/*
* Copyright (c) 2011 Lockheed Martin Corporation
*
* 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.eurekastreams.server.persistence.mappers.db.metrics;
import java.io.Serializable;
import java.util.List;
import javax.persistence.Query;
import org.eurekastreams.server.domain.dto.StreamDTO;
import org.eurekastreams.server.persistence.mappers.BaseArgDomainMapper;
/**
* DB Mapper to get the top N group stream sorted by most recent.
*/
public class GetStreamsByMostRecentDbMapper extends BaseArgDomainMapper<Serializable, List<StreamDTO>>
{
/**
* Number of streams to get.
*/
private final Integer streamCount;
/**
* Constructor.
*
* @param inStreamCount
* the number of streams to fetch
*/
public GetStreamsByMostRecentDbMapper(final Integer inStreamCount)
{
streamCount = inStreamCount;
}
/**
* Get the top N streams sorted by most recent.
*
* @param inIgnored
* I don't personally care what you pass in here
* @return a list of StreamDTOs of the most recent streams
*/
@Override
@SuppressWarnings("unchecked")
public List<StreamDTO> execute(final Serializable inIgnored)
{
Query q = getEntityManager().createQuery(
"SELECT new org.eurekastreams.server.search.modelview.DomainGroupModelView(id, "
+ "shortName, name, followersCount, dateAdded, streamScope.id, publicGroup) "
+ "FROM DomainGroup WHERE isPending=false ORDER BY dateAdded DESC");
if (streamCount > 0)
{
q.setMaxResults(streamCount).getResultList();
}
return q.getResultList();
}
}