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author | 2020-11-02 02:02:40 +0100 | |
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committer | 2020-11-02 02:02:40 +0100 | |
commit | f06427cd7375551582461f91b3458339a8227f9b (patch) | |
tree | 97bc6ec85f4c384e5080a6611b492caf460b6ce9 /Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend | |
parent | Must unit propagation (diff) | |
download | VIATRA-Generator-f06427cd7375551582461f91b3458339a8227f9b.tar.gz VIATRA-Generator-f06427cd7375551582461f91b3458339a8227f9b.tar.zst VIATRA-Generator-f06427cd7375551582461f91b3458339a8227f9b.zip |
Optimizing generator with linear objective functions
Diffstat (limited to 'Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend')
-rw-r--r-- | Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend new file mode 100644 index 00000000..2434073d --- /dev/null +++ b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner/src/hu/bme/mit/inf/dslreasoner/viatrasolver/reasoner/optimization/CostObjectiveHint.xtend | |||
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1 | package hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.optimization | ||
2 | |||
3 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.BoundSaturationListener | ||
4 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.ExtendedLinearExpressionBuilder | ||
5 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.LinearTypeConstraintHint | ||
6 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.LinearTypeExpressionBuilderFactory | ||
7 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.PolyhedronExtensionOperator | ||
8 | import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.patterns.PatternGenerator | ||
9 | import java.util.Map | ||
10 | import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PQuery | ||
11 | import org.eclipse.xtend.lib.annotations.Accessors | ||
12 | |||
13 | abstract class CostObjectiveHint implements LinearTypeConstraintHint, BoundSaturationListener { | ||
14 | @Accessors ThreeValuedCostObjective objective | ||
15 | @Accessors IObjectiveBoundsProvider boundsProvider | ||
16 | |||
17 | Integer bestUpper = null | ||
18 | |||
19 | override getAdditionalPatterns(PatternGenerator patternGenerator, Map<String, PQuery> fqnToPQuery) { | ||
20 | '''''' | ||
21 | } | ||
22 | |||
23 | override createConstraintUpdater(LinearTypeExpressionBuilderFactory builderFactory) { | ||
24 | null | ||
25 | } | ||
26 | |||
27 | def isExact() { | ||
28 | false | ||
29 | } | ||
30 | |||
31 | def PolyhedronExtensionOperator createPolyhedronExtensionOperator( | ||
32 | Map<String, CostElementMatchers> costElementMatchers) { | ||
33 | null | ||
34 | } | ||
35 | |||
36 | def setObjective(ThreeValuedCostObjective objective) { | ||
37 | if (this.objective !== null) { | ||
38 | throw new IllegalStateException("Objective was already set") | ||
39 | } | ||
40 | this.objective = objective | ||
41 | } | ||
42 | |||
43 | def setBoundsProvider(IObjectiveBoundsProvider boundsProvider) { | ||
44 | if (this.boundsProvider !== null) { | ||
45 | throw new IllegalStateException("Objective bounds provider was already set") | ||
46 | } | ||
47 | this.boundsProvider = boundsProvider | ||
48 | } | ||
49 | |||
50 | protected def buildWithBounds(ExtendedLinearExpressionBuilder builder) { | ||
51 | val bounds = builder.build(this) | ||
52 | if (objective !== null && boundsProvider !== null) { | ||
53 | boundsProvider.computeRequiredBounds(objective, bounds) | ||
54 | } | ||
55 | if (exact && bestUpper !== null) { | ||
56 | bounds.tightenLowerBound(bestUpper) | ||
57 | } | ||
58 | bounds | ||
59 | } | ||
60 | |||
61 | override boundsSaturated(Integer lower, Integer upper) { | ||
62 | if (upper !== null && (bestUpper === null || bestUpper < upper)) { | ||
63 | bestUpper = upper | ||
64 | } | ||
65 | objective?.boundsSaturated(lower, upper) | ||
66 | } | ||
67 | |||
68 | } | ||