001    // Copyright 2006, 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.Documented;
018    import static java.lang.annotation.ElementType.FIELD;
019    import java.lang.annotation.Retention;
020    import static java.lang.annotation.RetentionPolicy.RUNTIME;
021    import java.lang.annotation.Target;
022    
023    import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.COMPONENT;
024    import org.apache.tapestry5.ioc.annotations.UseWith;
025    
026    /**
027     * Used to attach one ore more instance mixin to an embedded component. Each mixin is specified in terms of a logical
028     * mixin type name. This annotation is only recognized when used in conjuction with the {@link Component} annotation.
029     *
030     * @see MixinClasses
031     */
032    @Target(FIELD)
033    @Documented
034    @Retention(RUNTIME)
035    @UseWith(COMPONENT)
036    public @interface Mixins
037    {
038    
039        /**
040         * One or more mixin type names and optional constraints, from which actual mixin class names can be resolved.
041         * For specifying constraints, do:
042         * mixinname::constraint1;constraint2
043         * For instance:
044         * mixina::before:mixinb;after:mixinc;after:mixind
045         */
046        String[] value();
047    }