Class PhysicalOpMultiwayUnion.Factory

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.physical.impl.PhysicalOpMultiwayUnion.Factory

All Implemented Interfaces:

PhysicalOpFactory

Enclosing class:

PhysicalOpMultiwayUnion

public static class PhysicalOpMultiwayUnion.Factory
extends Object
implements PhysicalOpFactory

Constructor Summary

Constructors

Constructor	Description
Factory()

Method Summary

Modifier and Type	Method	Description
PhysicalOpMultiwayUnion	create(NaryLogicalOp lop)	Creates a physical operator for the given logical operator.
boolean	supports(LogicalOperator lop, ExpectedVariables... inputVars)	Returns true if this factory can create a physical operator for the given logical operator and expected input variables.

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.physical.PhysicalOpFactory

create, create, create

Constructor Details

Factory

public Factory()

Method Details

supports

public boolean supports(LogicalOperator lop,
 ExpectedVariables... inputVars)

Description copied from interface: PhysicalOpFactory

Returns true if this factory can create a physical operator for the given logical operator and expected input variables.

Specified by:

supports in interface PhysicalOpFactory

Parameters:

lop - the logical operator to check

inputVars - expected input variables

Returns:

true if this factory can handle the inputs; false otherwise

create

public PhysicalOpMultiwayUnion create(NaryLogicalOp lop)

Description copied from interface: PhysicalOpFactory

Creates a physical operator for the given logical operator.

Precondition: call only if

invalid @link

{@link #supports(...)

} has returned true for the same logical operator and input variables.

Specified by:

create in interface PhysicalOpFactory

Parameters:

lop - the logical operator

Returns:

a physical operator