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 */
017package org.apache.juneau.marshall.uon;
018
019import static java.lang.annotation.ElementType.*;
020import static java.lang.annotation.RetentionPolicy.*;
021
022import java.lang.annotation.*;
023
024import org.apache.juneau.marshall.*;
025
026/**
027 * Dynamically applies a {@link Uon @Uon} annotation to specified classes, methods, or fields.
028 *
029 * <p>
030 * This annotation separates the <b>targeting</b> concern ({@link #on()}/{@link #onClass()}) from the
031 * <b>content</b> concern ({@link #value()}), enabling {@link Uon @Uon} to be a pure data annotation
032 * without marshall-specific application machinery.
033 *
034 * <h5 class='section'>See Also:</h5><ul>
035 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/DynamicallyAppliedAnnotations">Dynamically Applied Annotations</a>
036 * </ul>
037 */
038@Documented
039@Target({ TYPE, METHOD })
040@Retention(RUNTIME)
041@Repeatable(UonApply.Array.class)
042@ContextApply(UonApplyAnnotation.Applier.class)
043public @interface UonApply {
044
045   Uon value();
046
047   String[] on() default {};
048
049   Class<?>[] onClass() default {};
050
051   @Documented
052   @Target({ TYPE, METHOD })
053   @Retention(RUNTIME)
054   public @interface Array {
055      UonApply[] value();
056   }
057}