object.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_Object() {
  var inherit = arguments[this.__init.length];
  if (!inherit) {
    this.__init.apply(this, arguments);
  }
  ++uiUtil_Object.__numOfInstantiatedObjects;
}
uiUtil_Object.__numOfInstantiatedObjects = 0;
uiUtil_Object.prototype.__init = function() {
};
uiUtil_Object.prototype.__toArray = function(collection, start) {
  var arr = new Array();
  for (var i = start; i < collection.length; ++i) {
    arr[i - start] = collection[i];
  }
  return arr;
};
uiUtil_Object.prototype._super = function(optArgN) {
  this.__apply("__init", this.__toArray(arguments, 0));
};
uiUtil_Object.prototype._callSuper = function(method, optArgN) {
  return this.__apply(method, this.__toArray(arguments, 1));
};
uiUtil_Object.prototype.__apply = function(method, optArguments) {
  if (this.__executingClass[method] == null) {
    this.__executingClass[method] = this.constructor;
  }
  var currentClass = this.__executingClass[method];
  this.__executingClass[method] = currentClass.__parentClass;
  try {
    var returnValue = currentClass.__parentPrototype[method].apply(this, optArguments);
  }
  finally {
    this.__executingClass[method] = currentClass;
  }
  return returnValue;
};
uiUtil_Object.prototype.getClassName = function() {
  return uiUtil_Object.getClassName(this.constructor);
};
uiUtil_Object.prototype.toString = function() {
  return this.getClassName() + uiUtil_Object.__numOfInstantiatedObjects;
};
uiUtil_Object._inherits = function(childClass, parentClass) {
  var UNDEFINED_VALUE;
  var count = parentClass.prototype.__init.length;
  var command = "new parentClass(";
  if (count > 0) {
    for (var i = 0; i < count; ++i) {
      command += "UNDEFINED_VALUE, ";
    }
  }
  command += "true);";
  childClass.prototype = eval(command);
  childClass.prototype.constructor = childClass;
  childClass.prototype.__executingClass = new Object();
  childClass.__parentPrototype = parentClass.prototype;
  childClass.__parentClass = parentClass;
  return childClass.prototype;
};
uiUtil_Object.isAssignableFrom = function(class1, class2) {
  var currClass = class2;
  while (currClass != null) {
    if (class1 == currClass) {
      return true;
    }
    currClass = currClass.__parentClass;
  }
  return false;
};
uiUtil_Object.declareClass = function(origClass, parentClass, optUseLogger) {
  return uiUtil_Object.__declareGenericClass(origClass, parentClass,
      ((optUseLogger == null) ? true : optUseLogger),
      uiUtil_Object.__evaluateClassCode);
};
uiUtil_Object.declareSingleton = function(origClass, parentClass, optUseLogger) {
  return uiUtil_Object.__declareGenericClass(origClass, parentClass,
      ((optUseLogger == null) ? true : optUseLogger),
      uiUtil_Object.__evaluateSingletonCode);
};
uiUtil_Object.declareUtil = function(origClass, parentClass) {
  return uiUtil_Object.__declareGenericClass(
      origClass, parentClass, false, uiUtil_Object.__evaluateUtilCode);
};
uiUtil_Object.__declareGenericClass = function(
    origClass, parent, useLogger, codeGenerator) {
  try {
    var classRef = codeGenerator(origClass);
    var newPrototype = uiUtil_Object._inherits(classRef, parent);
    newPrototype.__init = origClass;
    if (useLogger) {
      newPrototype.__logger = uiUtil_Logger.getInstance(classRef);
      classRef.__logger = newPrototype.__logger;
    }
  }
  catch (e) {  
    alert("Error declaring class: " + uiUtil_Object.getClassName(classRef) +
        ".\nCaused by: " + e);
  }
  return classRef;
};
uiUtil_Object.__generateConstructorPrototype = function(origClass) {
  var className = uiUtil_Object.getClassName(origClass);
  return "function " + className + "()";
};
uiUtil_Object.__evaluateUtilCode = function(origClass) {
  var className = uiUtil_Object.getClassName(origClass);
  return eval(
      className + " = " + uiUtil_Object.__generateConstructorPrototype(origClass) + " {" +
      "  throw new uiUtil_CreateException(" +
      "      'This class is not instantiable: ' + this.getClassName());" +
      "};"
  );
};
uiUtil_Object.__evaluateClassCode = function(origClass) {
  var className = uiUtil_Object.getClassName(origClass);
  return eval(
      className + " = " + uiUtil_Object.__generateConstructorPrototype(origClass) + " {" +
      "  var inherit = arguments[this.__init.length];" +
      "  if (!inherit) {" +
      "    this.__init.apply(this, arguments);" +
      "  }" +
      "};"
  );
};
uiUtil_Object.__evaluateSingletonCode = function(origClass) {
  var className = uiUtil_Object.getClassName(origClass);
  return eval(
      "var temp = " + uiUtil_Object.__generateConstructorPrototype(origClass) + " {" +
      "  if (" + className + ".__instance != null) {" +
      "    throw new uiUtil_CreateException(" +
      "        'A singleton cannot have multiple instances: ' + className);" +
      "  }" +
      "  " + className + ".__instance = this;" +
      "  var inherit = arguments[this.__init.length];" +
      "  if (!inherit) {" +
      "    try {" +
      "      this.__init.apply(this, arguments);" +
      "    }" +
      "    catch (e) {" +
      "      " + className + ".__instance = null;" +  
      "      throw e" +  
      "    }" +
      "  }" +
      "};" + 
      "temp.__instance = null;" +
      "temp.getInstance = function() {" +  
      "  if (" + className + ".__instance == null) {" +
      "    new " + className + "();" +
      "  }" +
      "  return " + className + ".__instance;" +
      "};" +
      className + " = temp;"
  );
};
uiUtil_Object.getClassName = function(objectClass) {
  if (objectClass.name == null) {
    return objectClass.toString().replace(
        /(.*\n)*function ([^\(]*)\((.*\n)*.*/, "$2");
  }
  return objectClass.name;  
};
uiUtil_Object.getPropertiesString = function(object) {
  var str = "";
  for (property in object) {
    str += ' ' + property + "=" + this[property];
  }
  return str;
};