edu.rpi.twc.sesamestream.impl

Class PartialSolution

java.lang.Object

edu.rpi.twc.sesamestream.impl.PartialSolution

public class PartialSolution
extends Object

An intermediate result in the answering of a continuous query. It contains a SubscriptionImpl, zero or more already-completed bindings of variables to values, and a basic graph pattern (BGP) of one or more still-to-be-matched triple patterns. Logically, a SesameStream query engine's index is a set of PartialSolutions.

Author:

Joshua Shinavier (http://fortytwo.net)

Constructor Summary

Constructors

Constructor and Description
PartialSolution(SubscriptionImpl subscription) Constructs an initial partial solution with no bound variables.
PartialSolution(SubscriptionImpl subscription, LList<TriplePattern> graphPattern, VarList bindings) Constructs an partial solution with the specified bindings and triple patterns.

Method Summary

Modifier and Type	Method and Description
VarList	getBindings()
LList<TriplePattern>	getGraphPattern()
SubscriptionImpl	getSubscription()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

PartialSolution

public PartialSolution(SubscriptionImpl subscription)

Constructs an initial partial solution with no bound variables. This is the start state of a query, before any statements have been received.

Parameters:

subscription - an object containing the query and the handler for query results

PartialSolution

public PartialSolution(SubscriptionImpl subscription,
                       LList<TriplePattern> graphPattern,
                       VarList bindings)

Constructs an partial solution with the specified bindings and triple patterns.

Parameters:

subscription - an object containing the query and the handler for query results

graphPattern - the still-to-be-matched RDF triple patterns

bindings - the already-completed bindings of variables to values

Method Detail

getBindings

public VarList getBindings()

Returns:

the already-completed bindings of variables to values of this partial solution

getGraphPattern

public LList<TriplePattern> getGraphPattern()

Returns:

the still-to-be-matched RDF triple patterns of this partial solution

getSubscription

public SubscriptionImpl getSubscription()

Returns:

the subscription to which any complete solutions to this PartialSolution will be delivered

toString

public String toString()

Overrides:

toString in class Object