Kuidas jälgib ja registreerib objekti kontekst objekti muudatused edasiseks töötlemiseks?

Object context (for example, in ORM like Entity Framework in C#) tracks changes in objects using a change tracking mechanism. When an object is loaded into the context, it saves its original state.

When properties of the object are changed, the context records these changes by comparing the current state with the original. This allows, when calling the save method (e.g., SaveChanges), to identify which fields have been modified and generate the appropriate SQL queries to update the database.

A simplified example of the mechanism:

var entity = context.Entities.Find(id); // load the object
entity.Name = "New name"; // change the property
context.SaveChanges(); // the context records the change and updates the database

The context can use proxy objects or dynamic change tracking through events or state comparisons.