var ObjectB = require('objectb');

// define and create new class constructor
var File = ObjectB.Class.define('File', function(class, instance) {

  class.attr({
    DEFAULT_ENCODING: 'utf-8',
    DEFAULT_PATH_SEPARATOR: '/'
  });
  
  class.method({
    joinPath: function(a, b) {
      return [a, b].join(this.class.DEFAULT_PATH_SEPARATOR);
    }
  });
  
  instance.initialize(function(path) {
    this.setPath(path);
  });

  instance.attr({
    path    : null, // name => default value
    content : null,
    size    : null
  });

  instance.method({
    write: function(str) {
      // .....
    },
    save: function() {
      // .....
    }
  });
});

// Class attributes and mathods call
File.DEFAULT_PATH_SEPARATOR; // "utf-8"
File.joinPath(path, filename);

// Create instance
var file = new File(path);

// Setters and getters are created automatically.
// InstanceAttr "foo" generates getFoo(), setFoo(val)
file.getPath(); // === path
file.setContent(val);
file.getSize(); 

// Class detection
file.isa(File); // true
typeof text; // "File"
file instanceof File; // true