/*
* SonarQube
* Copyright (C) 2009-2017 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.db.purge.period;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
import java.util.Date;
import java.util.List;
import org.sonar.api.utils.DateUtils;
import org.sonar.api.utils.log.Loggers;
import org.sonar.db.purge.PurgeableAnalysisDto;
class KeepOneFilter implements Filter {
private final Date start;
private final Date end;
private final int dateField;
private final String label;
KeepOneFilter(Date start, Date end, int calendarField, String label) {
this.start = start;
this.end = end;
this.dateField = calendarField;
this.label = label;
}
@Override
public List<PurgeableAnalysisDto> filter(List<PurgeableAnalysisDto> history) {
List<Interval> intervals = Interval.group(history, start, end, dateField);
List<PurgeableAnalysisDto> result = Lists.newArrayList();
for (Interval interval : intervals) {
appendSnapshotsToDelete(interval, result);
}
return result;
}
@Override
public void log() {
Loggers.get(getClass()).debug("-> Keep one snapshot per {} between {} and {}", label, DateUtils.formatDate(start), DateUtils.formatDate(end));
}
private void appendSnapshotsToDelete(Interval interval, List<PurgeableAnalysisDto> toDelete) {
if (interval.count() > 1) {
List<PurgeableAnalysisDto> deletables = Lists.newArrayList();
List<PurgeableAnalysisDto> toKeep = Lists.newArrayList();
for (PurgeableAnalysisDto snapshot : interval.get()) {
if (isDeletable(snapshot)) {
deletables.add(snapshot);
} else {
toKeep.add(snapshot);
}
}
if (!toKeep.isEmpty()) {
toDelete.addAll(deletables);
} else if (deletables.size() > 1) {
// keep last snapshot
toDelete.addAll(deletables.subList(0, deletables.size() - 1));
}
}
}
@VisibleForTesting
static boolean isDeletable(PurgeableAnalysisDto snapshot) {
return !snapshot.isLast() && !snapshot.hasEvents();
}
}