001    // Copyright 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.ioc.annotations;
016    
017    import java.lang.annotation.*;
018    
019    /**
020     * Marks a service as not eligible for decoration. This is useful for services that, if decorated, can cause cycle
021     * dependency errors; for example, {@link org.apache.tapestry5.ioc.services.MasterObjectProvider}, or services
022     * <em>contributed to</em> MasterObjectProvider, are good candidates for this annotation.
023     * <p/>
024     * The annotation can be applied to service implementation class or to a service builder method in a module class.
025     * <p/>
026     * The annotation may also be placed on a module class, to indicate that all services defined for the module should not
027     * allow decoration.
028     * <p/>
029     * Service decoration includes the decoration mechanism (from Tapestry 5.0) and the newer service advice mechanism (from
030     * Tapestry 5.1).
031     *
032     * @see org.apache.tapestry5.ioc.def.ServiceDef2#isPreventDecoration()
033     * @since 5.1.0.0
034     */
035    @Target({ ElementType.TYPE, ElementType.METHOD })
036    @Retention(RetentionPolicy.RUNTIME)
037    @Documented
038    @UseWith(AnnotationUseContext.SERVICE)
039    public @interface PreventServiceDecoration
040    {
041    }