org.deri.cqels.engine

Class GroupRouter

java.lang.Object

org.deri.cqels.engine.OpRouterBase

org.deri.cqels.engine.OpRouter1

org.deri.cqels.engine.GroupRouter

All Implemented Interfaces:

OpRouter

public class GroupRouter
extends OpRouter1

This class implements the router with group-by operator

Author:

Danh Le Phuoc, Chan Le Van

See Also:

OpRouter1

Constructor Summary

Constructors

Constructor and Description
GroupRouter(ExecContext context, com.hp.hpl.jena.sparql.algebra.op.OpGroup op, OpRouter sub)

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
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.OpRouter1

setSub, sub

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

GroupRouter

public GroupRouter(ExecContext context,
           com.hp.hpl.jena.sparql.algebra.op.OpGroup op,
           OpRouter sub)

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

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

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

visit

public void visit(RouterVisitor rv)