Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program 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.

 *

 * This program 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  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

/* Spatial Operations & Editing Tools for uDig

 * 

 * Axios Engineering under a funding contract with: 

 *      Diputación Foral de Gipuzkoa, Ordenación Territorial 

 *

 *      http://b5m.gipuzkoa.net

 *      http://www.axios.es 

 *

 * (C) 2006, Diputación Foral de Gipuzkoa, Ordenación Territorial (DFG-OT). 

 * DFG-OT agrees to licence under Lesser General Public License (LGPL).

 * 

 * 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; version 2.1 of the License.

 *

 * 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.

 */

package org.gvsig.editing.gui.cad.tools.split;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Location;

import com.vividsolutions.jts.geomgraph.Edge;

import com.vividsolutions.jts.geomgraph.Label;

import com.vividsolutions.jts.geomgraph.Position;

/**

 * A custom edge class that knows if its an edge from the shell of the polygin being splitted, one

 * of its holes or the splitting line, by inspecing its label.

 * 

 * @author Gabriel Roldán, Axios Engineering

 * @author Mauricio Pazos, Axios Engineering

 * @since 1.1.0

 */

final class SplitEdge extends Edge {

    SplitEdge( Coordinate[] pts, Label label ) {

        super(pts, label);

    }

    private int[] getLabelLocations() {

        int[] locations = new int[3];

        Label label = getLabel();

        locations[Position.ON] = label.getLocation(0, Position.ON);

        locations[Position.LEFT] = label.getLocation(0, Position.LEFT);

        locations[Position.RIGHT] = label.getLocation(0, Position.RIGHT);

        return locations;

    }

    public boolean isShellEdge() {

        int[] loc = getLabelLocations();

        return (loc[Position.LEFT] == Location.EXTERIOR && loc[Position.RIGHT] == Location.INTERIOR);

    }

    public boolean isHoleEdge() {

        int[] loc = getLabelLocations();

        return (loc[Position.LEFT] == Location.INTERIOR && loc[Position.RIGHT] == Location.EXTERIOR);

    }

    public boolean isInteriorEdge() {

        int[] loc = getLabelLocations();

        return (loc[Position.LEFT] == Location.INTERIOR && loc[Position.RIGHT] == Location.INTERIOR);

    }

    public String toString() {

        StringBuffer sb = new StringBuffer("Edge[label=");

        sb.append(getLabel()).append(", ");

        Coordinate[] coords = getCoordinates();

        for( int i = 0; i < coords.length; i++ ) {

            sb.append(coords[i].x).append(",").append(coords[i].y).append(" ");

        }

        sb.append("]");

        return sb.toString();

    }

}