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package hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.optimization
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.BoundSaturationListener
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.ExtendedLinearExpressionBuilder
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.LinearTypeConstraintHint
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.LinearTypeExpressionBuilderFactory
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.PolyhedronExtensionOperator
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternGenerator
import java.util.Map
import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PQuery
import org.eclipse.xtend.lib.annotations.Accessors
abstract class CostObjectiveHint implements LinearTypeConstraintHint, BoundSaturationListener {
@Accessors ThreeValuedCostObjective objective
@Accessors IObjectiveBoundsProvider boundsProvider
Integer bestUpper = null
override getAdditionalPatterns(PatternGenerator patternGenerator, Map<String, PQuery> fqnToPQuery) {
''''''
}
override createConstraintUpdater(LinearTypeExpressionBuilderFactory builderFactory) {
null
}
def isExact() {
false
}
def PolyhedronExtensionOperator createPolyhedronExtensionOperator(
Map<String, CostElementMatchers> costElementMatchers) {
null
}
def setObjective(ThreeValuedCostObjective objective) {
if (this.objective !== null) {
throw new IllegalStateException("Objective was already set")
}
this.objective = objective
}
def setBoundsProvider(IObjectiveBoundsProvider boundsProvider) {
if (this.boundsProvider !== null) {
throw new IllegalStateException("Objective bounds provider was already set")
}
this.boundsProvider = boundsProvider
}
protected def buildWithBounds(ExtendedLinearExpressionBuilder builder) {
val bounds = builder.build(this)
if (objective !== null && boundsProvider !== null) {
boundsProvider.computeRequiredBounds(objective, bounds)
}
if (exact && bestUpper !== null) {
bounds.tightenLowerBound(bestUpper)
}
bounds
}
override boundsSaturated(Integer lower, Integer upper) {
if (upper !== null && (bestUpper === null || bestUpper < upper)) {
bestUpper = upper
}
objective?.boundsSaturated(lower, upper)
}
}
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