    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    }