Analysis
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Evaluate design patterns side by side across intent, tradeoffs, languages, and integration fit.
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Analysis
Pattern comparison
Reviewing 3 patterns.
| Criteria | |||
|---|---|---|---|
| Basics | |||
| Category | structural | creational | behavioral |
| Summary | Separate an abstraction from its implementation so the two can vary independently. | — | — |
| Intent | Decouple abstractions from implementations so they can evolve independently. | Define a creation method behind a common interface so specialized creators can decide which concrete product to instantiate without changing the surrounding workflow. | Represent grammar rules as objects and interpret sentences by evaluating an abstract syntax tree or expression chain. |
| Decision factors | |||
| Problem | When an abstraction is tightly coupled to its implementation, changing one side forces changes in the other and makes the system harder to evolve. | A workflow needs to create one of several related concrete objects, but constructing them directly in client code spreads creation logic and tightly couples the caller to specific implementations. | You need to define a small language or expression grammar and evaluate it consistently across the application. |
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| Integration notes | Bridge is useful when you want one stable abstraction while swapping implementations for providers, environments, or device targets. | Factory Method is useful when framework hooks, integrations, or environment-specific workflows need to create interchangeable implementations behind a stable contract. | Interpreter is useful for calculators, rule engines, simple DSLs, and command parsing systems where a structured grammar must be evaluated. |