| 1 | /* |
| 2 | * Copyright (c) 2001-2009, Jean Tessier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * * Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * * Neither the name of Jean Tessier nor the names of his contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | package com.jeantessier.commandline; |
| 34 | |
| 35 | /** |
| 36 | * The command-line can include at most a certain number of parameters or |
| 37 | * the framework will find the command-line invalid. |
| 38 | */ |
| 39 | public class AtMostParameterStrategy extends LimitedCollectingParameterStrategy { |
| 40 | public AtMostParameterStrategy(int limit) { |
| 41 | super(limit); |
| 42 | } |
| 43 | |
| 44 | public int accept(String param) throws CommandLineException { |
| 45 | if (getParameters().size() < getLimit()) { |
| 46 | return super.accept(param); |
| 47 | } else { |
| 48 | throw new CommandLineException("Exceeding " + getLimit() + " parameter(s)."); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | public void validate() throws CommandLineException { |
| 53 | if (getParameters().size() > getLimit()) { |
| 54 | throw new CommandLineException("Number of parameters (" + getParameters().size() + ") cannot exceed " + getLimit()); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | public void accept(Visitor visitor) { |
| 59 | visitor.visitAtMostParameterStrategy(this); |
| 60 | } |
| 61 | } |