Package org.jacop.search
Class WeightedDegree<T extends Var>
java.lang.Object
org.jacop.search.WeightedDegree<T>
- Type Parameters:
T
- type of variable being compared.
- All Implemented Interfaces:
ComparatorVariable<T>
Defines a WeightedDegree comparator for variables. Every time a constraint
failure is encountered all variables within the scope of that constraints
have increased weight. The comparator will choose the variable with the
highest weight divided by its size.
This implementation is not equivalent to AFCMaxDeg since it takes
all accumulated failures for a variable while AFCMaxDeg sums up
weights for still active constraints only!
- Version:
- 4.8
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Constructor Summary
Constructors -
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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WeightedDegree
private WeightedDegree() -
WeightedDegree
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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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