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

org.hibernate.ogm.model.spi.Tuple
Represents a Tuple (think of it as a row) A tuple accepts a TupleShapshot which is a read-only state of the tuple at creation time. A tuple collects changes applied to it. These changes are represented by a list of TupleOperation. It is intended that GridDialects retrieve to these actions and reproduce them to the datastore. The list of changes is computed based off the snapshot. @author Emmanuel Bernard <emmanuel@hibernate.org> @author Sanne Grinovero <sanne@hibernate.org>

  }


  private ClosableIterator<Tuple> doCount(MongoDBQueryDescriptor query, DBCollection collection) {
    long count = collection.count( query.getCriteria() );
    MapTupleSnapshot snapshot = new MapTupleSnapshot( Collections.<String, Object>singletonMap( "n", count ) );
    return CollectionHelper.newClosableIterator( Collections.singletonList( new Tuple( snapshot ) ) );
  }

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    }
  }


  private void executeBatchUpdate(Map<DBCollection, BatchInsertionTask> inserts, UpdateTupleOperation tupleOperation) {
    EntityKey entityKey = tupleOperation.getEntityKey();
    Tuple tuple = tupleOperation.getTuple();
    BatchableMongoDBTupleSnapshot snapshot = (BatchableMongoDBTupleSnapshot) tupleOperation.getTuple().getSnapshot();
    WriteConcern writeConcern = getWriteConcern( tupleOperation.getTupleContext() );


    if ( INSERT == snapshot.getOperationType() && columnNamesAllowBatchInsert( tupleOperation ) ) {
      prepareForInsert( inserts, snapshot, entityKey, tuple, writeConcern );

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    }


    @Override
    public Tuple next() {
      DBObject dbObject = cursor.next();
      return new Tuple( new MongoDBTupleSnapshot( dbObject, metadata ) );
    }

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    }
  }


  @SuppressWarnings("unchecked")
  private Tuple createTuple(final Element element) {
    return new Tuple( new MapTupleSnapshot( (Map<String, Object>) element.getObjectValue() ) );
  }

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  public Tuple createTuple(EntityKey key, TupleContext tupleContext) {
    final Cache<SerializableEntityKey> entityCache = datastoreProvider.getEntityCache();
    final HashMap<String, Object> tuple = new HashMap<String, Object>();
    entityCache.put( new Element( new SerializableEntityKey( key ), tuple ) );


    return new Tuple( new MapTupleSnapshot( tuple ) );
  }

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  @Override
  public Tuple getTuple(EntityKey key, TupleContext tupleContext) {
    EntityDocument entity = getDataStore().getEntity( Identifier.createEntityId( key ) );
    if ( entity != null ) {
      return new Tuple( new CouchDBTupleSnapshot( entity.getProperties() ) );
    }


    return null;
  }

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    return null;
  }


  @Override
  public Tuple createTuple(EntityKey key, TupleContext tupleContext) {
    return new Tuple( new CouchDBTupleSnapshot( key ) );
  }

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  private List<Object> getAssociationRows(Association association, AssociationKey associationKey) {


    List<Object> rows = new ArrayList<Object>( association.getKeys().size() );


    for ( RowKey rowKey : association.getKeys() ) {
      Tuple tuple = association.get( rowKey );


      String[] columnsToPersist = associationKey.getMetadata().getColumnsWithoutKeyColumns( tuple.getColumnNames() );


      // return value itself if there is only a single column to store
      if ( columnsToPersist.length == 1 ) {
        Object row = tuple.get( columnsToPersist[0] );
        rows.add( row );
      }
      else {
        Map<String, Object> row = new HashMap<String, Object>( columnsToPersist.length );
        for ( String columnName : columnsToPersist ) {
          row.put( columnName, tuple.get( columnName ) );
        }


        rows.add( row );
      }
    }

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    FineGrainedAtomicMap<String, Object> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, false );
    if ( atomicMap == null ) {
      return null;
    }
    else {
      return new Tuple( new InfinispanTupleSnapshot( atomicMap ) );
    }
  }

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  public Tuple createTuple(EntityKey key, TupleContext tupleContext) {
    //TODO we don't verify that it does not yet exist assuming that this has been done before by the calling code
    //should we improve?
    Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_STORE );
    FineGrainedAtomicMap<String,Object> atomicMap =  AtomicMapLookup.getFineGrainedAtomicMap( cache, key, true );
    return new Tuple( new InfinispanTupleSnapshot( atomicMap ) );
  }

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