Java tutorial
/* * Copyright (C) 2011 Benoit GUEROUT <bguerout at gmail dot com> and Yves AMSELLEM <amsellem dot yves at gmail dot com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.jongo.marshall.jackson; import com.fasterxml.jackson.annotation.JsonInclude.Include; import com.fasterxml.jackson.databind.PropertyName; import com.fasterxml.jackson.databind.introspect.Annotated; import com.fasterxml.jackson.databind.introspect.NopAnnotationIntrospector; import org.jongo.marshall.jackson.oid.*; @SuppressWarnings("deprecation") public class JongoAnnotationIntrospector extends NopAnnotationIntrospector { private static final long serialVersionUID = 1L; @Override public Include findSerializationInclusion(Annotated a, Include defValue) { return hasMongoObjectId(a) ? Include.NON_NULL : defValue; } @Override public Object findSerializer(Annotated a) { return hasMongoObjectId(a) ? ObjectIdSerializer.class : super.findSerializer(a); } @Override public Object findDeserializer(Annotated a) { return hasMongoObjectId(a) ? ObjectIdDeserializer.class : super.findDeserializer(a); } @Override public PropertyName findNameForSerialization(Annotated a) { return hasMongoId(a) ? new PropertyName("_id") : super.findNameForSerialization(a); } @Override public PropertyName findNameForDeserialization(Annotated a) { return hasMongoId(a) ? new PropertyName("_id") : super.findNameForDeserialization(a); } private static boolean hasMongoId(Annotated a) { return a.hasAnnotation(MongoId.class) || a.hasAnnotation(Id.class); } private static boolean hasMongoObjectId(Annotated a) { return a.hasAnnotation(MongoObjectId.class) || a.hasAnnotation(ObjectId.class); } }