subprojects/store-reasoning/src/main/java/tools/refinery/store/reasoning/rule/RelationRefinementAction.java


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/*
 * SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package tools.refinery.store.reasoning.rule;

import tools.refinery.store.reasoning.ReasoningAdapter;
import tools.refinery.store.reasoning.representation.PartialRelation;
import tools.refinery.store.model.Model;
import tools.refinery.store.query.term.Variable;
import tools.refinery.store.representation.TruthValue;
import tools.refinery.store.tuple.Tuple;

import java.util.List;

public record RelationRefinementAction(PartialRelation target, List<Variable> arguments, TruthValue value)
		implements RuleAction {
	public RelationRefinementAction {
		if (arguments.size() != target.arity()) {
			throw new IllegalArgumentException("%s needs %d parameters, but got %s".formatted(target.name(),
					target.arity(), arguments.size()));
		}
		if (value == TruthValue.UNKNOWN) {
			throw new IllegalArgumentException("Refining with UNKNOWN has no effect");
		}
	}

	@Override
	public RuleActionExecutor createExecutor(int[] argumentIndices, Model model) {
		var targetInterpretation = model.getAdapter(ReasoningAdapter.class).getPartialInterpretation(target);
		return activationTuple -> {
			int arity = argumentIndices.length;
			var arguments = new int[arity];
			for (int i = 0; i < arity; i++) {
				arguments[i] = activationTuple.get(argumentIndices[i]);
			}
			return targetInterpretation.merge(Tuple.of(arguments), value);
		};
	}
}