Can you describe the main states of the Persistence Context in ORM systems?

In ORM systems such as Hibernate, the Persistence Context manages the lifecycle of objects and their states relative to the database. The main states of an object in the Persistence Context:

• Transient: the object is created in memory but is not associated with a session and not saved in the database. For example, new Entity().
• Persistent: the object is associated with the Persistence Context, tracked by ORM, and changes will be synchronized with the database upon commit or flush.
• Detached: the object was previously persistent, but the session is closed or the object is manually detached. Changes will not be automatically saved.
• Removed: the object is marked for deletion from the database upon the next flush.

Example in Hibernate:

Session session = sessionFactory.openSession();
Entity entity = new Entity(); // transient
session.save(entity); // now persistent
session.evict(entity); // detached
session.delete(entity); // removed
session.close();