com.clarkparsia.pellet.sparqldl.engine

Class IncrementalQueryPlan

java.lang.Object

com.clarkparsia.pellet.sparqldl.engine.QueryPlan

com.clarkparsia.pellet.sparqldl.engine.IncrementalQueryPlan

public class IncrementalQueryPlan
extends QueryPlan

Title: Query Plan that recomputes the cost of the query in a greedy way.

Description: TODO cache costs - not to recompute them

Copyright: Copyright (c) 2007

Company: Clark & Parsia, LLC.

Author:

Petr Kremen

Field Summary

Fields

Modifier and Type	Field and Description
Stack<Integer>	explored

Fields inherited from class com.clarkparsia.pellet.sparqldl.engine.QueryPlan

query

Constructor Summary

Constructors

Constructor and Description
IncrementalQueryPlan(Query query)

Method Summary

Modifier and Type	Method and Description
void	back() Goes one level back to the last atom.
boolean	hasNext() Checks whether there is another atom to execute.
QueryAtom	next(ResultBinding binding) Returns next atom to be executed w.r.
void	reset() Resets the query planner.

Methods inherited from class com.clarkparsia.pellet.sparqldl.engine.QueryPlan

getQuery

Methods inherited from class java.lang.Object

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

Field Detail

explored

public final Stack<Integer> explored

Constructor Detail

IncrementalQueryPlan

public IncrementalQueryPlan(Query query)

Method Detail

next

public QueryAtom next(ResultBinding binding)

Description copied from class: QueryPlan

Returns next atom to be executed w.r. to the current binding.

Specified by:

next in class QueryPlan

Returns:

hasNext

public boolean hasNext()

Description copied from class: QueryPlan

Checks whether there is another atom to execute.

Specified by:

hasNext in class QueryPlan

Returns:

true if there is another atom to execute.

back

public void back()

Description copied from class: QueryPlan

Goes one level back to the last atom.

Specified by:

back in class QueryPlan

reset

public void reset()

Description copied from class: QueryPlan

Resets the query planner.

Specified by:

reset in class QueryPlan