns:

The loaded entity if found, null if not found

Throws:

JasDBStorageException - If unable to load entity from storage or unable to map to target type

findEntities

public <T> List<T> findEntities(Class<T> types,
                                QueryBuilder builder)
                         throws JasDBStorageException

Specified by:

findEntities in interface EntityManager

Type Parameters:

T - The generic entity type

Parameters:

types - The target entity type you are trying to load

builder - The query

Returns:

The list of found entities matching the query

Throws:

JasDBStorageException - If unable to load entities from storage or unable to map to target type

findEntities

public <T> List<T> findEntities(Class<T> types,
                                QueryBuilder builder,
                                int limit)
                         throws JasDBStorageException

Specified by:

findEntities in interface EntityManager

Type Parameters:

T - The generic entity type

Parameters:

types - The target entity type you are trying to load

builder - The query

limit - The maximum amount of entities to load

Returns:

The list of found entities matching the query

Throws:

JasDBStorageException - If unable to load entities from storage or unable to map to target type

findEntities

public <T> List<T> findEntities(Class<T> types,
                                QueryBuilder builder,
                                int start,
                                int limit)
                         throws JasDBStorageException

Specified by:

findEntities in interface EntityManager

Type Parameters:

T - The generic entity type

Parameters:

types - The target entity type you are trying to load

builder - The query

start - The starting pagination page

limit - The maximum amount of entities to load

Returns:

The list of found entities matching the query

Throws:

JasDBStorageException - If unable to load entities from storage or unable to map to target type