Package org.gtugs.repository

Source Code of org.gtugs.repository.JdoLocationDao

/*
* Copyright 2009 Google Inc.
*
* 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.gtugs.repository;

import org.gtugs.domain.Location;
import org.springframework.orm.jdo.support.JdoDaoSupport;
import org.springframework.stereotype.Repository;

import java.util.List;

import javax.jdo.JDOObjectNotFoundException;
import javax.jdo.PersistenceManager;
import javax.jdo.Query;

/**
* @author jasonacooper@google.com (Jason Cooper)
*/
@Repository
public class JdoLocationDao extends JdoDaoSupport {

  public JdoLocationDao() {
    super();
    setPersistenceManagerFactory(PMF.get());
  }

  @SuppressWarnings("unchecked")
  public void incrementOrStoreLocation(Double latitude,
      Double longitude) {
    PersistenceManager pm = getPersistenceManager();

    String key = latitude + ";" + longitude;
    Location location = null;

    try {
      location = pm.getObjectById(Location.class, key);

      if (location != null) {
        location.setOccurrences(location.getOccurrences() + 1);
        pm.makePersistent(location);
      }
    } catch (JDOObjectNotFoundException e) {
      location = new Location(key, latitude, longitude);
      pm.makePersistent(location);
    } finally {
      pm.close();
    }
  }

  public List<Location> getLocations() {
    PersistenceManager pm = getPersistenceManager();

    Query query = pm.newQuery(Location.class);

    try {
      List<Location> results = (List<Location>) query.execute();

      if (results != null && results.size() > 0) {
        return (List<Location>) pm.detachCopyAll(results);
      }
    } finally {
      query.closeAll();
      pm.close();
    }

    return null;
  }
}
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