org.chocosolver.parser.flatzinc.ast.constraints.ArrayBoolAndBuilder Maven / Gradle / Ivy

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/*
 * Copyright (c) 1999-2012, Ecole des Mines de Nantes
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Ecole des Mines de Nantes nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.chocosolver.parser.flatzinc.ast.constraints;

import org.chocosolver.parser.flatzinc.ast.Datas;
import org.chocosolver.parser.flatzinc.ast.expression.EAnnotation;
import org.chocosolver.parser.flatzinc.ast.expression.Expression;
import org.chocosolver.solver.Solver;
import org.chocosolver.solver.constraints.SatFactory;
import org.chocosolver.solver.variables.BoolVar;

import java.util.List;

/**
 * (∀ i ∈ 1..N: as[i]) ⇔ r where n is the length of as
 * 

 *
 * @author Charles Prud'homme
 * @since 26/01/11
 */
public class ArrayBoolAndBuilder implements IBuilder {
    @Override
    public void build(Solver solver, String name, List exps, List annotations, Datas datas) {
        BoolVar[] as = exps.get(0).toBoolVarArray(solver);
        BoolVar r = exps.get(1).boolVarValue(solver);
        if (as.length > 0) {

            switch (as.length) {
                case 0:
                    break;
                /*case 1:
                    solver.post(ICF.arithm(as[0], "=", r));
                    break;
                case 2:
                    ICF.arithm(as[0], "+", as[1], ">", 1).reifyWith(r);
                    break;*/
                default:
                    if (r.isInstantiatedTo(0)) {
                        SatFactory.addBoolAndArrayEqualFalse(as);
                    } else {
                        SatFactory.addBoolAndArrayEqVar(as, r);
                    }
                    break;
            }
        }
    }
}