A lifecycle of a persistent object can be represented as a number of states and transitions between them. These states are formally defined as "int" constants in `org.objectstyle.cayenne.PersistenceState` class. Transitions between states (see the diagram below) occur in response to the application interacting with either persistent objects or Cayenne context. Whenever a transition occurs, Cayenne automatically updates "persistenceState" property of all affected objects by calling `setPersistenceState()`.

A new object state transformations: | A feteched or committed object state transformations: