/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2013, 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;

import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.rolling.helper.CompressionMode;
import ch.qos.logback.core.rolling.helper.FileNamePattern;
import ch.qos.logback.core.spi.ContextAwareBase;

/**
 * Implements methods common to most, it not all, rolling policies. Currently
 * such methods are limited to a compression mode getter/setter.
 * 
 * @author Ceki G&uuml;lc&uuml;
 */
public abstract class RollingPolicyBase extends ContextAwareBase implements
    RollingPolicy {
  protected CompressionMode compressionMode = CompressionMode.NONE;

  FileNamePattern fileNamePattern;
  // fileNamePatternStr is always slashified, see setter
  protected String fileNamePatternStr;

  private FileAppender parent;

  // use to name files within zip file, i.e. the zipEntry
  FileNamePattern zipEntryFileNamePattern;
  private boolean started;

  /**
   * Given the FileNamePattern string, this method determines the compression
   * mode depending on last letters of the fileNamePatternStr. Patterns ending
   * with .gz imply GZIP compression, endings with '.zip' imply ZIP compression.
   * Otherwise and by default, there is no compression.
   * 
   */
  protected void determineCompressionMode() {
    if (fileNamePatternStr.endsWith(".gz")) {
      addInfo("Will use gz compression");
      compressionMode = CompressionMode.GZ;
    } else if (fileNamePatternStr.endsWith(".zip")) {
      addInfo("Will use zip compression");
      compressionMode = CompressionMode.ZIP;
    } else {
      addInfo("No compression will be used");
      compressionMode = CompressionMode.NONE;
    }
  }

  public void setFileNamePattern(String fnp) {
    fileNamePatternStr = fnp;
  }

  public String getFileNamePattern() {
    return fileNamePatternStr;
  }

  public CompressionMode getCompressionMode() {
    return compressionMode;
  }

  public boolean isStarted() {
    return started;
  }

  public void start() {
    started = true;
  }

  public void stop() {
    started = false;
  }

  public void setParent(FileAppender appender) {
    this.parent = appender;
  }

  public boolean isParentPrudent() {
    return parent.isPrudent();
  }

  public String getParentsRawFileProperty() {
    return parent.rawFileProperty();
  }
}
