com.impetus.kundera.persistence

Class AbstractEntityReader

java.lang.Object

com.impetus.kundera.persistence.AbstractEntityReader

public class AbstractEntityReader
extends Object

The Class AbstractEntityReader.

Author:

vivek.mishra

Field Summary

Fields

Modifier and Type	Field and Description
private AssociationBuilder	associationBuilder
protected EntityManagerFactoryImpl.KunderaMetadata	kunderaMetadata
protected KunderaQuery	kunderaQuery
private static org.slf4j.Logger	log The log.

Constructor Summary

Constructors

Constructor and Description
AbstractEntityReader(EntityManagerFactoryImpl.KunderaMetadata kunderaMetadata)

Method Summary

Methods

Modifier and Type	Method and Description
private void	addToRelationStack(Map<Object,Object> relationStack, Object entity, EntityMetadata m)
private boolean	compareTo(Object relationalEntity, Object originalEntity) Compares original with relational entity.
private Boolean	existsInRelationStack(Map<Object,Object> relationStack, Object entity, EntityMetadata m)
protected Set<String>	fetchDataFromLucene(Class<?> clazz, Client client) Fetch data from lucene.
private Object	fetchFromRelationStack(Map<Object,Object> relationStack, Object entity, EntityMetadata m)
private List	fetchRelations(Relation relation, EntityMetadata metadata, PersistenceDelegator pd, Object entityId, Object relationValue, EntityMetadata targetEntityMetadata) Based on relation type, method invokes database to fetch relation entities.
protected EnhanceEntity	findById(Object primaryKey, EntityMetadata m, Client client) Retrieves an entity from ID
private AssociationBuilder	getAssociationBuilder() Returns association builder instance.
private Object	getEntity(Object relationEntity) Returns wrapped entity.
protected Object	getId(Object entity, EntityMetadata metadata) Gets the id.
private Map<String,Object>	getPersistedRelations(Object relationEntity) Returns wrapped relations.
private Object	handleAssociation(Object entity, Map<String,Object> relationsMap, EntityMetadata m, PersistenceDelegator pd, boolean lazilyloaded, Map<Object,Object> relationStack) Recursively fetches associated entities for a given entity
protected List<EnhanceEntity>	onAssociationUsingLucene(EntityMetadata m, Client client, List<EnhanceEntity> ls) On association using lucene.
private void	onParseRelation(Object entity, PersistenceDelegator pd, EntityMetadata targetEntityMetadata, Object relationEntity, Relation relation, boolean lazilyloaded, Map<Object,Object> relationStack) Invokes parseRelations for relation entity and set relational entity within entity
private void	onRelation(Object entity, Map<String,Object> relationsMap, EntityMetadata m, PersistenceDelegator pd, Relation relation, Relation.ForeignKey relationType, boolean lazilyloaded, Map<Object,Object> relationStack) Parse over each relation of fetched entity.
private void	onRelation(Object entity, Map<String,Object> relationsMap, Relation relation, EntityMetadata metadata, PersistenceDelegator pd, boolean lazilyloaded, Map<Object,Object> relationStack) Method to handle one to one association relation events.
private void	parseRelations(Object originalEntity, Object relationEntity, Map<String,Object> relationsMap, PersistenceDelegator pd, EntityMetadata metadata, boolean lazilyloaded, Map<Object,Object> relationStack) Parse relations of provided relationEntity.
Object	recursivelyFindEntities(Object entity, Map<String,Object> relationsMap, EntityMetadata m, PersistenceDelegator pd, boolean lazilyLoaded, Map<Object,Object> relationStack) Recursively fetches associated entities for a given entity
private void	setRelationToEntity(Object entity, Object relationEntity, Relation relation) After successfully parsing set relational entity object within entity object.
protected List<EnhanceEntity>	transform(EntityMetadata m, List<EnhanceEntity> ls, List resultList) Transform.

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.slf4j.Logger log

The log.

associationBuilder

private AssociationBuilder associationBuilder

kunderaQuery

protected KunderaQuery kunderaQuery

kunderaMetadata

protected EntityManagerFactoryImpl.KunderaMetadata kunderaMetadata

Constructor Detail

AbstractEntityReader

public AbstractEntityReader(EntityManagerFactoryImpl.KunderaMetadata kunderaMetadata)

Method Detail

findById

protected EnhanceEntity findById(Object primaryKey,
                     EntityMetadata m,
                     Client client)

Retrieves an entity from ID

Parameters:

primaryKey -

m -

client -

Returns:

handleAssociation

private Object handleAssociation(Object entity,
                       Map<String,Object> relationsMap,
                       EntityMetadata m,
                       PersistenceDelegator pd,
                       boolean lazilyloaded,
                       Map<Object,Object> relationStack)

Recursively fetches associated entities for a given entity

Parameters:

entity -

relationsMap -

client -

m -

pd -

relationStack -

Returns:

onRelation

private void onRelation(Object entity,
              Map<String,Object> relationsMap,
              EntityMetadata m,
              PersistenceDelegator pd,
              Relation relation,
              Relation.ForeignKey relationType,
              boolean lazilyloaded,
              Map<Object,Object> relationStack)

Parse over each relation of fetched entity.

Parameters:

entity -

relationsMap -

m -

pd -

relation -

relationType -

lazilyloaded -

relationStack -

onRelation

private void onRelation(Object entity,
              Map<String,Object> relationsMap,
              Relation relation,
              EntityMetadata metadata,
              PersistenceDelegator pd,
              boolean lazilyloaded,
              Map<Object,Object> relationStack)

Method to handle one to one association relation events.

Parameters:

entity - relation owning entity.

entityId - entity id of relation owning entity.

relationsMap - contains relation name and it's value.

relationStack -

m - entity metadata.

onParseRelation

private void onParseRelation(Object entity,
                   PersistenceDelegator pd,
                   EntityMetadata targetEntityMetadata,
                   Object relationEntity,
                   Relation relation,
                   boolean lazilyloaded,
                   Map<Object,Object> relationStack)

Invokes parseRelations for relation entity and set relational entity within entity

Parameters:

entity -

pd -

targetEntityMetadata -

relationEntity -

relation -

lazilyloaded -

relationStack -

setRelationToEntity

private void setRelationToEntity(Object entity,
                       Object relationEntity,
                       Relation relation)

After successfully parsing set relational entity object within entity object.

Parameters:

entity -

relationEntity -

relation -

parseRelations

private void parseRelations(Object originalEntity,
                  Object relationEntity,
                  Map<String,Object> relationsMap,
                  PersistenceDelegator pd,
                  EntityMetadata metadata,
                  boolean lazilyloaded,
                  Map<Object,Object> relationStack)

Parse relations of provided relationEntity.

Parameters:

originalEntity -

relationEntity -

relationsMap -

pd -

metadata -

lazilyloaded -

relationStack -

addToRelationStack

private void addToRelationStack(Map<Object,Object> relationStack,
                      Object entity,
                      EntityMetadata m)

Parameters:

relationStack -

entity -

m -

existsInRelationStack

private Boolean existsInRelationStack(Map<Object,Object> relationStack,
                            Object entity,
                            EntityMetadata m)

Parameters:

relationStack -

entity -

m -

Returns:

fetchFromRelationStack

private Object fetchFromRelationStack(Map<Object,Object> relationStack,
                            Object entity,
                            EntityMetadata m)

Parameters:

relationStack -

entity -

m -

Returns:

fetchRelations

private List fetchRelations(Relation relation,
                  EntityMetadata metadata,
                  PersistenceDelegator pd,
                  Object entityId,
                  Object relationValue,
                  EntityMetadata targetEntityMetadata)

Based on relation type, method invokes database to fetch relation entities.

Parameters:

relation - relation

metadata - entity metadata

pd - persistence delegator

entityId - entity id

relationValue - relational value

targetEntityMetadata - relational entity's metadata.

Returns:

list of fetched relations.

recursivelyFindEntities

public Object recursivelyFindEntities(Object entity,
                             Map<String,Object> relationsMap,
                             EntityMetadata m,
                             PersistenceDelegator pd,
                             boolean lazilyLoaded,
                             Map<Object,Object> relationStack)

Recursively fetches associated entities for a given entity

Parameters:

entity -

relationsMap -

client -

m -

pd -

Returns:

getPersistedRelations

private Map<String,Object> getPersistedRelations(Object relationEntity)

Returns wrapped relations.

Parameters:

relationEntity -

Returns:

getEntity

private Object getEntity(Object relationEntity)

Returns wrapped entity.

Parameters:

relationEntity -

Returns:

onAssociationUsingLucene

protected List<EnhanceEntity> onAssociationUsingLucene(EntityMetadata m,
                                           Client client,
                                           List<EnhanceEntity> ls)

On association using lucene.

Parameters:

m - the m

client - the client

ls - the ls

Returns:

the list

transform

protected List<EnhanceEntity> transform(EntityMetadata m,
                            List<EnhanceEntity> ls,
                            List resultList)

Transform.

Parameters:

m - the m

ls - the ls

resultList - the result list

Returns:

the list

fetchDataFromLucene

protected Set<String> fetchDataFromLucene(Class<?> clazz,
                              Client client)

Fetch data from lucene.

Parameters:

client - the client

Returns:

the sets the

getId

protected Object getId(Object entity,
           EntityMetadata metadata)

Gets the id.

Parameters:

entity - the entity

metadata - the metadata

Returns:

the id

compareTo

private boolean compareTo(Object relationalEntity,
                Object originalEntity)

Compares original with relational entity.

Parameters:

relationalEntity -

originalEntity -

Returns:

getAssociationBuilder

private AssociationBuilder getAssociationBuilder()

Returns association builder instance.

Returns:

association builder