The Object-Oriented Thought Process, Fourth Edition

Using Object Persistence

Object persistence is another issue that must be addressed in many OO systems. Persistence is the concept of maintaining the state of an object. When you run a program, if you don’t save the object in some manner, the object dies, never to be recovered. These transient objects might work in some applications, but in most business systems, the state of the object must be saved for later use.

Object Persistence

Although the topic of object persistence and the topics in the next section might not be considered true design guidelines, I believe that they must be addressed when designing classes. I introduce them here to stress that they must be addressed early on when designing classes.

In its simplest form, an object ...