One Into Many
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== Solution == | == Solution == | ||
| + | # If the class/object implements a [[Singleton]] pattern, remove the code required to save a single instance. | ||
| + | # If it is a simple case of an object only being held by another object once when multiple are required, use a collection like a Set or List to encapsulate these objects. | ||
| + | ## Refactor to change any existing getter/setter methods if required. | ||
| + | # If a more complex problem exists, follow these steps: | ||
| + | ## ... | ||
== See Also == | == See Also == | ||
Revision as of 06:23, 10 August 2009
Contents |
Overview
This pattern is to be used in cases where a previous implementation has a one to one relationship and it needs to be modified to a one to many relationship. This pattern is specifically designed for Objects; however it may be used for lower or higher level concepts.
The Problem
During initial coding/design, you failed to notice that a relationship had the potential to be one-to-many and instead coded it as one-to-one. Now, you realise your problem and need to rectify it.
General Issues
Solution
- If the class/object implements a Singleton pattern, remove the code required to save a single instance.
- If it is a simple case of an object only being held by another object once when multiple are required, use a collection like a Set or List to encapsulate these objects.
- Refactor to change any existing getter/setter methods if required.
- If a more complex problem exists, follow these steps:
- ...
