javax.constraints.impl
Class AbstractConstraint

java.lang.Object
  javax.constraints.impl.CommonBase
      javax.constraints.impl.AbstractConstraint

All Implemented Interfaces:

Constraint

Direct Known Subclasses:

ConstraintElementAtOnSets, ConstraintFalse, ConstraintGlobalCardinality, ConstraintMax, ConstraintMin, ConstraintNotAllEqual, ConstraintTable, ConstraintTraceVar, ConstraintTrue

public abstract class AbstractConstraint
extends CommonBase
implements Constraint

This is a base implementation for all

Constructor Summary

AbstractConstraint(Problem problem)

AbstractConstraint(Problem problem, java.lang.String name)

Method Summary

Constraint	and(Constraint c) Returns an "AND" Constraint.
VarBool	asBool() This method returns a Var variable that is equal 1 if the constraint is satisfied and equals 0 if it is violated.
Constraint	implies(Constraint c) Returns a Constraint that states the implication: this => c.
Constraint	negation() Returns a Constraint that is satisfied if and only if this constraint is not satisfied.
Constraint	or(Constraint c) Returns an "OR" Constraint.
void	post() This method takes a constraint's implementation and uses its own RI-specific post-method.
void	post(ConsistencyLevel consistencyLevel) This method is used to post the constraint.

Methods inherited from class javax.constraints.impl.CommonBase

getImpl, getName, getObject, getProblem, setImpl, setName, setObject

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.constraints.Constraint

getImpl, getName, getObject, getProblem, setImpl, setName, setObject

Constructor Detail

AbstractConstraint

public AbstractConstraint(Problem problem)

AbstractConstraint

public AbstractConstraint(Problem problem,
                          java.lang.String name)

Method Detail

and

public Constraint and(Constraint c)

Returns an "AND" Constraint. The Constraint "AND" is satisfied if both of the Constraints "this" and "c" are satisfied. The Constraint "AND" is not satisfied if at least one of the Constraints "this" or "c" is not satisfied.

Specified by:

and in interface Constraint

Parameters:

c - the Constraint which is part of the new "AND" Constraint

Returns:

a Constraint "AND" between the Constraints "this" and "c2".

asBool

public VarBool asBool()

This method returns a Var variable that is equal 1 if the constraint is satisfied and equals 0 if it is violated. Each constraint that participates in logical expressions should implement this method.

Specified by:

asBool in interface Constraint

Returns:

Var with a domain [0;1]: a 1 value indicates the constraint is satisfied, a 0 value indicates the constraint is violated.

implies

public Constraint implies(Constraint c)

Returns a Constraint that states the implication: this => c. In other words, if this constraint is satisfied, then constraint "c" should also be satisfied.

Specified by:

implies in interface Constraint

Parameters:

c - the Constraint in the implication.

Returns:

a Constraint that means this => c (if this then c).

negation

public Constraint negation()

Returns a Constraint that is satisfied if and only if this constraint is not satisfied.

Specified by:

negation in interface Constraint

Returns:

a Constraint that is satisfied if and only if this constraint is not satisfied.

or

public Constraint or(Constraint c)

Returns an "OR" Constraint. The Constraint "OR" is satisfied if either of the Constraints "this" and "c" is satisfied. The Constraint "OR" is not satisfied if both of the Constraints "this" and "c" are not satisfied.

Specified by:

or in interface Constraint

Parameters:

c - the Constraint which is part of the new "OR" Constraint

Returns:

a Constraint "OR" between the Constraints "this" and "c".

post

public void post()

This method takes a constraint's implementation and uses its own RI-specific post-method.

Specified by:

post in interface Constraint

Throws:

java.lang.RuntimeException - if a failure happened during the posting

post

public void post(ConsistencyLevel consistencyLevel)

This method is used to post the constraint. Additionally to post() this methods specifies a particular level of consistency that will be selected by an implementation to control the propagation strength of this constraint. If this method is not overloaded by an implementation, it will work as a post().

Specified by:

post in interface Constraint

Parameters:

consistencyLevel -

Throws:

java.lang.RuntimeException - if a failure happened during the posting