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

Class PhysicalPlanWithNullaryRootImpl

java.lang.Object

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

All Implemented Interfaces:

PhysicalPlan, PhysicalPlanWithNullaryRoot

public class PhysicalPlanWithNullaryRootImpl
extends Object
implements PhysicalPlanWithNullaryRoot

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
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	hashCode()
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 java.lang.Object

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

Constructor Details

PhysicalPlanWithNullaryRootImpl

protected PhysicalPlanWithNullaryRootImpl(NullaryPhysicalOp rootOp)

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

Method Details

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getRootOperator

public NullaryPhysicalOp getRootOperator()

Description copied from interface: PhysicalPlan

Returns the root operator of this plan.

Specified by:

getRootOperator in interface PhysicalPlan

Specified by:

getRootOperator in interface PhysicalPlanWithNullaryRoot

getExpectedVariables

public ExpectedVariables getExpectedVariables()

Description copied from interface: PhysicalPlan

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

Specified by:

getExpectedVariables in interface PhysicalPlan

numberOfSubPlans

public int numberOfSubPlans()

Description copied from interface: PhysicalPlan

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 PhysicalPlan

getSubPlan

public PhysicalPlan getSubPlan(int i)
                        throws NoSuchElementException

Description copied from interface: PhysicalPlan

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

Throws:

NoSuchElementException