org.drools.spi
Interface Constraint

All Superinterfaces:

java.lang.Cloneable, RuleComponent, java.io.Serializable

All Known Subinterfaces:

AlphaNodeFieldConstraint, BetaNodeFieldConstraint

All Known Implementing Classes:

AbstractCompositeConstraint, AndConstraint, InstanceEqualsConstraint, InstanceNotEqualsConstraint, LiteralConstraint, MultiRestrictionFieldConstraint, MutableTypeConstraint, OrConstraint, PredicateConstraint, ReturnValueConstraint, TupleStartEqualsConstraint, VariableConstraint

public interface Constraint
extends RuleComponent, java.lang.Cloneable

Nested Class Summary

static class

Constraint.ConstraintType A java 1.4 type-safe enum

Method Summary

java.lang.Object	clone() Clones the constraint
Declaration[]	getRequiredDeclarations() Returns all the declarations required by the given constraint implementation.
Constraint.ConstraintType	getType() Returns the type of the constraint, either ALPHA, BETA or UNKNOWN
void	replaceDeclaration(Declaration oldDecl, Declaration newDecl) A constraint may be required to replace an old declaration object by a new updated one

Method Detail

getRequiredDeclarations

Declaration[] getRequiredDeclarations()

Returns all the declarations required by the given constraint implementation.

Returns:

replaceDeclaration

void replaceDeclaration(Declaration oldDecl,
                        Declaration newDecl)

A constraint may be required to replace an old declaration object by a new updated one

Parameters:

oldDecl -

newDecl -

clone

java.lang.Object clone()

Clones the constraint

Returns:

getType

Constraint.ConstraintType getType()

Returns the type of the constraint, either ALPHA, BETA or UNKNOWN

Returns: