Class LogicalPlanWithNullaryRootImpl

java.lang.Object

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

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

All Implemented Interfaces:

QueryPlan, LogicalPlan, LogicalPlanWithNullaryRoot

public class LogicalPlanWithNullaryRootImpl
extends BaseForQueryPlan
implements LogicalPlanWithNullaryRoot

Field Summary

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

id

Constructor Summary

Constructors

Constructor	Description
LogicalPlanWithNullaryRootImpl(NullaryLogicalOp rootOp, Iterable<QueryPlanProperty> qpInfo)	Constructor.

Method Summary

Modifier and Type	Method	Description
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	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

LogicalPlanWithNullaryRootImpl

public LogicalPlanWithNullaryRootImpl(NullaryLogicalOp rootOp,
 Iterable<QueryPlanProperty> qpInfo)

Constructor.

Parameters:

rootOp - - the root operator of the plan to be created

qpInfo - - query-planning-related properties for a QueryPlanningInfo object for the plan to be created; may be null, in which case the plan does not get such an object initially

Method Details

getRootOperator

public NullaryLogicalOp getRootOperator()

Description copied from interface: QueryPlan

Returns the root operator of this plan.

Specified by:

getRootOperator in interface LogicalPlan

Specified by:

getRootOperator in interface LogicalPlanWithNullaryRoot

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 LogicalPlan 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 LogicalPlan

Specified by:

getSubPlan in interface QueryPlan

Throws:

NoSuchElementException