Model

Class Diagram

Any application created on ndjin start with a default model.

Application model can be modified dynamically using ModelService.

Common ApplicationModel dataTypes/classes primitives are:

Name	Description
Text	UTF-8 string
Number	any kind of numbers
Date	represented in millisecond since EPOC
File	any kind of file

Specific classes are:

Name	Description
Object	base object inherited by any object of your application
Application	application class that is instantiated once and used has your application entry point
Member	dataType used to specify user level of the member of you application

Object states

When a class (dataType) extends an existing class, it inherit of its states. So basically any class extending Object class automatically gets all its states. Of course each state could be overloaded or you can modify object state model itself to get custom behaviors.

When a transition is applied, a list of operation can be executed. There are two types of operations:

InternalServices Operations: global scope operation implemented inside the engine
DataType/Class Field Operations: operations implemented as member of a class (using scripting language)

Transition	Executed Operations
Create (1)	Instance Create - Instance Edit
Store (2)	User Level Requirement Member - Instance Update - Instance Append to collection
Cancel (3)	Instance Cancel Edition
View (4)
Edit (5)	User Level Requirement Member - Instance Edit
Delete (6)	User Level Requirement Member -Instance Delete
Append (7)	User Level Requirement Member - Instance Append to collection
Remove (8)	User Level Requirement Member - Instance Remove from collection
Move (9)	User Level Requirement Member - Instance Remove from collection - Instance Append to collection
Update (10)	User Level Requirement Member - Instance Update
Cancel (11)	Instance Cancel Edition

To simplify we grouped transitions operations descriptions, but you should be aware that 'View' transition from 'Stored' state is not the same as 'View' transition from 'Edited' state.

By default, operations applied during transition on object are coming from InternalServices.

As you can see, anyone can view content of an object instance when it is in 'Stored' or 'Edited' state, but only members can edit/update values.

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