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.field; 032 033 034 /** 035 * A {@link FieldWrapper} which wraps a {@link Field} which can be unset, e.g. null. 036 */ 037 public class OptionalField<F extends ReferenceField> extends BaseFieldWrapper<F> 038 { 039 // from BaseFieldWrapper 040 public OptionalField (F wrapped, Field parent) 041 { 042 super(wrapped, parent); 043 } 044 045 // from BaseFieldWrapper 046 public OptionalField (Class<? extends Field> clazz, Field parent) 047 { 048 super(clazz, parent); 049 } 050 051 // from BaseFieldWrapper 052 public OptionalField (String abstractName, Field parent) 053 { 054 super(abstractName, parent); 055 } 056 057 @Override // from BaseFieldWrapper 058 public void validateWrappedField () 059 { 060 if (isSet()) { 061 appendViolationList(getField().validate()); 062 } 063 } 064 }