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package hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.optimization
import com.google.common.collect.ImmutableList
import java.util.Collection
import org.eclipse.viatra.dse.base.ThreadContext
class CompositeDirectionalThresholdObjective extends DirectionalThresholdObjective {
val Collection<DirectionalThresholdObjective> objectives
new(String name, Collection<DirectionalThresholdObjective> objectives) {
this(name, objectives, getKind(objectives), getThreshold(objectives), getLevel(objectives))
}
new(String name, DirectionalThresholdObjective... objectives) {
this(name, objectives as Collection<DirectionalThresholdObjective>)
}
protected new(String name, Iterable<DirectionalThresholdObjective> objectives, ObjectiveKind kind,
ObjectiveThreshold threshold, int level) {
super(name, kind, threshold, level)
this.objectives = ImmutableList.copyOf(objectives)
}
override createNew() {
new CompositeDirectionalThresholdObjective(name, objectives.map[createNew as DirectionalThresholdObjective],
kind, threshold, level)
}
override init(ThreadContext context) {
for (objective : objectives) {
objective.init(context)
}
}
override protected getRawFitness(ThreadContext context) {
var double fitness = 0
for (objective : objectives) {
fitness += objective.getFitness(context)
}
fitness
}
private static def getKind(Collection<DirectionalThresholdObjective> objectives) {
val kinds = objectives.map[kind].toSet
if (kinds.size != 1) {
throw new IllegalArgumentException("Passed objectives must have the same kind")
}
kinds.head
}
private static def getThreshold(Collection<DirectionalThresholdObjective> objectives) {
objectives.map[threshold].reduce[a, b|a.merge(b)]
}
private static def int getLevel(Collection<DirectionalThresholdObjective> objectives) {
val levels = objectives.map[level].toSet
if (levels.size != 1) {
throw new IllegalArgumentException("Passed objectives must have the same level")
}
levels.head
}
}
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