package utils;

public class Assert {

  static public void notFalse(boolean b)
      throws IllegalArgumentException {

    if (b == false)
      throw new IllegalArgumentException(
          "boolean expression false");

  }

  static public void notNull(Object obj)

      throws IllegalArgumentException {

    if (obj == null)

      throw new IllegalArgumentException("null argument");

  }


  static public void notFalse(boolean b, String s)

      throws IllegalArgumentException {

    if (b == false)

      throw new IllegalArgumentException(s);

  }

  static public void notNull(Object obj, String s)

      throws IllegalArgumentException {

    if (obj == null)

      throw new IllegalArgumentException(s);

  }

}