Examples of org.hibernate.ogm.model.spi.Association

org.hibernate.ogm.model.spi.Association
Represents an association (think of it as a set of rows, each representing a specific link).
An association accepts a {@link AssociationSnapshot} which is a read-only state of the association when read from thedatabase or freshly created.
An association collects changes applied to it. These changes are represented by a list of {@link AssociationOperation}. It is intended that {@link GridDialect}s retrieve these actions and apply them to the datastore. The list of changes is computed against the snapshot. @author Emmanuel Bernard <emmanuel@hibernate.org>

  }


  @Override
  public Association getAssociation(AssociationKey key, AssociationContext associationContext) {
    Map<RowKey, Map<String, Object>> associationMap = provider.getAssociation( key );
    return associationMap == null ? null : new Association( new MapAssociationSnapshot( associationMap ) );
  }

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  @Override
  public Association createAssociation(AssociationKey key, AssociationContext associationContext) {
    Map<RowKey, Map<String, Object>> associationMap = new HashMap<RowKey, Map<String,Object>>();
    provider.putAssociation( key, associationMap );
    return new Association( new MapAssociationSnapshot( associationMap ) );
  }

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        .associationKeyMetadata( associationKeyMetadata )
        .session( session )
        .associationTypeContext( associationTypeContext )
        .hostingEntity( session.getPersistenceContext().getEntity( new org.hibernate.engine.spi.EntityKey( (Serializable) uniqueKey, inversePersister ) ) );


    final Association ids = associationPersister.getAssociationOrNull();


    if (ids == null || ids.size() == 0 ) {
      return null;
    }
    else if (ids.size() == 1) {
      //EntityLoader#loadByUniqueKey uses a null object and LockMode.NONE
      //there is only one element in the list, so get the first
      Tuple tuple = ids.get( ids.getKeys().iterator().next() );
      final Serializable id = (Serializable) getGridIdentifierType().nullSafeGet( tuple, getIdentifierColumnNames(), session, null );
      return load( id, null, LockMode.NONE, session );
    }
    else {
      throw new AssertionFailure(

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    Node entityNode = entityQueries.get( entityKey.getMetadata() ).findEntity( executionEngine, entityKey.getColumnValues() );
    GraphLogger.log( "Found owner node: %1$s", entityNode );
    if ( entityNode == null ) {
      return null;
    }
    return new Association(
        new Neo4jAssociationSnapshot(
            entityNode,
            associationKey,
            associationContext.getAssociatedEntityKeyMetadata(),
            associationContext.getRoleOnMainSide()

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    );
  }


  @Override
  public Association createAssociation(AssociationKey associationKey, AssociationContext associationContext) {
    return new Association();
  }

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    // been created
    executeBatch( associationContext.getOperationsQueue() );
    if ( storageStrategy == AssociationStorageStrategy.IN_ENTITY ) {
      DBObject entity = getEmbeddingEntity( key, associationContext );
      if ( getAssociationFieldOrNull( key, entity ) != null ) {
        return new Association( new MongoDBAssociationSnapshot( entity, key, storageStrategy ) );
      }
      else {
        return null;
      }
    }
    final DBObject result = findAssociation( key, associationContext, storageStrategy );
    if ( result == null ) {
      return null;
    }
    else {
      return new Association( new MongoDBAssociationSnapshot( result, key, storageStrategy ) );
    }
  }

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          this.getCollection( key.getEntityKey() ).update( entityId, updater, true, false, writeConcern );
          //adding assoc after update because the query takes the whole object today
          addEmptyAssociationField( key, entity );
        }
      }
      return new Association( new MongoDBAssociationSnapshot( entity, key, storageStrategy ) );
    }
    DBCollection associations = getAssociationCollection( key, storageStrategy );
    DBObject assoc = associationKeyToObject( key, storageStrategy );


    assoc.put( ROWS_FIELDNAME, Collections.EMPTY_LIST );


    associations.insert( assoc, writeConcern );


    return new Association( new MongoDBAssociationSnapshot( assoc, key, storageStrategy ) );
  }

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      return null;
    }
    else {
      @SuppressWarnings("unchecked")
      Map<SerializableRowKey, Map<String, Object>> associationRows = (Map<SerializableRowKey, Map<String, Object>>) element.getObjectValue();
      return new Association( new SerializableMapAssociationSnapshot( associationRows ) );
    }
  }

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  @Override
  public Association createAssociation(AssociationKey key, AssociationContext associationContext) {
    final Cache<SerializableAssociationKey> associationCache = datastoreProvider.getAssociationCache();
    Map<SerializableRowKey, Map<String, Object>> association = new HashMap<SerializableRowKey, Map<String, Object>>();
    associationCache.put( new Element( new SerializableAssociationKey( key ), association ) );
    return new Association( new SerializableMapAssociationSnapshot( association ) );
  }

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      if ( association != null ) {
        couchDBAssociation = CouchDBAssociation.fromAssociationDocument( association );
      }
    }


    return couchDBAssociation != null ? new Association( new CouchDBAssociationSnapshot( couchDBAssociation, key ) ) : null;
  }

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