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    
015    package org.apache.tapestry.annotations;
016    
017    import java.lang.annotation.Documented;
018    import java.lang.annotation.ElementType;
019    import java.lang.annotation.Retention;
020    import java.lang.annotation.RetentionPolicy;
021    import 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
035    public @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    }