logger.js

这是一个关于java的JSP页面中使用象Swing组件的一个库文件.

function uiUtil_Logger(loggedClass, logLevel) {
  this._super();
  var className = uiUtil_Type.getTypeName(loggedClass);
  if (uiUtil_Logger.__instances[className] != null) {
    throw new uiUtil_CreateException("There shouldn't be more than one " +
        "instances of logger for the same class: " + className);
  }
  uiUtil_Logger.__instances[className] = this;
  this.__allLevels = new Array();
  this.__loggedClass = loggedClass;
  this.__needDebugPanel = (logLevel != uiUtil_Logger.LEVEL_NONE);
  this.__currentLevel = null;
  this.setLevel(logLevel);
}
uiUtil_Object._inherits(uiUtil_Logger, uiUtil_Object);
uiUtil_Logger.__defaultStream = null;
uiUtil_Logger.__instances = new Object();
uiUtil_Logger.LEVEL_NONE = 0;
uiUtil_Logger.LEVEL_FATAL = 1;
uiUtil_Logger.LEVEL_ERROR = 2;
uiUtil_Logger.LEVEL_WARN = 3;
uiUtil_Logger.LEVEL_INFO = 4;
uiUtil_Logger.LEVEL_DEBUG = 5;
uiUtil_Logger.LEVEL_ALL = 6;
if ((typeof uiGlobal_defaultLevel) == "undefined") {
  uiUtil_Logger.__defaultLevel = uiUtil_Logger.LEVEL_NONE;
}
else {
  uiUtil_Logger.__defaultLevel = uiGlobal_defaultLevel;
}
uiUtil_Logger.prototype.__obtainStream = function(loggedClass) {
  var className = uiUtil_Type.getTypeName(loggedClass);
  var stream = null;
  this.__needDebugPanel = true;
  try {
    stream = uiHtml_DebugPanel.getInstance("Creator: " + className);
    this.__needDebugPanel = false;
  }
  catch (e1) {
    try {
      stream = uiHtml_Document.getInstance().getPrintStream();
    }
    catch (e2) {
      stream = uiUtil_Logger.getDefaultPrintStream();
    }
  }
  return stream;
};
uiUtil_Logger.prototype.setLevel = function(level) {
  this.__currentLevel = level;
  var max = level + 1;  
  for (var i = 0; i < max; ++i) {
    this.__allLevels[i] = true;
  }
};
uiUtil_Logger.prototype.setStream = function(stream) {
  this.__stream = stream;
};
uiUtil_Logger.prototype.getStream = function() {
  if (this.__needDebugPanel) {
    try {
      this.__stream = this.__obtainStream(this.__loggedClass);
    }
    catch (e) {
      throw e;
    }
  }
  return this.__stream;
};
uiUtil_Logger.prototype.__logTo = function(stream, message, level) {
  var levelName;
  switch (level) {
    case uiUtil_Logger.LEVEL_FATAL : levelName = "FATAL";
                                        break;
    case uiUtil_Logger.LEVEL_ERROR : levelName = "ERROR";
                                        break;
    case uiUtil_Logger.LEVEL_WARN  : levelName = "WARN";
                                        break;
    case uiUtil_Logger.LEVEL_INFO  : levelName = "INFO";
                                        break;
    case uiUtil_Logger.LEVEL_DEBUG : levelName = "DEBUG";
                                        break;
  }
  stream.println("[uitags " + levelName + "] " +
      uiUtil_Type.getTypeName(this.__loggedClass) + ": " + message);
};
uiUtil_Logger.prototype.__log = function(message, level) {
  this.__logTo(this.getStream(), message, level);
};
uiUtil_Logger.prototype.fatal = function(message) {
  if (this.__allLevels[uiUtil_Logger.LEVEL_FATAL]) {
    this.__log(message, uiUtil_Logger.LEVEL_FATAL);
  }
};
uiUtil_Logger.prototype.error = function(message) {
  if (this.__allLevels[uiUtil_Logger.LEVEL_ERROR]) {
    this.__log(message, uiUtil_Logger.LEVEL_ERROR);
  }
};
uiUtil_Logger.prototype.warn = function(message) {
  if (this.__allLevels[uiUtil_Logger.LEVEL_WARN]) {
    this.__log(message, uiUtil_Logger.LEVEL_WARN);
  }
};
uiUtil_Logger.prototype.info = function(message) {
  if (this.__allLevels[uiUtil_Logger.LEVEL_INFO]) {
    this.__log(message, uiUtil_Logger.LEVEL_INFO);
  }
};
uiUtil_Logger.prototype.debug = function(message) {
  if (this.__allLevels[uiUtil_Logger.LEVEL_DEBUG]) {
    this.__log(message, uiUtil_Logger.LEVEL_DEBUG);
  }
};
uiUtil_Logger.getInstance = function(optLoggedClass, optLevel) {
  var className = uiUtil_Type.getTypeName(optLoggedClass);
  if (uiUtil_Logger.__instances[className] == null) {
    var level = uiUtil_Type.isDefined(optLevel) ?
        optLevel : uiUtil_Logger.__defaultLevel;
    return new uiUtil_Logger(optLoggedClass, level);
  }
  return uiUtil_Logger.__instances[className];
};
uiUtil_Logger.getDefaultPrintStream = function() {
  if (uiUtil_Logger.__defaultStream == null) {
    uiUtil_Logger.__defaultStream = new uiUtil_Logger.PrintStream();
  }
  return uiUtil_Logger.__defaultStream;
};
function uiUtil_Logger$PrintStream() {
  this._super();
}
uiUtil_Logger.PrintStream =
    uiUtil_Object.declareClass(uiUtil_Logger$PrintStream, uiUtil_Object);
uiUtil_Logger.PrintStream.prototype.print = function(text) {
  alert(text);
};
uiUtil_Logger.PrintStream.prototype.println = function(text) {
  alert(text);
};