Package tools.refinery.interpreter.matchers.planning.operations

Class POperation

java.lang.Object

tools.refinery.interpreter.matchers.planning.operations.POperation

Direct Known Subclasses:

PApply, PEnumerate, PJoin, PProject, PStart

public abstract class POperation
extends Object

Abstract superclass for representing a high-level query evaluation operation.

Subclasses correspond to various POperations modeled after relational algebra.

Constructor Summary

Constructors

Constructor	Description
POperation()

Method Summary

Modifier and Type	Method	Description
void	checkConsistency(SubPlan subPlan)	Checks whether this constraint can be properly applied at the given SubPlan.
abstract Set<? extends PConstraint>	getDeltaConstraints()	Newly enforced constraints
abstract String	getShortName()
abstract int	numParentSubPlans()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

POperation

public POperation()

Method Details

getDeltaConstraints

public abstract Set<? extends PConstraint> getDeltaConstraints()

Newly enforced constraints

getShortName

public abstract String getShortName()

numParentSubPlans

public abstract int numParentSubPlans()

Returns:

the number of SubPlans that must be specified as parents

checkConsistency

public void checkConsistency(SubPlan subPlan)

Checks whether this constraint can be properly applied at the given SubPlan.

toString

public String toString()

Overrides:

toString in class Object