3 Keeping objects consistent
This chapter covers
- Keeping classes consistent
- Modeling aggregates that hold complex object relationships
- Implementing validation mechanisms that ensure consistency at all times
A well-designed class encapsulates its data and provides operations to access or manipulate it. These operations ensure that the object remains in a valid state without inconsistencies. Better yet, they do so in a way that the clients of the class don’t even need to know about it.
One of the greatest advantages of object-oriented programming is the ability to ensure that objects are always in a consistent state. Compare it with, say, procedural programming languages like C. In C, you can define data structures (known as structs). However, ...
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