GetOrgShortNamesByIdsMapper.java

/*
 * Copyright (c) 2010 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;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.Query;

import org.eurekastreams.server.persistence.mappers.BaseArgDomainMapper;

/**
 * Mapper to get org short names given their ids. This is intended for async cache updates where we store the org info
 * by short name to save a cache hit.
 */
public class GetOrgShortNamesByIdsMapper extends BaseArgDomainMapper<List<Long>, List<String>>
{
    /**
     * Get the short names for the input org ids.
     *
     * @param inOrgIds
     *            the org ids to look for short names
     * @return short names for the orgs with the input ids
     */
    @Override
    public List<String> execute(final List<Long> inOrgIds)
    {
        if (inOrgIds.isEmpty())
        {
            return new ArrayList<String>();
        }
        Query q = getEntityManager().createQuery("SELECT shortName FROM Organization WHERE id IN (:orgIds)")
                .setParameter("orgIds", inOrgIds);
        return q.getResultList();
    }

}