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Maps MongoDB objects to POJOs using Jackson

There is a newer version: 5.0.2

/*
 * Copyright 2011 VZ Netzwerke Ltd
 *
 * 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.mongojack.internal;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;
import org.mongojack.DBRef;
import org.mongojack.internal.object.BsonObjectGenerator;
import org.mongojack.internal.stream.DBEncoderBsonGenerator;

import java.io.IOException;

/**
 * Serialises DBRef objects
 *
 * @author James Roper
 * @since 1.2
 */
public class DBRefSerializer extends MongoSerializer {

    @Override
    public void serialize(DBRef value, DBEncoderBsonGenerator bgen, SerializerProvider provider) throws IOException, JsonProcessingException {
        if (value == null) {
            bgen.writeNull();
        } else {
            bgen.writeStartObject();
            bgen.writeFieldName("$ref");
            bgen.writeString(value.getCollectionName());
            bgen.writeFieldName("$id");
            bgen.writeObject(value.getId());
            bgen.writeEndObject();
        }
    }

    @Override
    protected void serialize(DBRef value, BsonObjectGenerator bgen, SerializerProvider provider) throws IOException, JsonProcessingException {
        if (value == null) {
            bgen.writeNull();
        } else {
            bgen.writeObject(new com.mongodb.DBRef(null, value.getCollectionName(), value.getId()));
        }
    }

    @Override
    public Class handledType() {
        return DBRef.class;
    }
}