MessagesManager.java

package com.proudcase.mongodb.manager;

import com.google.code.morphia.Datastore;
import com.google.code.morphia.dao.BasicDAO;
import com.google.code.morphia.mapping.Mapper;
import com.google.code.morphia.query.Query;
import com.google.code.morphia.query.UpdateOperations;
import com.google.code.morphia.query.UpdateResults;
import com.proudcase.persistence.MessagesBean;
import com.proudcase.persistence.UserBean;
import java.util.List;
import org.bson.types.ObjectId;

/**
  * Copyright © 24.09.2012 Michel Vocks
  * This file is part of proudcase.

  * proudcase 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.

  * proudcase 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 proudcase.  If not, see <http://www.gnu.org/licenses/>.

/**
 * @Author: Michel Vocks
 *
 * @Date: 24.09.2012
 *
 * @Encoding: UTF-8
 */
public class MessagesManager extends BasicDAO<MessagesBean, ObjectId> { 
    
    public MessagesManager(Datastore datastore) {
        super(MessagesBean.class, datastore);
    }
    
    public List<MessagesBean> getAllMessagesForUser(UserBean receiver) {
        // Query
        Query<MessagesBean> query = ds.createQuery(MessagesBean.class)
                .field("receiver").equal(receiver);
        
        // return as list
        return query.asList();
    }
    
    public boolean updateMessageReachedFlag(MessagesBean message) {
        // Query 
        Query<MessagesBean> query = ds.createQuery(MessagesBean.class)
                .field(Mapper.ID_KEY).equal(message.getId());
        
        // update statement
        UpdateOperations<MessagesBean> ops = ds.createUpdateOperations(MessagesBean.class)
                .set("reached", message.isReached());
        
        // execute
        UpdateResults<MessagesBean> result = ds.updateFirst(query, ops);
        
        if (result.getUpdatedCount() > 0) {
            return true;
        }
        return false;
    }

}