| // Copyright 2008 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry.corelib.data; |
| |
| /** |
| * Used with the {@link org.apache.tapestry.corelib.components.Select} component to control whether an initial blank |
| * option is supplied. Determines the optionality of the undelrying property from the Select's {@linkplain |
| * org.apache.tapestry.FieldValidator#isRequired() validate parameter} |
| */ |
| public enum BlankOption |
| { |
| /** |
| * Always include the blank option, even if the underlying property is required. |
| */ |
| ALWAYS, |
| |
| /** |
| * Never include the blank option, even if the underlying property is optional. |
| */ |
| NEVER, |
| |
| /** |
| * The default: include the blank option if the underlying property is optional. |
| */ |
| AUTO; |
| } |