001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019 */
020package org.sonar.batch.components;
021
022import org.apache.commons.lang.time.DateUtils;
023import org.sonar.api.BatchExtension;
024import org.sonar.api.CoreProperties;
025import org.sonar.api.database.DatabaseSession;
026import org.sonar.api.database.model.Snapshot;
027import org.sonar.api.resources.Qualifiers;
028
029import java.util.Date;
030import java.util.List;
031
032public class PastSnapshotFinderByDays implements BatchExtension {
033
034  private DatabaseSession session;
035
036  public PastSnapshotFinderByDays(DatabaseSession session) {
037    this.session = session;
038  }
039
040  PastSnapshot findFromDays(Snapshot projectSnapshot, int days) {
041    Date targetDate = DateUtils.addDays(projectSnapshot.getCreatedAt(), -days);
042    String hql = "from " + Snapshot.class.getSimpleName() + " where resourceId=:resourceId AND status=:status AND createdAt<:date AND qualifier<>:lib order by createdAt asc";
043    List<Snapshot> snapshots = session.createQuery(hql)
044        .setParameter("date", projectSnapshot.getCreatedAt())
045        .setParameter("resourceId", projectSnapshot.getResourceId())
046        .setParameter("status", Snapshot.STATUS_PROCESSED)
047        .setParameter("lib", Qualifiers.LIBRARY)
048        .getResultList();
049
050    Snapshot snapshot = getNearestToTarget(snapshots, targetDate);
051    return new PastSnapshot(CoreProperties.TIMEMACHINE_MODE_DAYS, targetDate, snapshot).setModeParameter(String.valueOf(days));
052  }
053
054  static Snapshot getNearestToTarget(List<Snapshot> snapshots, Date currentDate, int distanceInDays) {
055    Date targetDate = DateUtils.addDays(currentDate, -distanceInDays);
056    return getNearestToTarget(snapshots, targetDate);
057  }
058
059  static Snapshot getNearestToTarget(List<Snapshot> snapshots, Date targetDate) {
060    long bestDistance = Long.MAX_VALUE;
061    Snapshot nearest = null;
062    for (Snapshot snapshot : snapshots) {
063      long distance = distance(snapshot.getCreatedAt(), targetDate);
064      if (distance <= bestDistance) {
065        bestDistance = distance;
066        nearest = snapshot;
067      }
068    }
069    return nearest;
070  }
071
072  static long distance(Date d1, Date d2) {
073    return Math.abs(d1.getTime() - d2.getTime());
074  }
075}