

/*
 * The JTS Topology Suite is a collection of Java classes that
 * implement the fundamental operations required to validate a given
 * geo-spatial data set to a known topological specification.
 *
 * Copyright (C) 2001 Vivid Solutions
 *
 * 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 2.1 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * For more information, contact:
 *
 *     Vivid Solutions
 *     Suite #1A
 *     2328 Government Street
 *     Victoria BC  V8T 5G5
 *     Canada
 *
 *     (250)385-6040
 *     www.vividsolutions.com
 */
package com.vividsolutions.jts.geom;

/**
 * Provides constants representing the dimensions of a point, a curve and a surface.
 * Also provides constants representing the dimensions of the empty geometry and
 * non-empty geometries, and the wildcard constant {@link #DONTCARE} meaning "any dimension".
 * These constants are used as the entries in {@link IntersectionMatrix}s.
 * 
 * @version 1.7
 */
public class Dimension {

  /**
   *  Dimension value of a point (0).
   */
  public final static int P = 0;

  /**
   *  Dimension value of a curve (1).
   */
  public final static int L = 1;

  /**
   *  Dimension value of a surface (2).
   */
  public final static int A = 2;

  /**
   *  Dimension value of the empty geometry (-1).
   */
  public final static int FALSE = -1;

  /**
   *  Dimension value of non-empty geometries (= {P, L, A}).
   */
  public final static int TRUE = -2;

  /**
   *  Dimension value for any dimension (= {FALSE, TRUE}).
   */
  public final static int DONTCARE = -3;

  /**
   *  Converts the dimension value to a dimension symbol, for example, <code>TRUE => 'T'</code>
   *  .
   *
   *@param  dimensionValue  a number that can be stored in the <code>IntersectionMatrix</code>
   *      . Possible values are <code>{TRUE, FALSE, DONTCARE, 0, 1, 2}</code>.
   *@return                 a character for use in the string representation of
   *      an <code>IntersectionMatrix</code>. Possible values are <code>{T, F, * , 0, 1, 2}</code>
   *      .
   */
  public static char toDimensionSymbol(int dimensionValue) {
    switch (dimensionValue) {
      case FALSE:
        return 'F';
      case TRUE:
        return 'T';
      case DONTCARE:
        return '*';
      case P:
        return '0';
      case L:
        return '1';
      case A:
        return '2';
    }
    throw new IllegalArgumentException("Unknown dimension value: " + dimensionValue);
  }

  /**
   *  Converts the dimension symbol to a dimension value, for example, <code>'*' => DONTCARE</code>
   *  .
   *
   *@param  dimensionSymbol  a character for use in the string representation of
   *      an <code>IntersectionMatrix</code>. Possible values are <code>{T, F, * , 0, 1, 2}</code>
   *      .
   *@return a number that can be stored in the <code>IntersectionMatrix</code>
   *      . Possible values are <code>{TRUE, FALSE, DONTCARE, 0, 1, 2}</code>.
   */
  public static int toDimensionValue(char dimensionSymbol) {
    switch (Character.toUpperCase(dimensionSymbol)) {
      case 'F':
        return FALSE;
      case 'T':
        return TRUE;
      case '*':
        return DONTCARE;
      case '0':
        return P;
      case '1':
        return L;
      case '2':
        return A;
    }
    throw new IllegalArgumentException("Unknown dimension symbol: " + dimensionSymbol);
  }
}


