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What is pattern design template?
In sewing and fashion design, a pattern is the template from which the parts of a garment are traced onto fabric before being cut out and assembled. Patterns are usually made of paper, and are sometimes made of sturdier materials like paperboard or cardboard if they need to be more robust to withstand repeated use.
What is template method pattern in Java?
Template Method is a behavioral design pattern that allows you to defines a skeleton of an algorithm in a base class and let subclasses override the steps without changing the overall algorithm’s structure.
What do you mean by template method design pattern?
Template method design pattern is to define an algorithm as a skeleton of operations and leave the details to be implemented by the child classes. The overall structure and sequence of the algorithm is preserved by the parent class. Template means Preset format like HTML templates which has a fixed preset format.
How is concreteclass implemented in template method pattern?
ConcreteClass – implements the primitive operations to carry out subclass-specific steps of the algorithm. When a concrete class is called the template method code will be executed from the base class while for each method used inside the template method will be called the implementation from the derived class.
When to use the template method in Java?
The Template Method lets you turn a monolithic algorithm into a series of individual steps which can be easily extended by subclasses while keeping intact the structure defined in a superclass. Use the pattern when you have several classes that contain almost identical algorithms with some minor differences.
When to use base class in template method pattern?
A concrete base class should be used only when customizations hooks are implemented. The template method implemented by the base class should not be overridden. The specific programming language modifiers should be used to ensure this. A particular case of the template method pattern is represented by the hooks.