001 /* 002 * Jpkg - Java library and tools for operating system package creation. 003 * 004 * Copyright (c) 2007-2008 Three Rings Design, Inc. 005 * All rights reserved. 006 * 007 * Redistribution and use in source and binary forms, with or without 008 * modification, are permitted provided that the following conditions 009 * are met: 010 * 1. Redistributions of source code must retain the above copyright 011 * notice, this list of conditions and the following disclaimer. 012 * 2. Redistributions in binary form must reproduce the above copyright 013 * notice, this list of conditions and the following disclaimer in the 014 * documentation and/or other materials provided with the distribution. 015 * 3. Neither the name of the copyright owner nor the names of contributors 016 * may be used to endorse or promote products derived from this software 017 * without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 023 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 024 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 025 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 026 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 027 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 029 * POSSIBILITY OF SUCH DAMAGE. 030 */ 031 package com.threerings.antidote.property; 032 033 import java.util.List; 034 035 import com.threerings.antidote.field.Field; 036 037 public class NonEmptyListProperty extends ListProperty 038 { 039 // from BaseProperty 040 public NonEmptyListProperty (String name, Field field) 041 { 042 super(name, field); 043 } 044 045 // from BaseProperty 046 public NonEmptyListProperty (String name, Field field, List<String> defaultValue) 047 { 048 super(name, field, defaultValue); 049 } 050 051 @Override // from ListProperty 052 protected List<String> validateProperty () 053 { 054 final List<String> list = super.validateProperty(); 055 if (wasSetBlank(list)) { 056 appendViolation(new EmptyListPropertyViolation(this)); 057 return null; 058 } 059 return list; 060 } 061 062 /** 063 * Returns true if the list was set by the user, but contains only the empty string. 064 */ 065 private boolean wasSetBlank (List<String> list) 066 { 067 // if the user did not set a value, return false. 068 if (isNotSet()) { 069 return false; 070 } 071 072 // if the list contains only one element and it is the empty string, return true. 073 if (list.size() == 1 && list.get(0).trim().equals("")) { 074 return true; 075 } 076 077 return false; 078 } 079 }