ChangelogInfoAggregatedDownloadService.java

/**
 * Copyright 2012-2013 Maciej Jaworski, Mariusz Kapcia, Paweł Kędzia, Mateusz Kubuszok
 *
 * <p>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</p> 
 * 
 * <p>http://www.apache.org/licenses/LICENSE-2.0</p>
 *
 * <p>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.</p>
 */
package com.autoupdater.client.download.aggregated.services;

import static net.jsdpu.logger.Logger.getLogger;

import java.util.SortedSet;
import java.util.TreeSet;

import net.jsdpu.logger.Logger;

import com.autoupdater.client.download.DownloadResultException;
import com.autoupdater.client.download.aggregated.notifiers.ChangelogInfoAggregatedNotifier;
import com.autoupdater.client.download.services.ChangelogInfoDownloadService;
import com.autoupdater.client.models.ChangelogEntry;
import com.autoupdater.client.models.Package;

/**
 * Aggregator that downloads several changelogs at the same time.
 * 
 * <p>
 * Result is aggregated as Set of Packages with their changelog set.
 * </p>
 * 
 * @see com.autoupdater.client.download.services.ChangelogInfoDownloadService
 * @see com.autoupdater.client.download.aggregated.notifiers.ChangelogInfoAggregatedNotifier
 */
public class ChangelogInfoAggregatedDownloadService
        extends
        AbstractAggregatedDownloadService<ChangelogInfoDownloadService, ChangelogInfoAggregatedNotifier, SortedSet<ChangelogEntry>, SortedSet<Package>, Package> {
    private static final Logger logger = getLogger(ChangelogInfoAggregatedDownloadService.class);

    @Override
    public SortedSet<Package> getResult() throws DownloadResultException {
        logger.debug("Starts calculating results");
        SortedSet<Package> result = new TreeSet<Package>();
        for (ChangelogInfoDownloadService service : getServices()) {
            Package _package = null;
            if ((_package = getAdditionalMessage(service)) != null) {
                _package.setChangelog(service.getResult());
                result.add(_package);
            }
        }
        logger.debug("Finshed calculating results");
        return result;
    }

    @Override
    protected ChangelogInfoAggregatedNotifier createNotifier() {
        return new ChangelogInfoAggregatedNotifier();
    }
}