Package org.jacop.search
Class ActivityMin<T extends Var>
java.lang.Object
org.jacop.search.ActivityMin<T>
- Type Parameters:
T
- type of variable being compared.
- All Implemented Interfaces:
ComparatorVariable<T>
Defines a pruning activity comparatorfor variables. Every time a constraint
prunes a variable activity weight is increased by one. All other variables of
constraint's activity weight value is recalculated as activity weight * decay.
The comparator will choose the variable with the lowest activity
weight.
- Version:
- 4.8
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Constructor Summary
ConstructorsModifierConstructorDescriptionprivate
ActivityMin
(Store store) ActivityMin
(Store store, float decay) -
Method Summary
Modifier and TypeMethodDescriptionint
It compares the baseline metric to the variable metric.int
It compares the metric of the left variable against the right one.float
It returns the metric of the variable given according to the comparator.
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Constructor Details
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ActivityMin
private ActivityMin() -
ActivityMin
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ActivityMin
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Method Details
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compare
Description copied from interface:ComparatorVariable
It compares the baseline metric to the variable metric.- Specified by:
compare
in interfaceComparatorVariable<T extends Var>
- Parameters:
left
- the baseline for comparison.var
- variable which is compared to baseline.- Returns:
- 1 if metric is larger than variable, 0 if equal, -1 if baseline is smaller.
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compare
Description copied from interface:ComparatorVariable
It compares the metric of the left variable against the right one.- Specified by:
compare
in interfaceComparatorVariable<T extends Var>
- Parameters:
leftVar
- left variablerightVar
- right variable- Returns:
- 1 if metric for left variable is greater, 0 is they are equal, -1 if smaller.
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metric
Description copied from interface:ComparatorVariable
It returns the metric of the variable given according to the comparator.- Specified by:
metric
in interfaceComparatorVariable<T extends Var>
- Parameters:
var
- variable for which metric is computed.- Returns:
- the metric of the variable according to the comparator.
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