001// Copyright 2005 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.tapestry.annotations; 016 017import java.lang.annotation.Documented; 018import java.lang.annotation.ElementType; 019import java.lang.annotation.Retention; 020import java.lang.annotation.RetentionPolicy; 021import java.lang.annotation.Target; 022 023/** 024 * An annotation used to provide the initial value of a transient or persistent property. 025 * 026 * @author Howard M. Lewis Ship 027 * @since 4.0 028 * @see org.apache.tapestry.annotations.PersistAnnotationWorker 029 * @see org.apache.tapestry.annotations.InitialValueAnnotationWorker 030 */ 031@Target( 032{ ElementType.METHOD }) 033@Retention(RetentionPolicy.RUNTIME) 034@Documented 035public @interface InitialValue { 036 /** 037 * The initial value for the property as a binding reference that is evaluated when the page is 038 * first constructed, and again every time the page is detached and returned to the page pool. 039 * The default binding prefix is "ognl:". 040 */ 041 String value(); 042}