diff options
Diffstat (limited to 'Domains/hu.bme.mit.inf.dslreasoner.domains.satellite/src/hu/bme/mit/inf/dslreasoner/domains/satellite/mdeo/MetricBasedGuidanceFunction.xtend')
-rw-r--r-- | Domains/hu.bme.mit.inf.dslreasoner.domains.satellite/src/hu/bme/mit/inf/dslreasoner/domains/satellite/mdeo/MetricBasedGuidanceFunction.xtend | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Domains/hu.bme.mit.inf.dslreasoner.domains.satellite/src/hu/bme/mit/inf/dslreasoner/domains/satellite/mdeo/MetricBasedGuidanceFunction.xtend b/Domains/hu.bme.mit.inf.dslreasoner.domains.satellite/src/hu/bme/mit/inf/dslreasoner/domains/satellite/mdeo/MetricBasedGuidanceFunction.xtend new file mode 100644 index 00000000..1529794f --- /dev/null +++ b/Domains/hu.bme.mit.inf.dslreasoner.domains.satellite/src/hu/bme/mit/inf/dslreasoner/domains/satellite/mdeo/MetricBasedGuidanceFunction.xtend | |||
@@ -0,0 +1,47 @@ | |||
1 | package hu.bme.mit.inf.dslreasoner.domains.satellite.mdeo | ||
2 | |||
3 | import org.eclipse.viatra.query.runtime.api.IPatternMatch | ||
4 | import org.eclipse.viatra.query.runtime.api.IQuerySpecification | ||
5 | import org.eclipse.viatra.query.runtime.api.ViatraQueryMatcher | ||
6 | import uk.ac.kcl.inf.mdeoptimiser.libraries.core.optimisation.IGuidanceFunction | ||
7 | import uk.ac.kcl.inf.mdeoptimiser.libraries.core.optimisation.interpreter.guidance.Solution | ||
8 | |||
9 | abstract class MetricBasedGuidanceFunction implements IGuidanceFunction { | ||
10 | val IQuerySpecification<? extends ViatraQueryMatcher<? extends IPatternMatch>> querySpecification | ||
11 | |||
12 | protected new(IQuerySpecification<? extends ViatraQueryMatcher<? extends IPatternMatch>> querySpecification) { | ||
13 | this.querySpecification = querySpecification | ||
14 | if (querySpecification.parameters.size != 1) { | ||
15 | throw new IllegalArgumentException("Metric must have a single parameter") | ||
16 | } | ||
17 | } | ||
18 | |||
19 | override computeFitness(Solution model) { | ||
20 | val value = getMetricValue(model) | ||
21 | computeFitness(value) | ||
22 | } | ||
23 | |||
24 | protected def double computeFitness(double metricValue) { | ||
25 | metricValue | ||
26 | } | ||
27 | |||
28 | private def getMetricValue(Solution solution) { | ||
29 | val model = solution.model | ||
30 | val queryEngine = LocalSearchEngineManager.INSTANCE.getEngine(model) | ||
31 | val matcher = querySpecification.getMatcher(queryEngine) | ||
32 | val iterator = matcher.allMatches.iterator | ||
33 | if (!iterator.hasNext) { | ||
34 | throw new IllegalStateException("Too few matches") | ||
35 | } | ||
36 | val objectValue = iterator.next.get(0) | ||
37 | if (objectValue instanceof Number) { | ||
38 | val doubleValue = objectValue.doubleValue | ||
39 | if (iterator.hasNext) { | ||
40 | throw new IllegalStateException("Too many matches") | ||
41 | } | ||
42 | doubleValue | ||
43 | } else { | ||
44 | throw new IllegalStateException("Metric value must be a number") | ||
45 | } | ||
46 | } | ||
47 | } | ||