org.locationtech.jts.geomgraph.Position Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 Vivid Solutions.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */
package org.locationtech.jts.geomgraph;

/**
 * A Position indicates the position of a Location relative to a graph component
 * (Node, Edge, or Area).
 * @version 1.7
 */
public class Position {

  /** An indicator that a Location is on a GraphComponent */
  public static final int ON      = 0;
  /** An indicator that a Location is to the left of a GraphComponent */  
  public static final int LEFT    = 1;
  /** An indicator that a Location is to the right of a GraphComponent */  
  public static final int RIGHT   = 2;
  /**
   * Returns LEFT if the position is RIGHT, RIGHT if the position is LEFT, or the position
   * otherwise.
   */
  public static final int opposite(int position)
  {
    if (position == LEFT) return RIGHT;
    if (position == RIGHT) return LEFT;
    return position;
  }
}