org.deri.cqels.engine

Class JoinRouter

java.lang.Object

org.deri.cqels.engine.OpRouterBase

org.deri.cqels.engine.OpRouter2

org.deri.cqels.engine.JoinRouter

All Implemented Interfaces:

OpRouter

public class JoinRouter
extends OpRouter2

This class implements a binary router processing the join operator

Author:

Danh Le Phuoc, Chan Le Van

See Also:

OpRouter2

Constructor Summary

Constructors

Constructor and Description
JoinRouter(ExecContext context, com.hp.hpl.jena.sparql.algebra.op.OpJoin op, OpRouter left, OpRouter right)

Method Summary

Methods

Modifier and Type	Method and Description
MappingIterator	getBuff() Each specific router contains a data buffer in the form of mappings This method will get that data buffer out
OpRouter	getOtherChildRouter(Mapping mapping)
void	route(Mapping mapping) This method route the specified mapping to higher node in the router-node tree
MappingIterator	searchBuff4Match(Mapping mapping) This method tries to search in the data mapping buffer whether there is any mapping that matches the specified mapping.
void	visit(RouterVisitor rv)

Methods inherited from class org.deri.cqels.engine.OpRouter2

left, right

Methods inherited from class org.deri.cqels.engine.OpRouterBase

_route, getId, getOp

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinRouter

public JoinRouter(ExecContext context,
          com.hp.hpl.jena.sparql.algebra.op.OpJoin op,
          OpRouter left,
          OpRouter right)

Method Detail

route

public void route(Mapping mapping)

Description copied from interface: OpRouter

This method route the specified mapping to higher node in the router-node tree

Specified by:

route in interface OpRouter

Overrides:

route in class OpRouterBase

Parameters:

mapping - the specified mapping

getOtherChildRouter

public OpRouter getOtherChildRouter(Mapping mapping)

getBuff

public MappingIterator getBuff()

Description copied from interface: OpRouter

Each specific router contains a data buffer in the form of mappings This method will get that data buffer out

Specified by:

getBuff in interface OpRouter

Overrides:

getBuff in class OpRouterBase

searchBuff4Match

public MappingIterator searchBuff4Match(Mapping mapping)

Description copied from interface: OpRouter

This method tries to search in the data mapping buffer whether there is any mapping that matches the specified mapping.

Specified by:

searchBuff4Match in interface OpRouter

Overrides:

searchBuff4Match in class OpRouterBase

Parameters:

mapping - the specified mapping

Returns:

a mapping iterator of matched mappings in buffer

visit

public void visit(RouterVisitor rv)