Emptiness

An entity level modeling library.

The key concept is to create an entity and entity is like an object in Javascript. In fact it is an object with the value property.

Moreover, entity has a default value (defVal) and validation. Value has to be validated before storing into the entity. Such that behavior can be specified in the validation.

Usage:

var spawn = require('emptiness').spawn,
	en = spawn('entity');	// i.e. enType = spawn('factory name');

var obj = en('something');	// i.e. entity = entityClass.create('something');
assert(obj.value === 'something');

More usage examples can be found under the test folder.

Pre-defined entities:

For all other pre-defined entities, please see the factory folder.

Some other brief concepts:

• Factory creates class.
• Class creates entity.
• Entity is the object which has value property that stores the actual value.

Moreover, there is a helper layer called enType (entity type) between the class and entity.

The fundamental definition of enType is just

enType = entityClass.create.bind(entityClass);

such that we can just type to create an entity.

obj = enType('something');

However, it is better to use typedef.js to create enType.

var typedef = require('emptiness/lib/typedef'),
	entityFactory = require('emptiness/factory/entity'),
	entityClass = entityFactory(),
	en = typedef(entityClass);

For more about enType, please see the lib/typedef.js.

Nevertheless, I would suggest just use spawn for everything.

License:

MIT © 2015 Kei Sing Wong