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.json;
018
019import static org.apache.juneau.commons.utils.Utils.*;
020
021import org.apache.juneau.*;
022import org.apache.juneau.commons.lang.*;
023import org.apache.juneau.json.annotation.*;
024
025/**
026 * Metadata on classes specific to the JSON serializers and parsers pulled from the {@link Json @Json} annotation on
027 * the class.
028 *
029 * <h5 class='section'>See Also:</h5><ul>
030 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/JsonBasics">JSON Basics</a>
031
032 * </ul>
033 */
034public class JsonClassMeta extends ExtendedClassMeta {
035
036   private final String wrapperAttr;
037
038   /**
039    * Constructor.
040    *
041    * @param cm The class that this annotation is defined on.
042    * @param mp JSON metadata provider (for finding information about other artifacts).
043    */
044   public JsonClassMeta(ClassMeta<?> cm, JsonMetaProvider mp) {
045      super(cm);
046
047      var wrapperAttr = Value.<String>empty();
048      cm.forEachAnnotation(Json.class, x -> ne(x.wrapperAttr()), x -> wrapperAttr.set(x.wrapperAttr()));
049      this.wrapperAttr = wrapperAttr.orElse(null);
050   }
051
052   /**
053    * Returns the {@link Json#wrapperAttr() @Json(wrapperAttr)} annotation defined on the class.
054    *
055    * @return The value of the annotation, or <jk>null</jk> if not specified.
056    */
057   protected String getWrapperAttr() { return wrapperAttr; }
058}