Class PhysicalPlanWithNullaryRootImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.base.impl.BaseForQueryPlan

se.liu.ida.hefquin.engine.queryplan.physical.impl.PhysicalPlanWithNullaryRootImpl

All Implemented Interfaces:

QueryPlan, PhysicalPlan, PhysicalPlanWithNullaryRoot

public class PhysicalPlanWithNullaryRootImpl
extends BaseForQueryPlan
implements PhysicalPlanWithNullaryRoot

Field Summary

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.base.impl.BaseForQueryPlan

id

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PhysicalPlanWithNullaryRootImpl(NullaryPhysicalOp rootOp)	Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.
protected	PhysicalPlanWithNullaryRootImpl(NullaryPhysicalOp rootOp, QueryPlanningInfo qpInfo)	Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.

Method Summary

Modifier and Type	Method	Description
ExpectedVariables	getExpectedVariables()	Returns the variables that can be expected in the solution mappings produced by this plan.
NullaryPhysicalOp	getRootOperator()	Returns the root operator of this plan.
PhysicalPlan	getSubPlan(int i)	Returns the i-th sub-plan of this plan, where i starts at index 0 (zero).
int	numberOfSubPlans()	Returns the number of sub-plans that this plan has (considering sub-plans that are direct children of the root operator of this plan).

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.base.impl.BaseForQueryPlan

equals, getID, getQueryPlanningInfo, hashCode, hasQueryPlanningInfo

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.base.QueryPlan

getID, getQueryPlanningInfo, hasQueryPlanningInfo, isSamePlan

Constructor Details

PhysicalPlanWithNullaryRootImpl

protected PhysicalPlanWithNullaryRootImpl(NullaryPhysicalOp rootOp)

Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.

PhysicalPlanWithNullaryRootImpl

protected PhysicalPlanWithNullaryRootImpl(NullaryPhysicalOp rootOp,
 QueryPlanningInfo qpInfo)

Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.

This constructor should be used only if the plan is meant to be constructed with an already existing QueryPlanningInfo object. Since this object may later be extended with additional properties for this plan, it is important not to create multiple plans with the same QueryPlanningInfo object.

Method Details

getRootOperator

public NullaryPhysicalOp getRootOperator()

Description copied from interface: QueryPlan

Returns the root operator of this plan.

Specified by:

getRootOperator in interface PhysicalPlan

Specified by:

getRootOperator in interface PhysicalPlanWithNullaryRoot

Specified by:

getRootOperator in interface QueryPlan

getExpectedVariables

public ExpectedVariables getExpectedVariables()

Description copied from interface: QueryPlan

Returns the variables that can be expected in the solution mappings produced by this plan.

Specified by:

getExpectedVariables in interface QueryPlan

numberOfSubPlans

public int numberOfSubPlans()

Description copied from interface: QueryPlan

Returns the number of sub-plans that this plan has (considering sub-plans that are direct children of the root operator of this plan).

Specified by:

numberOfSubPlans in interface QueryPlan

getSubPlan

public PhysicalPlan getSubPlan(int i)
                        throws NoSuchElementException

Description copied from interface: QueryPlan

Returns the i-th sub-plan of this plan, where i starts at index 0 (zero). If the plan has fewer sub-plans (or no sub-plans at all), then a NoSuchElementException will be thrown.

Specified by:

getSubPlan in interface PhysicalPlan

Specified by:

getSubPlan in interface QueryPlan

Throws:

NoSuchElementException