001// Copyright 2008, 2009 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 java.lang.annotation.Documented;
018import static java.lang.annotation.ElementType.FIELD;
019import java.lang.annotation.Retention;
020import static java.lang.annotation.RetentionPolicy.RUNTIME;
021import java.lang.annotation.Target;
022
023import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.PAGE;
024import org.apache.tapestry5.ioc.annotations.UseWith;
025
026/**
027 * Annotation for a field for which the page activation context handlers (onActivate and onPassivate) should be created.
028 * In order to use this annotation you must contribute a {@link org.apache.tapestry5.ValueEncoder} for the class of the
029 * annotated property.
030 * <p/>
031 * You should not use this annotation more than once per page class; doing it will result in a runtime exception.
032 */
033@Target(FIELD)
034@Documented
035@Retention(RUNTIME)
036@UseWith(PAGE)
037public @interface PageActivationContext
038{
039    /**
040     * Whether to create an activate event handler.
041     */
042    boolean activate() default true;
043
044    /**
045     * Whether to create a passivate event handler
046     */
047    boolean passivate() default true;
048}