001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  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 distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.json;
014
015import static org.apache.juneau.internal.StringUtils.*;
016
017import org.apache.juneau.*;
018import org.apache.juneau.json.annotation.*;
019
020/**
021 * Metadata on classes specific to the JSON serializers and parsers pulled from the {@link Json @Json} annotation on
022 * the class.
023 */
024public class JsonClassMeta extends ClassMetaExtended {
025
026   private final Json json;
027   private final String wrapperAttr;
028
029   /**
030    * Constructor.
031    *
032    * @param cm The class that this annotation is defined on.
033    */
034   public JsonClassMeta(ClassMeta<?> cm) {
035      super(cm);
036      this.json = cm.getInfo().getAnnotation(Json.class);
037      if (json != null) {
038         wrapperAttr = nullIfEmpty(json.wrapperAttr());
039      } else {
040         wrapperAttr = null;
041      }
042   }
043
044   /**
045    * Returns the {@link Json @Json} annotation defined on the class.
046    *
047    * @return The value of the annotation, or <jk>null</jk> if not specified.
048    */
049   protected Json getAnnotation() {
050      return json;
051   }
052
053   /**
054    * Returns the {@link Json#wrapperAttr() @Json(wrapperAttr)} annotation defined on the class.
055    *
056    * @return The value of the annotation, or <jk>null</jk> if not specified.
057    */
058   protected String getWrapperAttr() {
059      return wrapperAttr;
060   }
061}