com.bigdata.bop

Class BOpIdFactory

java.lang.Object

com.bigdata.bop.BOpIdFactory

All Implemented Interfaces:

IdFactory

public class BOpIdFactory
extends Object
implements IdFactory

A factory which may be used when some identifiers need to be reserved.

Constructor Summary

Constructors

Constructor and Description
BOpIdFactory()

Method Summary

Methods

Modifier and Type	Method and Description
int	nextId() Issue the next bop identifier.
void	reserve(int id) Reserve a bop id by adding it to a set of known identifiers that will not be issued by nextId().
void	reserveIds(IConstraint[] constraints) Reserve ids used by the constraints for some predicate or join graph.
void	reserveIds(IPredicate<?>[] preds) Reserve ids used by the predicates in some join graph.

Methods inherited from class java.lang.Object

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

Constructor Detail

BOpIdFactory

public BOpIdFactory()

Method Detail

reserve

public void reserve(int id)

Reserve a bop id by adding it to a set of known identifiers that will not be issued by nextId().

Parameters:

id - The identifier.

nextId

public int nextId()

Description copied from interface: IdFactory

Issue the next bop identifier.

Specified by:

nextId in interface IdFactory

reserveIds

public void reserveIds(IPredicate<?>[] preds)

Reserve ids used by the predicates in some join graph.

Parameters:

preds - The vertices of the join graph.

reserveIds

public void reserveIds(IConstraint[] constraints)

Reserve ids used by the constraints for some predicate or join graph.

Parameters:

constraints - The constraints that attach to some predicate (optional).