switch ( sink.getType() ) {
case NodeTypeEnums.JoinNode : {
BetaMemory memory = (BetaMemory) context.wm.getNodeMemory( (BetaNode) sink );
memory.getLeftTupleMemory().add( parentLeftTuple );
while ( stream.readShort() == PersisterEnums.RIGHT_TUPLE ) {
LeftTupleSink childSink = (LeftTupleSink) sinks.get( stream.readInt() );
int factHandleId = stream.readInt();
RightTupleKey key = new RightTupleKey( factHandleId,
sink );
RightTuple rightTuple = context.rightTuples.get( key );