be.solidx.hot.data.mongo.DBObjectMapTransformer.java Source code

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Here is the source code for be.solidx.hot.data.mongo.DBObjectMapTransformer.java

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package be.solidx.hot.data.mongo;

/*
 * #%L
 * Hot
 * %%
 * Copyright (C) 2010 - 2016 Solidx
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;

public class DBObjectMapTransformer implements DBObjectTransformer<Map<String, Object>> {

    @Override
    public Map<String, Object> fromDBObject(BasicDBObject dbObject) {
        return dbObjectTomap(dbObject);
    }

    @Override
    public Map<String, Object> put(Map<String, Object> t, String key, Object value) {
        t.put(key, value);
        return t;
    }

    public Map<String, Object> dbObjectTomap(DBObject dbObject) {
        if (dbObject == null)
            return null;

        Map<String, Object> map = new LinkedHashMap<String, Object>();
        for (String key : dbObject.keySet()) {
            if (dbObject.get(key) instanceof List<?>) {
                map.put(key.toString(), transformList((List<?>) dbObject.get(key)));
            } else if (dbObject.get(key) instanceof DBObject) {
                map.put(key.toString(), dbObjectTomap((DBObject) dbObject.get(key)));
            } else {
                map.put(key.toString(), key.equals("_id") ? dbObject.get(key).toString() : dbObject.get(key));
            }
        }
        return map;
    }

    public List<Object> transformList(List<?> list) {
        List<Object> transformedList = new ArrayList<Object>();
        for (Object object : list) {
            if (object instanceof List<?>) {
                transformedList.add(transformList((List<?>) object));
            } else if (object instanceof DBObject) {
                transformedList.add(dbObjectTomap((DBObject) object));
            } else {
                transformedList.add(object);
            }
        }
        return transformedList;
    }
}