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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
import org.eclipse.viatra.query.runtime.api.IPatternMatch
import org.eclipse.viatra.query.runtime.api.IQuerySpecification
import org.eclipse.viatra.query.runtime.api.ViatraQueryMatcher
import org.eclipse.xtend.lib.annotations.Data
@Data
class MatchCostElement {
val IQuerySpecification<? extends ViatraQueryMatcher<? extends IPatternMatch>> querySpecification
val double weight
}
class MatchCostObjective extends DirectionalThresholdObjective {
val Collection<MatchCostElement> costElements
Collection<CostElementMatcher> matchers
new(String name, Collection<MatchCostElement> costElements, ObjectiveKind kind, ObjectiveThreshold threshold,
int level) {
super(name, kind, threshold, level)
this.costElements = costElements
}
override createNew() {
new MatchCostObjective(name, costElements, kind, threshold, level)
}
override init(ThreadContext context) {
val queryEngine = context.queryEngine
matchers = ImmutableList.copyOf(costElements.map [
val matcher = querySpecification.getMatcher(queryEngine)
new CostElementMatcher(matcher, weight)
])
}
override protected getRawFitness(ThreadContext context) {
var double cost = 0
for (it : matchers) {
cost += weight * matcher.countMatches
}
cost
}
@Data
private static class CostElementMatcher {
val ViatraQueryMatcher<? extends IPatternMatch> matcher
val double weight
}
}
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