uk.ac.ic.doc.automed.p2p.qproc.planner
Interface QPlannerAlgorithm

public interface QPlannerAlgorithm

Method Summary

void	clear()
void	constructSchema(java.util.Set keywords, java.util.Map MCons, java.util.Map Ranges) Create a query schema from a keyword-based query
boolean	isStop() Check whether the algorithm has stopped and result is ready to collect
java.util.Set[]	makeSchemaInstances(Graph schemaGraph, java.util.Set keywords) Generates schema instances from a schema graph
java.util.Set[]	plan(ASG q, int length, ReformulationConfiguration config) Used by the general version which finds join paths up to a given length
java.util.Set[]	plan(ASG q, ReformulationConfiguration config) Used by the basic qplanner algorithm

Method Detail

plan

java.util.Set[] plan(ASG q,
                     ReformulationConfiguration config)
                     throws QProcException

Used by the basic qplanner algorithm

Parameters:

q -

config -

Returns:

Throws:

QProcException

plan

java.util.Set[] plan(ASG q,
                     int length,
                     ReformulationConfiguration config)
                     throws QProcException

Used by the general version which finds join paths up to a given length

Parameters:

q -

length -

config -

Returns:

Throws:

QProcException

constructSchema

void constructSchema(java.util.Set keywords,
                     java.util.Map MCons,
                     java.util.Map Ranges)
                     throws QProcException

Create a query schema from a keyword-based query

Parameters:

query - user query

MCons - a hash map [scheme -> Cons] of scheme constraints

Ranges - a hash map [scheme -> range] of scheme ranges

Throws:

QProcException

makeSchemaInstances

java.util.Set[] makeSchemaInstances(Graph schemaGraph,
                                    java.util.Set keywords)
                                    throws QProcException

Generates schema instances from a schema graph

Parameters:

schemaGraph -

query -

Returns:

Set[] an array of two sets: (1)JPSet and (2) set of schema instances

Throws:

QProcException

isStop

boolean isStop()

Check whether the algorithm has stopped and result is ready to collect

Returns:

clear

void clear()