diff options
Diffstat (limited to 'Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/cardinality/AbstractPolyhedronSaturationOperator.xtend')
-rw-r--r-- | Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/cardinality/AbstractPolyhedronSaturationOperator.xtend | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/cardinality/AbstractPolyhedronSaturationOperator.xtend b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/cardinality/AbstractPolyhedronSaturationOperator.xtend new file mode 100644 index 00000000..94f97e94 --- /dev/null +++ b/Solvers/VIATRA-Solver/hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra/src/hu/bme/mit/inf/dslreasoner/viatrasolver/logic2viatra/cardinality/AbstractPolyhedronSaturationOperator.xtend | |||
@@ -0,0 +1,53 @@ | |||
1 | package hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality | ||
2 | |||
3 | import com.google.common.collect.ImmutableList | ||
4 | import org.eclipse.xtend.lib.annotations.Accessors | ||
5 | |||
6 | abstract class AbstractPolyhedronSaturationOperator implements PolyhedronSaturationOperator { | ||
7 | @Accessors val Polyhedron polyhedron | ||
8 | |||
9 | new(Polyhedron polyhedron) { | ||
10 | if (polyhedron.dimensions.empty) { | ||
11 | throw new IllegalArgumentException("Polyhedron must have at least one dimension.") | ||
12 | } | ||
13 | this.polyhedron = polyhedron | ||
14 | } | ||
15 | |||
16 | override saturate() { | ||
17 | if (polyhedron.expressionsToSaturate.empty) { | ||
18 | return PolyhedronSaturationResult.SATURATED | ||
19 | } | ||
20 | for (constraint : polyhedron.constraints) { | ||
21 | if (constraint.zero) { | ||
22 | if (constraint.lowerBound !== null && constraint.lowerBound > 0) { | ||
23 | return PolyhedronSaturationResult.EMPTY | ||
24 | } | ||
25 | if (constraint.upperBound !== null && constraint.upperBound < 0) { | ||
26 | return PolyhedronSaturationResult.EMPTY | ||
27 | } | ||
28 | } else { | ||
29 | if (constraint.lowerBound !== null && constraint.upperBound !== null && | ||
30 | constraint.upperBound < constraint.lowerBound) { | ||
31 | return PolyhedronSaturationResult.EMPTY | ||
32 | } | ||
33 | } | ||
34 | } | ||
35 | doSaturate() | ||
36 | } | ||
37 | |||
38 | protected def PolyhedronSaturationResult doSaturate() | ||
39 | |||
40 | protected def getNonTrivialConstraints() { | ||
41 | ImmutableList.copyOf(polyhedron.constraints.filter [ constraint | | ||
42 | (constraint.lowerBound !== null || constraint.upperBound !== null) && !constraint.zero | ||
43 | ]) | ||
44 | } | ||
45 | |||
46 | private static def isZero(LinearConstraint constraint) { | ||
47 | constraint.coefficients.values.forall[it == 0] | ||
48 | } | ||
49 | |||
50 | override close() throws Exception { | ||
51 | // Nothing to close by default. | ||
52 | } | ||
53 | } | ||