Method toUnchecked

core/src/main/java/org/apache/calcite/util/Util.java:1092–1100

Wraps an exception with RuntimeException and return it. If the exception is already an instance of RuntimeException, returns it directly.

(Exception e)

   * returns it directly.
   */
  public static RuntimeException toUnchecked(Exception e) {
    if (e instanceof RuntimeException) {
      return (RuntimeException) e;
    }
    if (e instanceof IOException) {
      return new UncheckedIOException((IOException) e);
    }
    return new RuntimeException(e);
  }

  /**
   * Returns cause of the given throwable if it is non-null or the throwable itself.