;(function () {
Joose.Proto.Class = function () {
return this.initialize(this.BUILD.apply(this, arguments)) || this
}
var bootstrap = {
VERSION : null,
AUTHORITY : null,
constructor : Joose.Proto.Class,
superClass : null,
name : null,
attributes : null,
methods : null,
meta : null,
c : null,
defaultSuperClass : Joose.Proto.Object,
BUILD : function (name, extend) {
this.name = name
return { __extend__ : extend || {} }
},
initialize: function (props) {
var extend = props.__extend__
this.VERSION = extend.VERSION
this.AUTHORITY = extend.AUTHORITY
delete extend.VERSION
delete extend.AUTHORITY
this.c = this.extractConstructor(extend)
this.adaptConstructor(this.c)
if (extend.constructorOnly) {
delete extend.constructorOnly
return
}
this.construct(extend)
},
construct : function (extend) {
if (!this.prepareProps(extend)) return
var superClass = this.superClass = this.extractSuperClass(extend)
this.processSuperClass(superClass)
this.adaptPrototype(this.c.prototype)
this.finalize(extend)
},
finalize : function (extend) {
this.processStem(extend)
this.extend(extend)
},
//if the extension returns false from this method it should re-enter 'construct'
prepareProps : function (extend) {
return true
},
extractConstructor : function (extend) {
var res = extend.hasOwnProperty('constructor') ? extend.constructor : this.defaultConstructor()
delete extend.constructor
return res
},
extractSuperClass : function (extend) {
var res = extend.isa || this.defaultSuperClass
delete extend.isa
return res
},
processStem : function () {
var superMeta = this.superClass.meta
this.methods = Joose.O.getMutableCopy(superMeta.methods || {})
this.attributes = Joose.O.getMutableCopy(superMeta.attributes || {})
},
initInstance : function (instance, props) {
Joose.O.copyOwn(props, instance)
},
defaultConstructor: function () {
return function (arg) {
var BUILD = this.BUILD
var args = BUILD && BUILD.apply(this, arguments) || arg || {}
var thisMeta = this.meta
thisMeta.initInstance(this, args)
return thisMeta.hasMethod('initialize') && this.initialize(args) || this
}
},
processSuperClass: function (superClass) {
var superProto = superClass.prototype
//non-Joose superclasses
if (!superClass.meta) {
var extend = Joose.O.copy(superProto)
extend.isa = Joose.Proto.Empty
var meta = new this.defaultSuperClass.meta.constructor(null, extend)
superClass.meta = superProto.meta = meta
meta.c = superClass
}
this.c.prototype = Joose.O.getMutableCopy(superProto)
this.c.superClass = superProto
},
adaptConstructor: function (c) {
c.meta = this
if (!c.hasOwnProperty('toString')) c.toString = function () { return this.meta.name }
},
adaptPrototype: function (proto) {
//this will fix weird semantic of native "constructor" property to more intuitive (idea borrowed from Ext)
proto.constructor = this.c
proto.meta = this
},
addMethod: function (name, func) {
func.SUPER = this.superClass.prototype
//chrome don't allow to redefine the "name" property
func.methodName = name
this.methods[name] = func
this.c.prototype[name] = func
},
addAttribute: function (name, init) {
this.attributes[name] = init
this.c.prototype[name] = init
},
removeMethod : function (name) {
delete this.methods[name]
delete this.c.prototype[name]
},
removeAttribute: function (name) {
delete this.attributes[name]
delete this.c.prototype[name]
},
hasMethod: function (name) {
return Boolean(this.methods[name])
},
hasAttribute: function (name) {
return this.attributes[name] !== undefined
},
hasOwnMethod: function (name) {
return this.hasMethod(name) && this.methods.hasOwnProperty(name)
},
hasOwnAttribute: function (name) {
return this.hasAttribute(name) && this.attributes.hasOwnProperty(name)
},
extend : function (props) {
Joose.O.eachOwn(props, function (value, name) {
if (name != 'meta' && name != 'constructor')
if (Joose.O.isFunction(value) && !value.meta)
this.addMethod(name, value)
else
this.addAttribute(name, value)
}, this)
},
subClassOf : function (classObject, extend) {
return this.subClass(extend, null, classObject)
},
subClass : function (extend, name, classObject) {
extend = extend || {}
extend.isa = classObject || this.c
return new this.constructor(name, extend).c
},
instantiate : function () {
var f = function () {}
f.prototype = this.c.prototype
var obj = new f()
return this.c.apply(obj, arguments) || obj
}
}
//micro bootstraping
Joose.Proto.Class.prototype = Joose.O.getMutableCopy(Joose.Proto.Object.prototype)
Joose.O.extend(Joose.Proto.Class.prototype, bootstrap)
Joose.Proto.Class.prototype.meta = new Joose.Proto.Class('Joose.Proto.Class', bootstrap)
Joose.Proto.Class.meta.addMethod('isa', function (someClass) {
var f = function () {}
f.prototype = this.c.prototype
return new f() instanceof someClass
})
})()