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

Class LogicalPlanWithNullaryRootImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.logical.impl.LogicalPlanWithNullaryRootImpl

All Implemented Interfaces:

LogicalPlan, LogicalPlanWithNullaryRoot

public class LogicalPlanWithNullaryRootImpl
extends Object
implements LogicalPlanWithNullaryRoot

Constructor Summary

Constructors

Constructor	Description
LogicalPlanWithNullaryRootImpl(NullaryLogicalOp rootOp)

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.
NullaryLogicalOp	getRootOperator()	Returns the root operator of this plan.
LogicalPlan	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

LogicalPlanWithNullaryRootImpl

public LogicalPlanWithNullaryRootImpl(NullaryLogicalOp rootOp)

Method Details

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getRootOperator

public NullaryLogicalOp getRootOperator()

Description copied from interface: LogicalPlan

Returns the root operator of this plan.

Specified by:

getRootOperator in interface LogicalPlan

Specified by:

getRootOperator in interface LogicalPlanWithNullaryRoot

getExpectedVariables

public ExpectedVariables getExpectedVariables()

Description copied from interface: LogicalPlan

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

Specified by:

getExpectedVariables in interface LogicalPlan

numberOfSubPlans

public int numberOfSubPlans()

Description copied from interface: LogicalPlan

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 LogicalPlan

getSubPlan

public LogicalPlan getSubPlan(int i)
                       throws NoSuchElementException

Description copied from interface: LogicalPlan

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 LogicalPlan

Throws:

NoSuchElementException