jms

!Benchmark result


Features

* Small footprint, no dependency, 0.7K minimized+gzip!
* Super fast! See benchmark.
* Work on both server and client side.
* Support CommonJS.
* Support main, singleton, mixin, private properties, Aspect Oriented Programming.
* Plugins mechanism to extend itself.

Setup

JSFace supports both server side (CommonJS) and client side JavaScript (browser).

Browser:

`` html

`

JSFace introduces two variables in browser global scope: jsface and Class. In case you want to use other APIs such as extend, you need to create aliases, for example:

` javascript
var extend = jsface.extend;
`

In NodeJS environment, first install JSFace via npm:

` sh
npm install jsface
`

Then use its APIs, for example:

` javascript
var jsface = require("jsface"),
Class = jsface.Class,
extend = jsface.extend;
`

API

$3

` javascript
var Person = Class({
constructor: function(name, age) {
this.name = name;
this.age = age;
},

toString: function() {
return this.name + "/" + this.age;
}
});

var person = new Person("Rika", 20);
person.toString(); // "Rika/20"
`

$3

` javascript
var Student = Class(Person, {
constructor: function(id, name, age) {
this.id = id;
Student.$super.call(this, name, age); // Invoke parent's constructor
// this.$super(name, age); // This api is removed since v2.1.0
},

toString: function() {
return this.id + "/" + Student.$superp.toString.call(this); // Invoke parent's toString method
// return this.id + "/" + this.$super(); // This api is removed since v2.1.0
}
});

var student = new Student(1, "Rika", 20);
student.toString(); // "1/Rika/20"
`

$3

JSFace supports a special method named main(). It works just similar to Java's main method.

` javascript
Class({
constructor: function(name) {
this.name = name;
},

getName: function() {
return this.name;
},

main: function(Person) { // Class is passed to main() as its first argument
var p = new Person("Rika");

p.getName(); // "Rika"
}
});
`

$3

` javascript
var Util = Class({
$singleton: true,

echo: function(obj) {
return obj;
}
});

Util.echo(2012); // 2012
`

$3

JSFace supports Java-style static properties. Meaning they are accessible on both class and instance levels.

` javascript
var Person = Class({
$statics: {
MIN_AGE: 1,
MAX_AGE: 150,

isValidAge: function(age) {
return age >= this.MIN_AGE && age <= this.MAX_AGE;
}
},

constructor: function(name, age) {
this.name = name;
this.age = age;
}
});

var person = new Person("Rika", 20);

Person.MIN_AGE === person.MIN_AGE; // true
Person.MAX_AGE === person.MAX_AGE; // true
Person.isValidAge(0); // false
person.isValidAge(person.age); // true
`

$3

JSFace supports private static properties, meaning the properties are shared over instances.

` javascript
var Person = Class(function() {
var MIN_AGE = 1, // private variables
MAX_AGE = 150;

function isValidAge(age) { // private method
return age >= MIN_AGE && age <= MAX_AGE;
}

return {
constructor: function(name, age) {
if ( !isValidAge(age)) {
throw "Invalid parameter";
}

this.name = name;
this.age = age;
}
};
});
`

$3

JSFace provides a powerful mechanism to support mixins. Reusable code can be mixed into almost anything.

Mixin can be bound when you define classes:

` javascript
var Options = Class({
setOptions: function(opts) {
this.opts = opts;
}
});

var Events = Class({
bind: function(event, fn) {
return true;
},
unbind: function(event, fn) {
return false;
}
});

var Person = Class({
constructor: function(name, age) {
this.name = name;
this.age = age;
}
});

// Student inherits Person and extends properties from Options and Events
var Student = Class([ Person, Options, Events ], {
constructor: function(id, name, age) {}
});

var student = new Student(1, "Rika", 20);
student.setOptions({ foo: true }); // student.opts === { foo: true }
student.bind(); // true
student.unbind(); // false
`

Or after defining classes:

` javascript
var Student = Class(Person, {
constructor: function(id, name, age) {
});

extend(Student, [ Options, Events ]);
`

Mixin with instance:

` javascript
var person = new Person("Rika", 20);

extend(person, Options);
person.setOptions({ foo: true });
`
Mixin with native classes:

` javascript
extend(String.prototype, {
trim: function() {
return this.replace(/^\s+|\s+$/g, "");
}
});

" Hello World ".trim(); // "Hello World"
`


$3

In browser environment, you might be using another library which also introduces the global namespace Class. JSFace can return the original Class back to the library claims it with a call to jsface.noConflict().

` javascript
jsface.noConflict();

// Code that uses other library's Class can follow here
`

Actually, Class is an alias of jsface.Class:

` javascript
jsface.noConflict();

// Code that uses other library's Class can follow here

// Define classes by using jsface.Class directly
var Person = jsface.Class({
});
`

Plugins

$3

JSFace supports Aspect Oriented Programming (AOP) via simple before/after mechanism. You can apply pointcuts over class constructors, class methods, singleton methods, instance methods. You can even apply pointcuts over native classes.

AOP support is implemented as a standalone plugin.

#### Setup

Browser:

` html

`

then in your code, make an alias to jsface.pointcut:

` javascript
var pointcut = jsface.pointcut;
`

NodeJS:

` javascript
var pointcut = require("jsface.pointcut");
`

#### Applying pointcuts

In JSFace, an advisor is a set of pointcuts you want to apply to a subject. You can apply as many advisors as you want.

` javascript
Person = Class({
constructor: function(name) {
this.name = name;
this.counter = 0;
},
foo: function(n) {
},
bar: function(n) {
}
});

var advisor = {
constructor: {
before: function() {
this.age = 20;
},
after: function() {
this.email = "rika@sample.com";
}
},
foo: function(n) { // sugar syntax, foo:before
this.counter++;
},
bar: {
before: function(n) {
this.counter++;
},
after: function(n) {
this.counter++;
}
}
};

Person = pointcut(Person, advisor);

var person = new Person("Rika");

person.foo();
person.bar();

person.name === "Rika"; // true
person.age === 20; // true
person.email === "rika@sample.com"; // true
person.counter === 3; // true
`

#### Removing pointcuts

Using previous apply pointcut example:

` javascript
// remove all pointcuts bound to constructor and foo
Person = poincut(Person, "remove constructor foo");

// remove advisor, other advisors remained
Person = poincut(Person, "remove", advisor);

// remove all advisors, restore the fresh version of Person
Person = poincut(Person, "remove");
`

$3

$ready plugin is designed to help parent classes to intercept their subclasses' creation. If a class uses $ready,
it notifies itself.

#### Setup

Browser:

` html

`

NodeJS:

` javascript
var ready = require("jsface.ready");
`

#### Sample

` javascript
var Service = Class({
$ready: function(clazz, api, parent) {
var type = (this !== clazz) && api.type;

switch (type) {
case "session":
// do something with subclass clazz when its type is session
break;
case "application":
// do something with subclass clazz when its type is application
break;
}
}
});

var SessionService = Class(Service, {
type: "session"
});

var ApplicationService = Class(Service, {
type: "application"
});
``

Bug tracker

Have a bug? Please create an issue here on GitHub!

Some notes

Method overloadings, type checking, and arguments validation (available in versions prior to 2.0.0) are being implemented as plugins.

More use cases are covered in unit tests
(I'm using QUnit).

License

Copyright (c) 2009-2012 Tan Nhu

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.