org.btrplace.btrpsl.constraint.StringParam Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 University Nice Sophia Antipolis
 *
 * This file is part of btrplace.
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.btrplace.btrpsl.constraint;

import org.btrplace.btrpsl.element.BtrpOperand;
import org.btrplace.btrpsl.element.IgnorableOperand;
import org.btrplace.btrpsl.tree.BtrPlaceTree;

/**
 * A parameter for a constraint that denotes a String.
 *
 * @author Fabien Hermenier
 */
public class StringParam extends DefaultConstraintParam {

    /**
     * Make a new string parameter.
     *
     * @param n the parameter value
     */
    public StringParam(String n) {
        super(n, "string");
    }

    @Override
    public String transform(SatConstraintBuilder cb, BtrPlaceTree tree, BtrpOperand op) {
        if (op == IgnorableOperand.getInstance()) {
            throw new UnsupportedOperationException();
        }
        return op.toString();
    }

    @Override
    public boolean isCompatibleWith(BtrPlaceTree t, BtrpOperand o) {
        return o == IgnorableOperand.getInstance() || (o.type() == BtrpOperand.Type.STRING && o.degree() == 0);
    }
}