org.eclipse.incquery.runtime.matchers.planning.operations

Class POperation

java.lang.Object

org.eclipse.incquery.runtime.matchers.planning.operations.POperation

Direct Known Subclasses:

PApply, PEnumerate, PJoin, PProject, PStart

public abstract class POperation
extends java.lang.Object

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

Subclasses correspond to various POperations modeled after relational algebra.

Author:

Bergmann Gabor

Constructor Summary

Constructors

Constructor and Description
POperation()

Method Summary

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

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

POperation

public POperation()

Method Detail

getDeltaConstraints

public abstract java.util.Set<? extends PConstraint> getDeltaConstraints()

Newly enforced constraints

getShortName

public abstract java.lang.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 java.lang.String toString()

Overrides:

toString in class java.lang.Object