What is Template Method design pattern in Java?
The term template method pattern refers to that behavioral pattern that creates a foundation system for an algorithm and changes some of the steps based on subgroups. Thus two different mechanisms possess substantial likenesses but show no reuse of shared interface or operation. However, if similar shifts are needed for both components, all matching efforts must be used.
Template method of design
Based on the information presented above template method pattern is used to define certain procedures and the process of implementing these steps can be placed into subcategories. In other words, a template method of design outlines an algorithm, however, the needed steps for this procedure in presented as subclasses.
When is template design applicable?
There are serval times when a template design can be used by web developers. It is great when you have fixed format for an algorithm but it has varying implementation steps. Additionally, it can be used to avoid code copying and if there is need to present a shared code in the main class and for distinctions in subgroups.
In general, it is used mostly in frameworks. Every framework outfits the standard part of a domain’s design. Then it outlines the customizable algorithm. This process creates a framework that is the main focus while client customizations are less impactful on the design.
Template Classes
A template can be broken down into groups or components called classes. Some of these are the abstract class, concrete class or even the super class.
AbstractClass
This component outlines a template method essentially through the outlining of an algorithm. In addition, it outlines abstract procedures that must be put in place by subgroups.
ConcreteClass
This group implements those abstract operations typically for a super class. Enabling them to carry out special steps for the algorithm. Moreover, this component can override a procedure if it is not needed.
Template and Java Code
When it relates to Java Code template method of design works best in dealing with those steps for reading data, as well as processing it and writing data. It can define generic structure analyzing data. Then the method is implemented by all subgroups. It is then the output is written a CSV file to ensure the same set up for all subcategories. Template design allows you to hide copy code. Plus you can read data from CSV files. Then it provides for looping via the stored CSV files. Moreover, template design in Java creates a foundation for reading data coming from a database and the looping via datasets. In general, when it relates to template method design in java, they are merely methods for code reuse. This allows you to assess common behavior then defer certain behavior to subcategories.
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