【关键字】：OxScript,--,Object-oriented,Extension,for,JScript,TM,Preview
【来 源】：http://www.cnblogs.com/Laser_Lu/archive/2005/03/25/125894.html
OxScript -- Object-oriented Extension for JScript(TM) (Preview)
最近在对JScript进行面向对象的扩展，使得大家以后可以在JScript(TM)中定义类，并写出真正的面向对象的代码。
我对扩展了的JScript取了名字，叫OxScript，打算实现的features如下：
OxScript is an Object-Oriented extension for JavaScript.
The following features will be provided by OxScript:
1. class definition;
2. final class;
3. abstract class;
4. inheritance;
5. overriding;
6. abstract function;
7. polymorphism;
8. package;
9. property getter/setter;
10. reflection(readonly);
大体的Specification如下：
[Access Modifiers]
public, protected, private,
static, abstract, final, virtual
[Directives]
$include, $import,
$package, $class,
$field, $method, $property, $event
[Additional Keywords]
extend, implement,
public, protected, private, static,
get, set
[Additional Operators]
classof, raise
[Predefined Classes]
class Package extend Object {
public :
protected :
private :
}
class Class extend Object {
public :
protected :
private :
}
class Member extend Object {
public :
protected :
private :
}
class Field extend Member {
public :
protected :
private :
}
class Method extend Member {
public :
protected :
private :
}
class Property extend Member {
public :
protected :
private :
}
class Event extend Member {
public :
protected :
private :
}
[Class Hierarchy]
OxScript.Object
|--OxScript.Number
|--OxScript.String
|--OxScript.Boolean
|--OxScript.Date
|--OxScript.Array
|--OxScript.Enumerator
|--OxScript.Function
|--OxScript.RegExp
|--OxScript.VBArray
|--OxScript.Error
|--OxScript.ActiveXObject
|
|--OxScript.Reflection.Package
|--OxScript.Class
|--OxScript.Reflection.Member
|--OxScript.Reflection.Field
|--OxScript.Reflection.Method
|--OxScript.Reflection.Property
|--OxScript.Reflection.Event
下面是一段代码示例：
// namespace declarations
var
LaserPackage = $package();
with(LaserPackage) {
// define a class named OxScriptDemo in LaserPackage
$class ([public, final], OxScriptDemo, {extend : OxScript.Object},
// construcltor
function OxScriptDemo() {
// this is the constructor implementation of class LaserPackage.OxScriptDemo
},
{
// public members
public : {
// a field with type of OxScript.Number
field1 : $field (OxScript.Number),
// a method definition
method1 : $method (
function() {
// implementation of method1
}
),
// a property of type OxScript.String having both getter and setter
property1 : $property (
OxScript.String,
{
get : function() {
// getter of property1
},
set : function() {
// setter of property1
}
}
),
// an event declaration
event1 : $event (
function(source, eventArgs) {} // the function declaration of event1 handler
),
// an event handler for event1
event1Handler : $method(
function(source, eventArgs) {
// implementation of event handler
}
),
// the method which demonstrats how to access the class members and raise events
demoMethod : $method (
function() {
// assign a value to field1
this.field1 = 66;
// call method1
this.method1();
// get property1
var str = this.get_property1();
// set property1
this.set_property1(str);
// add a handler to event1
this.event1.add(this.event1Handler);
// raise event1
raise (this.event1);
}
)
},
// protected members
protected : {
// 
},
// private members
private : {
//
}
}
);
}
OxScript其实是巧妙了利用了JScript的灵活的语法和特性，对其进行了一层包装而已，所以不需要任何安装，只需要在页面中引用OxScript.js就可以享用模拟的面向对象编程了。另外OxScript还提供一个比较有用的特性就是可以反射出所类的定义信息，然后可以自动产生出类似VS中ObjectBrowser的参考窗体，罗列出当前页面中所用到的所有的类和它们的成员的定义信息，从而提供programming references来辅助脚本的编写。小弟目前正在全力的开发中（估计一个星期内就可以发布第一个版本了），先贴出设计思想和代码预览，供大家讨论和交流。请大家多提宝贵意见。
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