ORM Interfaces

Maybe it's will base for my custom js-orm, maybe not:), but I think it's a helpful interfaces let see them:

NullObject<T> 

It's has few simple methods for works with DTO or Entity object, for example:

• isExists - check its empty object or not
• isChanged - check, are you changed original object or not
• isSaved - check, are you saved changed or new object or not
• getDiff - get difference between original object and current his state
• setProperties - it's method for initialization NullObject, you'll can set you properties there
• toSimpleObject - get original object without NullObject abstraction

Selectable<T>

It's simple interface for select by search condition (S) and return NullObject or NullObject collection, its has one method

• find - by criteria and optional params - order

Writable<T>

It's simple interface for write to your storage with methods:

• bulkUpdate
• bulkSave
• bulkDelete
• save
• delete

And, for comfort ORM interface - combine Selectable and Writable