Package org.jacop.constraints
Class ArgMin
- java.lang.Object
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- org.jacop.constraints.DecomposedConstraint<Constraint>
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- org.jacop.constraints.Constraint
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- org.jacop.constraints.ArgMin
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- All Implemented Interfaces:
SatisfiedPresent
public class ArgMin extends Constraint implements SatisfiedPresent
ArgMin constraint provides the index of the maximum variable from all variables on the list.- Version:
- 4.7
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Field Summary
Fields Modifier and Type Field Description (package private) boolean
firstConsistencyCheck
(package private) static java.util.concurrent.atomic.AtomicInteger
idNumber
int
indexOffset
It specifies indexOffset within an element constraint list[index-indexOffset] = value.IntVar[]
list
It specifies a list of variables among which a maximum value is being searched for.IntVar
minIndex
It specifies variable max which stores the maximum value present in the list.boolean
tiebreak
tirbreak == true --> select element with the lowest index if exist several-
Fields inherited from class org.jacop.constraints.Constraint
afcWeight, atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope, trace, watchedVariableGrounded
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Fields inherited from class org.jacop.constraints.DecomposedConstraint
queueIndex
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Constructor Summary
Constructors Constructor Description ArgMin(java.util.List<? extends IntVar> variables, IntVar minIndex)
ArgMin(java.util.List<? extends IntVar> variables, IntVar minIndex, int indexOffset, boolean tiebreak)
It constructs max constraint.ArgMin(IntVar[] list, IntVar minIndex)
ArgMin(IntVar[] list, IntVar minIndex, int indexOffset, boolean tiebreak)
It constructs max constraint.
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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()
boolean
satisfied()
It checks if the constraint is satisfied.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, impose, imposeDecomposition, increaseWeight, intArrayToString, long2int, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, toInt, toInt, updateAFC, watchedVariableGrounded
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Methods inherited from class org.jacop.constraints.DecomposedConstraint
auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition
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Field Detail
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idNumber
static final java.util.concurrent.atomic.AtomicInteger idNumber
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firstConsistencyCheck
boolean firstConsistencyCheck
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list
public final IntVar[] list
It specifies a list of variables among which a maximum value is being searched for.
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minIndex
public final IntVar minIndex
It specifies variable max which stores the maximum value present in the list.
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indexOffset
public int indexOffset
It specifies indexOffset within an element constraint list[index-indexOffset] = value.
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tiebreak
public boolean tiebreak
tirbreak == true --> select element with the lowest index if exist several
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Constructor Detail
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ArgMin
public ArgMin(IntVar[] list, IntVar minIndex, int indexOffset, boolean tiebreak)
It constructs max constraint.- Parameters:
minIndex
- variable denoting the index of the maximum valuelist
- the array of variables for which the index of the maximum value is imposed.indexOffset
- the offset for the index that is computed from 1 by default (if needed from 0, use -1 for this parameter)tiebreak
- defines if tie breaking should be used (returning the least index if several maximum elements
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ArgMin
public ArgMin(java.util.List<? extends IntVar> variables, IntVar minIndex, int indexOffset, boolean tiebreak)
It constructs max constraint.- Parameters:
minIndex
- variable denoting the index of minimum valuevariables
- the array of variables for which the minimum value is imposed.indexOffset
- the offset for the index that is computed from 1 by default (if needed from 0, use -1 for this parameter)tiebreak
- defines if tie breaking sgould be used (returning the least index if several maximum elements
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Method Detail
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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.
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getDefaultConsistencyPruningEvent
public int getDefaultConsistencyPruningEvent()
- Specified by:
getDefaultConsistencyPruningEvent
in classConstraint
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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.
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toString
public java.lang.String toString()
Description copied from class:Constraint
It produces a string representation of a constraint state.- Overrides:
toString
in classConstraint
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