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package hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.optimization
import java.util.Comparator
import org.eclipse.viatra.dse.base.ThreadContext
import org.eclipse.xtend.lib.annotations.Accessors
import org.eclipse.xtend.lib.annotations.Data
abstract class ObjectiveThreshold {
public static val NO_THRESHOLD = new hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.optimization.ObjectiveThreshold {
override isHard() {
false
}
override satisfiesThreshold(double cost, Comparator<Double> comparator) {
true
}
}
private new() {
}
def boolean isHard() {
true
}
def boolean satisfiesThreshold(double cost, Comparator<Double> comparator)
@Data
static class Exclusive extends ObjectiveThreshold {
val double threshold
override satisfiesThreshold(double cost, Comparator<Double> comparator) {
comparator.compare(threshold, cost) > 0
}
}
@Data
static class Inclusive extends ObjectiveThreshold {
val double threshold
override satisfiesThreshold(double cost, Comparator<Double> comparator) {
comparator.compare(threshold, cost) >= 0
}
}
}
abstract class AbstractThreeValuedObjective implements IThreeValuedObjective {
@Accessors val String name
@Accessors ObjectiveKind kind
@Accessors ObjectiveThreshold threshold
@Accessors int level
protected new(String name, ObjectiveKind kind, ObjectiveThreshold threshold, int level) {
this.name = name
this.kind = kind
this.threshold = threshold
this.level = level
}
abstract def double getLowestPossibleFitness(ThreadContext threadContext)
abstract def double getHighestPossibleFitness(ThreadContext threadContext)
override getWorstPossibleFitness(ThreadContext threadContext) {
switch (kind) {
case LOWER_IS_BETTER:
getHighestPossibleFitness(threadContext)
case HIGHER_IS_BETTER:
getLowestPossibleFitness(threadContext)
default:
throw new IllegalStateException("Unknown three valued objective kind: " + kind)
}
}
override getBestPossibleFitness(ThreadContext threadContext) {
switch (kind) {
case LOWER_IS_BETTER:
getLowestPossibleFitness(threadContext)
case HIGHER_IS_BETTER:
getHighestPossibleFitness(threadContext)
default:
throw new IllegalStateException("Unknown three valued objective kind: " + kind)
}
}
override isHardObjective() {
threshold.hard
}
override satisifiesHardObjective(Double fitness) {
threshold.satisfiesThreshold(fitness, comparator)
}
override getComparator() {
kind.comparator
}
override setComparator(Comparator<Double> comparator) {
kind = ObjectiveKind.fromComparator(comparator)
}
}
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