// Copyright 2009 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.tapestry5.corelib;

 /**

  * Identifies how a {@link org.apache.tapestry5.corelib.LoopFormState} component stores state into the {@link

  * org.apache.tapestry5.services.FormSupport} object.

  *

  * @since 5.1.0.4

  */

 public enum LoopFormState

 {

     /**

      * No state of any kind is stored, as if the Loop was not contained within a {@link

      * org.apache.tapestry5.corelib.components.Form}.

      */

     NONE,

     /**

      * Only enough state to iterate over the source values is stored. When the Form is submitted, the Loop will

      * re-acquire its source and iterate over it. This is equivalent to "volatile" mode in Tapestry 5.0. This can be

      * subject to race conditions when the values within the source change between render and submit.

      */

     ITERATION,

     /**

      * Stores a sequence of values (obtained via a {@link org.apache.tapestry5.ValueEncoder}) into the Form state. The

      * source parameter is <em>not</em> re-acquired when the Form is submitted.

      */

     VALUES

 }