Package org.jacop.constraints
Class Channel
- java.lang.Object
-
- org.jacop.constraints.DecomposedConstraint<Constraint>
-
- org.jacop.constraints.Constraint
-
- org.jacop.constraints.Channel
-
- All Implemented Interfaces:
SatisfiedPresent
public class Channel extends Constraint implements SatisfiedPresent
Channel constraints "constraint" <=> B- Version:
- 4.8
-
-
Nested Class Summary
Nested Classes Modifier and Type Class Description (package private) static class
Channel.Item
-
Field Summary
Fields Modifier and Type Field Description (package private) static java.util.concurrent.atomic.AtomicInteger
idNumber
(package private) Channel.Item[]
item
It specifies variables b and related values for variable x.(package private) int
n
length of vector bsprivate TimeStamp<java.lang.Integer>
position
(package private) java.util.Map<java.lang.Integer,IntVar>
valueMap
IntVar
x
Variables that is checked for a value.-
Fields inherited from class org.jacop.constraints.Constraint
afcWeight, atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace, watchedVariableGrounded
-
Fields inherited from class org.jacop.constraints.DecomposedConstraint
queueIndex
-
-
Constructor Summary
Constructors Constructor Description Channel(IntVar x, java.util.Map<java.lang.Integer,IntVar> bs)
Channel(IntVar x, IntVar[] bs)
Channel(IntVar x, IntVar[] bs, int[] value)
It creates Channel constraint.Channel(IntVar x, IntVar[] bs, IntDomain value)
It creates Channel constraint.
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
consistency(Store store)
It is a (most probably incomplete) consistency function which removes the values from variables domains.int
getDefaultConsistencyPruningEvent()
void
impose(Store store)
It imposes the constraint in a given store.boolean
satisfied()
It checks if the constraint is satisfied.private void
swap(int i, int j)
(package private) static int[]
toArray(IntDomain d)
java.lang.String
toString()
It produces a string representation of a constraint state.-
Methods inherited from class org.jacop.constraints.Constraint
afc, arguments, cleanAfterFailure, decompose, getConsistencyPruningEvent, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, impose, imposeDecomposition, increaseWeight, intArrayToString, long2int, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, toInt, toInt, updateAFC, watchedVariableGrounded
-
Methods inherited from class org.jacop.constraints.DecomposedConstraint
auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition
-
-
-
-
Field Detail
-
idNumber
static final java.util.concurrent.atomic.AtomicInteger idNumber
-
x
public final IntVar x
Variables that is checked for a value.
-
n
final int n
length of vector bs
-
item
final Channel.Item[] item
It specifies variables b and related values for variable x.
-
position
private TimeStamp<java.lang.Integer> position
-
valueMap
java.util.Map<java.lang.Integer,IntVar> valueMap
-
-
Constructor Detail
-
Channel
public Channel(IntVar x, IntVar[] bs, int[] value)
It creates Channel constraint.- Parameters:
x
- variable to be checked.bs
- array representing the status of equality x = i.value
- array of values that are checked against x.
-
Channel
public Channel(IntVar x, IntVar[] bs, IntDomain value)
It creates Channel constraint.- Parameters:
x
- variable to be checked.bs
- array representing the status of equality x = i.value
- set of values that are checked against x.
-
-
Method Detail
-
toArray
static int[] toArray(IntDomain d)
-
consistency
public void consistency(Store store)
Description copied from class:Constraint
It is a (most probably incomplete) consistency function which removes the values from variables domains. Only values which do not have any support in a solution space are removed.- Specified by:
consistency
in classConstraint
- Parameters:
store
- constraint store within which the constraint consistency is being checked.
-
swap
private void swap(int i, int j)
-
getDefaultConsistencyPruningEvent
public int getDefaultConsistencyPruningEvent()
- Specified by:
getDefaultConsistencyPruningEvent
in classConstraint
-
satisfied
public boolean satisfied()
Description copied from interface:SatisfiedPresent
It checks if the constraint is satisfied. It can return false even if constraint is satisfied but not all variables in its scope are grounded. It needs to return true if all variables in its scope are grounded and constraint is satisfied.Implementations of this interface for constraints that are not PrimitiveConstraint may require constraint imposition and consistency check as a requirement to work correctly.
- Specified by:
satisfied
in interfaceSatisfiedPresent
- Returns:
- true if constraint is possible to verify that it is satisfied.
-
impose
public void impose(Store store)
Description copied from class:Constraint
It imposes the constraint in a given store.- Overrides:
impose
in classConstraint
- Parameters:
store
- the constraint store to which the constraint is imposed to.
-
toString
public java.lang.String toString()
Description copied from class:Constraint
It produces a string representation of a constraint state.- Overrides:
toString
in classConstraint
-
-