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Dahua ICC Open API SDK for Java
There is a newer version: 1.0.13.7
package com.dahuatech.hutool.log.dialect.tinylog;

import com.dahuatech.hutool.core.util.ArrayUtil;
import com.dahuatech.hutool.core.util.StrUtil;
import com.dahuatech.hutool.log.AbstractLog;
import org.pmw.tinylog.Level;
import org.pmw.tinylog.LogEntryForwarder;
import org.pmw.tinylog.Logger;

/**
 * tinylog log.

 *
 * @author Looly
 */
public class TinyLog extends AbstractLog {
  private static final long serialVersionUID = -4848042277045993735L;

  /** 堆栈增加层数，因为封装因此多了两层，此值用于正确获取当前类名 */
  private static final int DEPTH = 4;

  private int level;
  private String name;

  // ------------------------------------------------------------------------- Constructor
  public TinyLog(Class clazz) {
    this(null == clazz ? StrUtil.NULL : clazz.getName());
  }

  public TinyLog(String name) {
    this.name = name;
    this.level = Logger.getLevel(name).ordinal();
  }

  /**
   * 如果最后一个参数为异常参数，则获取之，否则返回null
   *
   * @param arguments 参数
   * @return 最后一个异常参数
   * @since 4.0.3
   */
  private static Throwable getLastArgumentIfThrowable(Object... arguments) {
    if (ArrayUtil.isNotEmpty(arguments) && arguments[arguments.length - 1] instanceof Throwable) {
      return (Throwable) arguments[arguments.length - 1];
    } else {
      return null;
    }
  }

  @Override
  public String getName() {
    return this.name;
  }

  // ------------------------------------------------------------------------- Trace
  @Override
  public boolean isTraceEnabled() {
    return this.level <= Level.TRACE.ordinal();
  }

  @Override
  public void trace(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.TRACE, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Debug
  @Override
  public boolean isDebugEnabled() {
    return this.level <= Level.DEBUG.ordinal();
  }

  @Override
  public void debug(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.DEBUG, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Info
  @Override
  public boolean isInfoEnabled() {
    return this.level <= Level.INFO.ordinal();
  }

  @Override
  public void info(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.INFO, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Warn
  @Override
  public boolean isWarnEnabled() {
    return this.level <= org.pmw.tinylog.Level.WARNING.ordinal();
  }

  @Override
  public void warn(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.WARNING, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Error
  @Override
  public boolean isErrorEnabled() {
    return this.level <= Level.ERROR.ordinal();
  }

  @Override
  public void error(String fqcn, Throwable t, String format, Object... arguments) {
    logIfEnabled(fqcn, Level.ERROR, t, format, arguments);
  }

  // ------------------------------------------------------------------------- Log
  @Override
  public void log(
      String fqcn,
      com.dahuatech.hutool.log.level.Level level,
      Throwable t,
      String format,
      Object... arguments) {
    logIfEnabled(fqcn, toTinyLevel(level), t, format, arguments);
  }

  @Override
  public boolean isEnabled(com.dahuatech.hutool.log.level.Level level) {
    return this.level <= toTinyLevel(level).ordinal();
  }

  /**
   * 在对应日志级别打开情况下打印日志
   *
   * @param fqcn 完全限定类名(Fully Qualified Class Name)，用于定位日志位置
   * @param level 日志级别
   * @param t 异常，null则检查最后一个参数是否为Throwable类型，是则取之，否则不打印堆栈
   * @param format 日志消息模板
   * @param arguments 日志消息参数
   */
  private void logIfEnabled(
      String fqcn, Level level, Throwable t, String format, Object... arguments) {
    // fqcn 无效
    if (null == t) {
      t = getLastArgumentIfThrowable(arguments);
    }
    LogEntryForwarder.forward(DEPTH, level, t, format, arguments);
  }

  /**
   * 将ICC的Level等级转换为Tinylog的Level等级
   *
   * @param level ICC的Level等级
   * @return Tinylog的Level
   * @since 4.0.3
   */
  private Level toTinyLevel(com.dahuatech.hutool.log.level.Level level) {
    Level tinyLevel;
    switch (level) {
      case TRACE:
        tinyLevel = Level.TRACE;
        break;
      case DEBUG:
        tinyLevel = Level.DEBUG;
        break;
      case INFO:
        tinyLevel = Level.INFO;
        break;
      case WARN:
        tinyLevel = Level.WARNING;
        break;
      case ERROR:
        tinyLevel = Level.ERROR;
        break;
      case OFF:
        tinyLevel = Level.OFF;
        break;
      default:
        throw new Error(StrUtil.format("Can not identify level: {}", level));
    }
    return tinyLevel;
  }
}