/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.rolling.helper;
  
  import java.io.File;
  import java.util.Date;
  
  public class TimeBasedArchiveRemover extends DefaultArchiveRemover {
  
    public TimeBasedArchiveRemover(FileNamePattern fileNamePattern,
                                   RollingCalendar rc) {
      super(fileNamePattern, rc);
    }
  
    protected void cleanByPeriodOffset(Date now, int periodOffset) {
      Date date2delete = rc.getRelativeDate(now, periodOffset);
      String filename = fileNamePattern.convert(date2delete);
      File file2Delete = new File(filename);
      if (file2Delete.exists() && file2Delete.isFile()) {
        file2Delete.delete();
        addInfo("deleting " + file2Delete);
        if (parentClean) {
          removeFolderIfEmpty(file2Delete.getParentFile());
        }
      }
    }
  
    public String toString() {
      return "c.q.l.core.rolling.helper.TimeBasedArchiveRemover";
    }
  }