BuilderKlassen

BuilderKlassen is a term used in software design, especially in German-language contexts, to denote the builder classes that implement the Builder design pattern. They construct complex objects by separating the creation process from the object's final representation. The approach supports producing different representations of an object using the same construction sequence.

In a typical implementation, the product class represents the object being built. A builder interface or abstract class defines the construction steps; one or more concrete builders (the BuilderKlassen) implement these steps to assemble specific representations. An optional director controls the order of step execution, invoking the builder methods and finally returning the built product. Fluent interfaces within builders enable chainable configuration.

Usage scenarios include objects with many optional parameters, complex configuration, or varying representations. The BuilderKlassen pattern is beneficial when the construction process must be independent of the parts that compose the product or when the same steps should yield different results.

Pros include readable construction syntax, safer and more maintainable object creation, and support for immutable products. Cons include increased code volume and potential over-engineering for simple objects, as well as the need to synchronize builder interfaces with the product's structure.

Common languages for discussion include Java and C#, with translations in other languages. In English writing, the term builder classes or the builder pattern is used; in German contexts, BuilderKlassen is the conventional label for the concrete builders. Related patterns include the Fluent interface, telescoping constructor, and abstract factory.