org.sonar.core.computation.dbcleaner.period.Interval.java Source code

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Here is the source code for org.sonar.core.computation.dbcleaner.period.Interval.java

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/*
 * SonarQube, open source software quality management tool.
 * Copyright (C) 2008-2014 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * SonarQube 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.
 *
 * SonarQube 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.core.computation.dbcleaner.period;

import com.google.common.collect.Lists;
import org.apache.commons.lang.time.DateUtils;
import org.sonar.core.purge.PurgeableSnapshotDto;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

final class Interval {
    List<PurgeableSnapshotDto> snapshots = Lists.newArrayList();

    void add(PurgeableSnapshotDto snapshot) {
        snapshots.add(snapshot);
    }

    List<PurgeableSnapshotDto> get() {
        return snapshots;
    }

    int count() {
        return snapshots.size();
    }

    static List<Interval> group(List<PurgeableSnapshotDto> snapshots, Date start, Date end, int calendarField) {
        List<Interval> intervals = Lists.newArrayList();

        GregorianCalendar calendar = new GregorianCalendar();
        int lastYear = -1;
        int lastFieldValue = -1;
        Interval currentInterval = null;

        for (PurgeableSnapshotDto snapshot : snapshots) {
            if (!DateUtils.isSameDay(start, snapshot.getDate()) && snapshot.getDate().after(start)
                    && (snapshot.getDate().before(end) || DateUtils.isSameDay(end, snapshot.getDate()))) {
                calendar.setTime(snapshot.getDate());
                int currentFieldValue = calendar.get(calendarField);
                int currentYear = calendar.get(Calendar.YEAR);
                if (lastYear != currentYear || lastFieldValue != currentFieldValue) {
                    currentInterval = new Interval();
                    intervals.add(currentInterval);
                }
                lastFieldValue = currentFieldValue;
                lastYear = currentYear;
                if (currentInterval != null) {
                    currentInterval.add(snapshot);
                }
            }
        }
        return intervals;
    }
}