org.oncoblocks.centromere.mongodb.ImportUtils.java Source code

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Here is the source code for org.oncoblocks.centromere.mongodb.ImportUtils.java

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/*
 * Copyright 2016 William Oemler, Blueprint Medicines
 *
 * 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.oncoblocks.centromere.mongodb;

import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.convert.MongoConverter;

/**
 * Utility class for data imports using MongoDB.
 * 
 * @author woemler
 */
public class ImportUtils {

    private final MongoTemplate mongoTemplate;

    public ImportUtils(MongoTemplate mongoTemplate) {
        this.mongoTemplate = mongoTemplate;
    }

    /**
     * Serializes an object into a string format that can be inserted into a MongoDB collection.
     * 
     * @param entity
     * @return
     */
    public String convertEntityToJson(Object entity) {
        MongoConverter converter = mongoTemplate.getConverter();
        DBObject dbObject = new BasicDBObject();
        converter.write(entity, dbObject);
        if (dbObject.containsField("_id") && dbObject.get("_id") == null) {
            dbObject.removeField("_id");
        }
        if (dbObject.containsField("_class")) {
            dbObject.removeField("_class");
        }
        return dbObject.toString();
    }

}