001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements. See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License. You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.logging.log4j.core.config.plugins;
019    
020    import java.lang.annotation.Annotation;
021    import java.lang.annotation.Documented;
022    import java.lang.annotation.ElementType;
023    import java.lang.annotation.Retention;
024    import java.lang.annotation.RetentionPolicy;
025    import java.lang.annotation.Target;
026    
027    import org.apache.logging.log4j.core.config.plugins.visitors.PluginVisitor;
028    
029    /**
030     * Meta-annotation to denote the class name to use that implements
031     * {@link org.apache.logging.log4j.core.config.plugins.visitors.PluginVisitor} for the annotated annotation.
032     */
033    @Documented
034    @Retention(RetentionPolicy.RUNTIME)
035    @Target(ElementType.ANNOTATION_TYPE)
036    public @interface PluginVisitorStrategy {
037    
038        /**
039         * The class to use that implements {@link org.apache.logging.log4j.core.config.plugins.visitors.PluginVisitor}
040         * for the given annotation. The generic type in {@code PluginVisitor} should match the annotation this annotation
041         * is applied to.
042         */
043        Class<? extends PluginVisitor<? extends Annotation>> value();
044    }