    001// Copyright 2010 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.annotations;
    016
    017import static java.lang.annotation.ElementType.METHOD;
    018import static java.lang.annotation.RetentionPolicy.RUNTIME;
    019import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.COMPONENT;
    020import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.MIXIN;
    021import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.PAGE;
    022
    023import java.lang.annotation.Documented;
    024import java.lang.annotation.Retention;
    025import java.lang.annotation.Target;
    026
    027import org.apache.tapestry5.ioc.annotations.UseWith;
    028
    029/**
    030 * Marks a method of a page or a component to discard all persistent field changes. The changes are
    031 * eliminated from persistent storage after the marked method is invoked. Any exception (runtime or checked)
    032 * thrown by annotated method will cause persistent fields to keep their values.
    033 *
    034 * @see org.apache.tapestry5.ComponentResources#discardPersistentFieldChanges()
    035 * @since 5.2.0
    036 */
    037@Target(METHOD)
    038@Retention(RUNTIME)
    039@Documented
    040@UseWith({COMPONENT,MIXIN,PAGE})
    041public @interface DiscardAfter
    042{
    043
    044}