org.deri.cqels.engine

Class HeuristicRoutingPolicy

java.lang.Object

org.deri.cqels.engine.RoutingPolicyBase

org.deri.cqels.engine.HeuristicRoutingPolicy

All Implemented Interfaces:

RoutingPolicy

public class HeuristicRoutingPolicy
extends RoutingPolicyBase

This class uses heuristic approach to build an execution plan

Author:

Danh Le Phuoc, Chan Le Van

Constructor Summary

Constructors

Constructor and Description
HeuristicRoutingPolicy(ExecContext context)

Method Summary

Methods

Modifier and Type	Method and Description
OpRouter	addRouter(OpRouter from, OpRouter newRouter) create the relationship between 2 router nodes.
OpRouter	generateRoutingPolicy(com.hp.hpl.jena.query.Query query) Creating the policy to route the mapping data
OpRouter	next(OpRouter curRouter, Mapping mapping) get the next router from the current router
ContinuousConstruct	registerConstructQuery(com.hp.hpl.jena.query.Query query) register the construct-type query with the engine
ContinuousSelect	registerSelectQuery(com.hp.hpl.jena.query.Query query) register the select-type query with the engine

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

getContext

Methods inherited from class java.lang.Object

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

Constructor Detail

HeuristicRoutingPolicy

public HeuristicRoutingPolicy(ExecContext context)

Method Detail

generateRoutingPolicy

public OpRouter generateRoutingPolicy(com.hp.hpl.jena.query.Query query)

Creating the policy to route the mapping data

Parameters:

query -

Returns:

a router representing a tree of operators

addRouter

public OpRouter addRouter(OpRouter from,
                 OpRouter newRouter)

create the relationship between 2 router nodes. This version uses hash table to identify which router will be the next for the mapping to go

Parameters:

from - the departing router

newRouter - the arriving router

Returns:

the arriving router

next

public OpRouter next(OpRouter curRouter,
            Mapping mapping)

get the next router from the current router

Parameters:

curRouter - current router

mapping -

Returns:

the next router

registerSelectQuery

public ContinuousSelect registerSelectQuery(com.hp.hpl.jena.query.Query query)

register the select-type query with the engine

Parameters:

query -

Returns:

registerConstructQuery

public ContinuousConstruct registerConstructQuery(com.hp.hpl.jena.query.Query query)

register the construct-type query with the engine

Parameters:

query -

Returns: