| // Copyright 2007 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.ioc.annotations; |
| |
| import org.apache.tapestry5.ioc.def.ServiceDef; |
| |
| import java.lang.annotation.Documented; |
| import static java.lang.annotation.ElementType.METHOD; |
| import static java.lang.annotation.ElementType.TYPE; |
| import java.lang.annotation.Retention; |
| import static java.lang.annotation.RetentionPolicy.RUNTIME; |
| import java.lang.annotation.Target; |
| |
| /** |
| * Used to define one or more {@linkplain ServiceDef#getMarkers() marker annotations} for a service implementation. This |
| * allows for injection based on the combination of type and marker interface. These marker interfaces should not have |
| * any values. The mere presence of the marker annotation is all that is needed. |
| * <p/> |
| * When applied to a module class, this sets the default markers for all services within the module. Markers are |
| * additive, so a Marker annotation on the implementation class and/or specified with {@link |
| * org.apache.tapestry5.ioc.ServiceBindingOptions#withMarker(Class[])} will accumulate; a service may have any number of |
| * markers. Generally one or two is enough. |
| */ |
| @Target( |
| { TYPE, METHOD }) |
| @Retention(RUNTIME) |
| @Documented |
| public @interface Marker |
| { |
| /** |
| * The type of annotation (which will be present at the injection point). |
| */ |
| Class[] value(); |
| } |