Template method design pattern
The Template Method design pattern defines an algorithm's fixed sequence in a superclass while allowing subclasses to implement or customize selected steps.
Software Design for Python Programmers
The Template Method pattern defines an algorithm's fixed-order skeleton in a superclass while allowing subclasses to implement selected variable steps.
- How it is used
- Structures fixed-order algorithms whose common and varying steps must be maintained across related implementations.
- How deep it goes
- Explains the pattern through sports-report code, superclass responsibilities, subclass variation, benefits, and comparison with Strategy.
- Examples
- Uses baseball and volleyball game reports, with shared headers and footers and sport-specific acquisition, analysis, and printing.
- What you can do after
- Build it from scratch by modeling a shared algorithm in a superclass and delegating selected steps to subclasses.
Read how Software Design for Python Programmers explains template method design pattern →
Object-Oriented Software Design in C++
The Template Method Design Pattern is a behavioral design pattern that defines an algorithm's fixed sequence while allowing subclasses to vary selected steps.
- How it is used
- Structures report-generation algorithms whose sequence stays fixed while data handling, analysis, and presentation vary.
- How deep it goes
- Defines the superclass, template method, common implementations, abstract steps, and concrete report subclasses.
- Examples
- Uses baseball and volleyball game reports, including statistics, bar charts, winning scores, and round-by-round scoring.
- What you can do after
- Build an inheritance-based algorithm skeleton that preserves execution order while allowing subclasses to implement selected steps.
Read how Object-Oriented Software Design in C++ explains template method design pattern →
Related concepts
- design patternkind of · A design pattern is a reusable, general solution structure for a recurring software design problem in a particular context.
- inheritanceuses · Inheritance is a mechanism by which a child type or element receives properties, values, or behavior from a parent, subject to system rules and possible overrides.
- machine learninguses · Machine learning is a field of computational methods in which systems learn patterns or relationships from data to make predictions, decisions, or other outputs.
- strategy design patterncontrasts with · The Strategy design pattern encapsulates interchangeable algorithms or behaviors behind a common interface so they can be selected independently of the code that uses them.
- callbackuses · A callback is a function or other callable supplied to software for invocation later in response to a specified event, condition, or point in execution.
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