1/*
2 * Copyright (C) 2011 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14
15package com.google.caliper.util;
16
17import java.io.PrintWriter;
18
19/**
20 * Exception used to abort command-line processing because the user has asked for help (using either
21 * --help or -h).
22 */
23@SuppressWarnings("serial") // who would serialize a command-line parsing error?
24public final class DisplayUsageException extends InvalidCommandException {
25  public DisplayUsageException() {
26    super("(User asked for --help. This message should not appear anywhere.)");
27  }
28
29  @Override public void display(PrintWriter writer) {
30    displayUsage(writer);
31  }
32
33  @Override public int exitCode() {
34    return 0;
35  }
36}
37