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     * Allows a property to be marked as persistent (and, optionally, provide control over how the
025     * property is persisted).
026     * 
027     * @author Howard M. Lewis Ship
028     * @since 4.0
029     */
030    
031    @Target(
032    { ElementType.METHOD })
033    @Retention(RetentionPolicy.RUNTIME)
034    @Documented
035    public @interface Persist {
036    
037        /**
038         * The persistence strategy, defaulting to "session", as defined on the 
039         * org.apache.tapestry.default-property-persistence-strategy property (meaning, in the
040         * HttpSession, as a session attribute). Tapestry includes another strategy, "client",
041         * and additional strategies can be defined.
042         */
043        String value() default "";
044    }