States of a BusObject |
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The following flow diagram portrays the different states of a BusObject.
The various states are explained in the following table.
Table 1. States of a BusObject
| State | Description |
|---|---|
| N (new) | Indicates that an object has just been created. |
| NI (inserted) | Indicates that an insert () operation has been performed on the object. When the object is changed, it attains the NC (new + changed) state. When the object is committed, it attains the L (loaded) state. |
| NC (new + changed) | Indicates that an object, which has just been created, has been changed. |
| t (transient) | Indicates that the object is independent of any transaction. In such a state, committing a transaction will not affect the object. If an insert () operation is performed on an object in this state, the object attains the NI (inserted) state. |
| L (loaded) | Indicates that the object has just been loaded from the database into a transaction (for example, using a query). It also indicates that currently the object content has not undergone any change. An object attains this state as soon as it is inserted or updated in the database. |
| LC (loaded + changed) | Indicates that the contents of the object are changed. |
| LU (updated) | Indicates that an update () operation has been performed on the object. As soon as one of the attributes of the object is updated, it attains the LC state. |
| LD (deleted) | Indicates that a delete () operation has been performed on the object. |