Package org.jacop.constraints
Class Max
- java.lang.Object
-
- org.jacop.constraints.DecomposedConstraint<Constraint>
-
- org.jacop.constraints.Constraint
-
- org.jacop.constraints.Max
-
- All Implemented Interfaces:
SatisfiedPresent
public class Max extends Constraint implements SatisfiedPresent
Max constraint implements the Maximum/2 constraint. It provides the maximum variable from all variables on the list.max(list) = max.
- Version:
- 4.7
-
-
Field Summary
Fields Modifier and Type Field Description (package private) static java.util.concurrent.atomic.AtomicInteger
idNumber
(package private) int
l
It specifies length of the list.IntVar[]
list
It specifies a list of variables among which a maximum value is being searched for.IntVar
max
It specifies variable max which stores the maximum value present in the list.private TimeStamp<java.lang.Integer>
position
Defines first position of the variable that needs to be considered-
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
-
-
Method Summary
All 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)
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
-
list
public final IntVar[] list
It specifies a list of variables among which a maximum value is being searched for.
-
max
public final IntVar max
It specifies variable max which stores the maximum value present in the list.
-
l
final int l
It specifies length of the list.
-
position
private TimeStamp<java.lang.Integer> position
Defines first position of the variable that needs to be considered
-
-
Method Detail
-
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
-
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.
-
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.
-
toString
public java.lang.String toString()
Description copied from class:Constraint
It produces a string representation of a constraint state.- Overrides:
toString
in classConstraint
-
-