net.sf.okapi.lib.tmdb.mongodb.MongoHelper.java Source code

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Here is the source code for net.sf.okapi.lib.tmdb.mongodb.MongoHelper.java

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/*===========================================================================
  Copyright (C) 2011 by the Okapi Framework contributors
-----------------------------------------------------------------------------
  This library is free software; you can redistribute it and/or modify it 
  under the terms of the GNU Lesser General Public License as published by 
  the Free Software Foundation; either version 2.1 of the License, or (at 
  your option) any later version.
    
  This library 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 Lesser 
  General Public License for more details.
    
  You should have received a copy of the GNU Lesser General Public License 
  along with this library; if not, write to the Free Software Foundation, 
  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    
  See also the full LGPL text here: http://www.gnu.org/copyleft/lesser.html
===========================================================================*/

package net.sf.okapi.lib.tmdb.mongodb;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;

public class MongoHelper {

    /**
     * Find a specific coll entry
     * @return
     */
    static DBObject findCollEntry(DB db, String collName, String key, Object value) {
        DBCollection coll = db.getCollection(collName);
        return findCollEntry(coll, key, value);
    }

    /**
     * Find a specific coll entry
     * @return
     */
    static DBObject findCollEntry(DBCollection coll, String key, Object value) {
        BasicDBObject query = new BasicDBObject();
        query.put(key, value);
        return coll.findOne(query);
    }

    /**
     * Find a specific coll entry value
     * @return
     */
    static String findCollEntryValue(DB db, String collName, String key, Object value, String field) {
        DBCollection coll = db.getCollection(collName);
        return findCollEntryValue(coll, key, value, field);
    }

    /**
     * Find a specific coll entry value
     * @return
     */
    static String findCollEntryValue(DBCollection coll, String key, Object value, String field) {
        BasicDBObject query = new BasicDBObject();
        query.put(key, value);

        DBObject obj = coll.findOne(query);

        if (obj != null) {
            return (String) obj.get(field);
        } else {
            return null;
        }
    }
}