com.bigdata.rdf.sparql.ast

Class CompiledSolutionSetStats

java.lang.Object

com.bigdata.rdf.sparql.ast.CompiledSolutionSetStats

All Implemented Interfaces:

ISolutionSetStats, Serializable

public class CompiledSolutionSetStats
extends Object
implements ISolutionSetStats, Serializable

Class models the compiled statistics based on the observed solutions.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CompiledSolutionSetStats(long nsolutions, Set<IVariable<?>> usedVars, Set<IVariable<?>> alwaysBound, Set<IVariable<?>> notAlwaysBound, Set<IVariable<?>> materialized, Map<IVariable<?>,IConstant<?>> constants) Constructor exposes unmodifable versions of its arguments.

Method Summary

Methods

Modifier and Type	Method and Description
Set<IVariable<?>>	getAlwaysBound() Return the subset of the variables which are bound in all solutions.
Map<IVariable<?>,IConstant<?>>	getConstants() The set of variables which are effective constants (they are bound in every solution and always to the same value) together with their constant bindings.
Set<IVariable<?>>	getMaterialized() Return the subset of the variables which are materialized in all solutions in which they appear (the variables do not have to be bound in every solution, but if they are bound then their IVCache association is always set).
Set<IVariable<?>>	getNotAlwaysBound() Return the subset of the variables which are NOT bound in all solutions.
long	getSolutionSetSize() Return the #of solutions.
Set<IVariable<?>>	getUsedVars() Return the set of variables which in at least one solution.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

CompiledSolutionSetStats

public CompiledSolutionSetStats(long nsolutions,
                        Set<IVariable<?>> usedVars,
                        Set<IVariable<?>> alwaysBound,
                        Set<IVariable<?>> notAlwaysBound,
                        Set<IVariable<?>> materialized,
                        Map<IVariable<?>,IConstant<?>> constants)

Constructor exposes unmodifable versions of its arguments.

Parameters:

nsolutions - The #of solutions.

usedVars - The set of variables observed across all solutions.

alwaysBound - The set of variables which are bound in ALL solutions.

notAlwaysBound - The set of variables which are NOT bound in at least one solution (e.g., MAYBE bound semantics).

materialized - The set of variables whose bound value has its IVCache association set in all solutions in which that variable is bound.

constants - The set of variables which are effective constants (they are bound in every solution and always to the same value) together with their constant bindings.

Method Detail

getSolutionSetSize

public long getSolutionSetSize()

Description copied from interface: ISolutionSetStats

Return the #of solutions.

Specified by:

getSolutionSetSize in interface ISolutionSetStats

getUsedVars

public Set<IVariable<?>> getUsedVars()

Description copied from interface: ISolutionSetStats

Return the set of variables which in at least one solution.

Specified by:

getUsedVars in interface ISolutionSetStats

getAlwaysBound

public Set<IVariable<?>> getAlwaysBound()

Description copied from interface: ISolutionSetStats

Return the subset of the variables which are bound in all solutions.

Specified by:

getAlwaysBound in interface ISolutionSetStats

getNotAlwaysBound

public Set<IVariable<?>> getNotAlwaysBound()

Description copied from interface: ISolutionSetStats

Return the subset of the variables which are NOT bound in all solutions.

Specified by:

getNotAlwaysBound in interface ISolutionSetStats

getMaterialized

public Set<IVariable<?>> getMaterialized()

Description copied from interface: ISolutionSetStats

Return the subset of the variables which are materialized in all solutions in which they appear (the variables do not have to be bound in every solution, but if they are bound then their IVCache association is always set).

Specified by:

getMaterialized in interface ISolutionSetStats

getConstants

public Map<IVariable<?>,IConstant<?>> getConstants()

Description copied from interface: ISolutionSetStats

The set of variables which are effective constants (they are bound in every solution and always to the same value) together with their constant bindings.

Specified by:

getConstants in interface ISolutionSetStats

Returns:

The set of variables which are effective constants.

toString

public String toString()

Overrides:

toString in class Object