Class PhysicalPlanUtils

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.utils.PhysicalPlanUtils

public class PhysicalPlanUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
PhysicalPlanUtils()

Method Summary

Modifier and Type	Method	Description
static ExpectedVariables[]	getExpectedVariables(PhysicalPlan... plans)	Returns an array of the ExpectedVariables objects of all given physical plans, in the order in which the plans are given.
static Set<org.apache.jena.sparql.core.Var>	intersectionOfAllVariables(PhysicalPlan... plans)	Returns an intersection of the sets of all variables (certain and possible) in all the given plans.
static Set<org.apache.jena.sparql.core.Var>	intersectionOfCertainVariables(PhysicalPlan... plans)	Returns an intersection of the sets of certain variables in all the given plans.
static Set<org.apache.jena.sparql.core.Var>	intersectionOfPossibleVariables(PhysicalPlan... plans)	Returns an intersection of the sets of possible variables in all the given plans.
static Set<org.apache.jena.sparql.core.Var>	unionOfAllVariables(PhysicalPlan... plans)	Returns a set of all the variables (certain and possible) in all the given plans.
static Set<org.apache.jena.sparql.core.Var>	unionOfCertainVariables(PhysicalPlan plans)	Returns a set of all the certain variables in all the given plans.
static Set<org.apache.jena.sparql.core.Var>	unionOfPossibleVariables(PhysicalPlan... plans)	Returns a set of all the possible variables in all the given plans.

Methods inherited from class java.lang.Object

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

Constructor Details

PhysicalPlanUtils

public PhysicalPlanUtils()

Method Details

unionOfCertainVariables

public static Set<org.apache.jena.sparql.core.Var> unionOfCertainVariables(PhysicalPlan plans)

Returns a set of all the certain variables in all the given plans. Returns null if no plan is given.

unionOfPossibleVariables

public static Set<org.apache.jena.sparql.core.Var> unionOfPossibleVariables(PhysicalPlan... plans)

Returns a set of all the possible variables in all the given plans. Returns null if no plan is given.

unionOfAllVariables

public static Set<org.apache.jena.sparql.core.Var> unionOfAllVariables(PhysicalPlan... plans)

Returns a set of all the variables (certain and possible) in all the given plans. Returns null if no plan is given.

intersectionOfCertainVariables

public static Set<org.apache.jena.sparql.core.Var> intersectionOfCertainVariables(PhysicalPlan... plans)

Returns an intersection of the sets of certain variables in all the given plans. Returns null if no plan is given.

intersectionOfPossibleVariables

public static Set<org.apache.jena.sparql.core.Var> intersectionOfPossibleVariables(PhysicalPlan... plans)

Returns an intersection of the sets of possible variables in all the given plans. Returns null if no plan is given.

intersectionOfAllVariables

public static Set<org.apache.jena.sparql.core.Var> intersectionOfAllVariables(PhysicalPlan... plans)

Returns an intersection of the sets of all variables (certain and possible) in all the given plans. Returns null if no plan is given.

getExpectedVariables

public static ExpectedVariables[] getExpectedVariables(PhysicalPlan... plans)

Returns an array of the ExpectedVariables objects of all given physical plans, in the order in which the plans are given.