Grid_Generator.java

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/* Grid Generator Java class declaration and implementation.
   Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
   Copyright (C) 2010-2016 BUGSENG srl (http://bugseng.com)

This file is part of the Parma Polyhedra Library (PPL).

The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The PPL 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 General Public License
for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.

For the most up-to-date information see the Parma Polyhedra Library
site: http://bugseng.com/products/ppl/ . */

package parma_polyhedra_library;

import javax.management.RuntimeErrorException;


public class Grid_Generator {

    private Grid_Generator_Type gt;

    private Linear_Expression le;

    private Coefficient div;

    private Grid_Generator(Linear_Expression e, Coefficient d,
                           Grid_Generator_Type generator_type) {
        le = e.clone();
        div = new Coefficient(d);
        gt = generator_type;
    }


    public static Grid_Generator grid_line(Linear_Expression e) {
        return new Grid_Generator(e, new Coefficient(0),
                                  Grid_Generator_Type.LINE);
    }


    public static Grid_Generator parameter(Linear_Expression e,
                                           Coefficient d) {
        return new Grid_Generator(e, d, Grid_Generator_Type.PARAMETER);
    }


    public static Grid_Generator grid_point(Linear_Expression e,
                                            Coefficient d) {
        return new Grid_Generator(e, d, Grid_Generator_Type.POINT);
    }

    public Grid_Generator_Type type() {
        return gt;
    }

    public Linear_Expression linear_expression() {
        return le;
    }


    public Coefficient divisor() {
        if (this.gt != Grid_Generator_Type.LINE)
            return div;
        Error cause = new Error("parma_polyhedra_library."
                                + "Grid_Generator::divisor:\n"
                                + "this is neither a grid point"
                                + " nor a parameter.");
        throw new RuntimeErrorException(cause);
    }

    public native String ascii_dump();

    public native String toString();

    private static native void initIDs();
    static {
        initIDs();
    }
}