001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.mmtk.utility.options;
014
015/**
016 * GC verbosity level.
017 */
018public final class Verbose extends org.vmutil.options.IntOption {
019  /**
020   * Create the option.
021   */
022  public Verbose() {
023    super(Options.set, "Verbose",
024          "GC verbosity level",
025          0);
026  }
027
028  /**
029   * Only accept non-negative values.
030   */
031  @Override
032  protected void validate() {
033    failIf(this.value < 0, "Unreasonable verbosity level");
034  }
035}