Objects should not be left in an inconsistent state when exceptional conditions arise. Usual techniques for maintaining object consistency include:
- Input validation (for example, method parameters)
- Reordering the logic so that the code capable of resulting in the exceptional condition, executes before the code that modifies the object executes
- Through the use of rollbacks, upon intercepting a failure notification
- Performing required operations on a temporary copy and committing changes to the original object, after their successful completion
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Failing to restore prior object state on method failure can leave the object in an inconsistent state.
Rule Guideline | Severity | Likelihood | Remediation Cost | Priority | Level |
|---|---|---|---|---|---|
EXC11-J | low | probable | high | P2 | L3 |
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