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    
015    package org.apache.tapestry5.annotations;
016    
017    import java.lang.annotation.*;
018    
019    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.BEAN;
020    import org.apache.tapestry5.ioc.annotations.UseWith;
021    
022    /**
023     * Marker annotation that can be placed on a session-persisted object to indicate that the object is immutable, and
024     * therefore does not require end-of-request restoring into the session.
025     *
026     * @see org.apache.tapestry5.OptimizedSessionPersistedObject
027     * @since 5.1.1.0
028     */
029    @Target(ElementType.TYPE)
030    @Retention(RetentionPolicy.RUNTIME)
031    @Documented
032    @Inherited
033    @UseWith(BEAN)
034    public @interface ImmutableSessionPersistedObject
035    {
036    }