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Commitf506865

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committed
Added DecisionGraph and ~Node
in anticipation of CDCLSolver
1 parent8508c68 commitf506865

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2 files changed

+84
-0
lines changed

2 files changed

+84
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packagebool.variant.cnf.interpreter.confictGraph;
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importbool.variant.cnf.parser.cnfnode.AbstractVariable;
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importbool.variant.cnf.parser.cnfnode.Clause;
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importbool.variant.cnf.parser.cnfnode.Variable;
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importjava.io.Serial;
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importjava.util.ArrayList;
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importjava.util.Map;
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publicclassDecisionGraphextendsArrayList<DecisionGraphNode> {
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@Serial
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privatestaticfinallongserialVersionUID = -71482563341139446L;
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publicbooleancontains(AbstractVariablevar) {
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returnstream().anyMatch(node ->node.contains(var));
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}
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publicvoiddecide(AbstractVariabledecision) {
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add(newDecisionGraphNode(decision));
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}
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privatevoidderiveDecision(Map<Variable,Boolean>assignments,ClausetoDecide) {
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getLast().deriveDecision(assignments,toDecide);
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}
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}
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packagebool.variant.cnf.interpreter.confictGraph;
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importbool.variant.cnf.parser.cnfnode.AbstractVariable;
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importbool.variant.cnf.parser.cnfnode.Clause;
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importbool.variant.cnf.parser.cnfnode.Variable;
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importutil.Pair;
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importjava.io.Serial;
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importjava.util.ArrayList;
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importjava.util.List;
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importjava.util.Map;
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importjava.util.stream.Collectors;
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/** Pair<Decision, List<Reasons>> */
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publicclassDecisionGraphNodeextendsArrayList<Pair<AbstractVariable,List<AbstractVariable>>> {
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@Serial
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privatestaticfinallongserialVersionUID = -3326289578466580792L;
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publicDecisionGraphNode(AbstractVariabledecision) {
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add(Pair.of(decision,List.of()));
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}
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publicbooleancontains(AbstractVariablevar) {
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returnstream()
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.map(pair ->pair.left)
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.anyMatch(v ->v.equals(var));
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}
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publicList<Variable>getDecisionVariables() {
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returnstream()
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.map(pair ->pair.left.getVariable())
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.toList();
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}
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publicList<Clause>getConflictClauses() {
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returnstream()
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.map(decisions ->decisions.right.stream()
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.map(AbstractVariable::negated)
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.toList())
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.map(Clause::new)
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.toList();
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}
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publicvoidderiveDecision(Map<Variable,Boolean>assignments,ClausetoDecide) {
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AbstractVariabledecision =toDecide.getDecidable(assignments);
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add(Pair.of(decision,
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toDecide.stream()
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.filter(var ->var !=decision)
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.toList()));
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}
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@Override
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publicStringtoString() {
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returnstream()
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.map(Object::toString)
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.collect(Collectors.joining(" -> "));
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}
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}

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