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 15 package com.google.caliper.util; 16 17 import com.google.common.collect.ImmutableList; 18 19 import java.io.PrintWriter; 20 import java.util.List; 21 22 /** 23 * Exception that signifies that the <i>user</i> has given an invalid argument string. 24 */ 25 @SuppressWarnings("serial") // who would serialize a command-line parsing error? 26 public class InvalidCommandException extends RuntimeException { 27 private ImmutableList<String> usage; 28 29 public InvalidCommandException(String message, Object... args) { 30 super(String.format(message, args)); 31 } 32 33 public void setUsage(List<String> usage) { 34 this.usage = ImmutableList.copyOf(usage); 35 } 36 37 public void display(PrintWriter writer) { 38 writer.println(getMessage()); 39 if (usage != null) { 40 writer.println(); 41 displayUsage(writer); 42 } 43 } 44 45 protected final void displayUsage(PrintWriter writer) { 46 for (String line : usage) { 47 writer.println(line); 48 } 49 } 50 51 public int exitCode() { 52 return 1; 53 } 54 } 55
