Class PhysicalPlanWithNaryRootImpl

java.lang.Object

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

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

All Implemented Interfaces:

QueryPlan, PhysicalPlan, PhysicalPlanWithNaryRoot

public class PhysicalPlanWithNaryRootImpl
extends BaseForQueryPlan
implements PhysicalPlanWithNaryRoot

Field Summary

Fields

Modifier and Type	Field	Description
protected final NaryPhysicalOp	rootOp
protected final List<PhysicalPlan>	subPlans

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

id

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp, List<PhysicalPlan> subPlans)	Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.
protected	PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp, QueryPlanningInfo qpInfo, List<PhysicalPlan> subPlans)	Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.
protected	PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp, QueryPlanningInfo qpInfo, PhysicalPlan... subPlans)	Instead of creating such a plan directly using this constructor, use PhysicalPlanFactory.
protected	PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp, PhysicalPlan... subPlans)	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.
NaryPhysicalOp	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).
Iterator<PhysicalPlan>	getSubPlans()	Convenience method that always should return an iterator over the same sub-plans that can be accessed via PhysicalPlan.getSubPlan(int).
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

Field Details

rootOp

protected final NaryPhysicalOp rootOp

subPlans

protected final List<PhysicalPlan> subPlans

Constructor Details

PhysicalPlanWithNaryRootImpl

protected PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp,
 PhysicalPlan... subPlans)

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

PhysicalPlanWithNaryRootImpl

protected PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp,
 QueryPlanningInfo qpInfo,
 PhysicalPlan... subPlans)

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.

PhysicalPlanWithNaryRootImpl

protected PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp,
 List<PhysicalPlan> subPlans)

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

PhysicalPlanWithNaryRootImpl

protected PhysicalPlanWithNaryRootImpl(NaryPhysicalOp rootOp,
 QueryPlanningInfo qpInfo,
 List<PhysicalPlan> subPlans)

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

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

getSubPlans

public Iterator<PhysicalPlan> getSubPlans()

Description copied from interface: PhysicalPlanWithNaryRoot

Convenience method that always should return an iterator over the same sub-plans that can be accessed via PhysicalPlan.getSubPlan(int).

Specified by:

getSubPlans in interface PhysicalPlanWithNaryRoot

getRootOperator

public NaryPhysicalOp getRootOperator()

Description copied from interface: QueryPlan

Returns the root operator of this plan.

Specified by:

getRootOperator in interface PhysicalPlan

Specified by:

getRootOperator in interface PhysicalPlanWithNaryRoot

Specified by:

getRootOperator in interface QueryPlan