![]() In other words, design snippets are partial but not local. Design snippets assist in this task by providing both information about the current unit and relevant information about other parts of the codebase. ![]() When evaluating a single unit of a codebase, engineers often need to consider the unit’s relationships with other parts of the codebase. Co-display of design snippets and code creates a shared context that increases the com- prehensibility of snippets and allows the software engineer to focus more easily on design details related to a unit of interest. ![]() The usage scenario assumes that software engineers will view code and design snippets at the same time or in the same small time frame. A design snippet is a partial, lightweight design representation that is displayed with an associated unit of code and is useful for design evaluation. ![]() The Design Snippets Tool generates partial design representations ( design snippets ) from code. A well-implemented factory could encapsulate the creation of TextBox instances and their associated formats from the InputForm class and thus remove the coupling between InputForm and the Format subclasses. Alter- natively, a restructuring may also include application of the Factory pattern. Because InputForm is a simple application, this feature of Strategy may be acceptable. In other words, the InputForm must still know which of the Format subclasses to instantiate when creating a text field. As stated in the Design Patterns book, a known feature (or flaw, depending on your perspective) of the Strategy pattern is that “clients must be aware of different Strategies”. These changes would encapsulate input validation details behind the Format interface. Format subclasses would be responsible for preparing the format strings used in createTextBoxes. Format would be changed into a class and would hold general constants likely to be used by multiple Format subclasses. Input validation would be performed by the three format classes, not TextBox. plausible solution to the task is to apply the Strategy pattern to the application.
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