/**
 *  This file is part of miniCDx benchmark of oSCJ.
 *
 *   miniCDx 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.
 *
 *   miniCDx 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 miniCDx.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *   Copyright 2009, 2010
 *   @authors  Daniel Tang, Ales Plsek
 *   Revised by Kun Wei
 *
 *   See: http://sss.cs.purdue.edu/projects/oscj/
 */
package cdx;

/**
 * The class CallSign encodes call signs. They are used to identify aircrafts.
 */
public class CallSign {
  final private byte[] sign;

  public CallSign(final byte[] bytes) {
    sign = bytes;
  }

  public CallSign(){
    sign = new byte[Constants.LENGTH_OF_CALLSIGN];
  }

  public byte[] get(){
    return sign;
  }

  /**
   * Returns a valid hash code for this object.
   */
  public int hashCode() {
    int h = 0;
    for (int i = 0; i < sign.length; i++) {
      h += sign[i];
    }
    return h;
  }

  /**
   * Performs an equality test between this object and another.
   */
  public boolean equals(final Object other) {
    if (other == this) {
      return true;
    }
    else if (other instanceof CallSign) {
      final byte[] other_sign = ((CallSign) other).sign;
      if (other_sign.length != sign.length) {
        return false;
      }
      for (int i = 0; i < other_sign.length; i++) {
        if (other_sign[i] != sign[i]) { return false; }
      }
      return true;
    }
    else {
      return false;
    }
  }
}
