Template Method Pattern

In this problem: You will implement the Template Method pattern in an abstract class DataProcessor, defining the processing skeleton while subclasses CsvProcessor and JsonProcessor provide concrete implementations.

Learning Objective: Understand the Template Method pattern as a design technique using abstract classes

Overview

The DataProcessor abstract class defines the processing skeleton (read, transform, write) in its process() method. Each step is delegated to subclasses as abstract methods.

Specifications

• DataProcessor abstract class:
  • process(): template method (calls readData(), transformData(), writeData() in order)
  • readData(): abstract method (outputs the read step)
  • transformData(): abstract method (outputs the transform step)
  • writeData(): abstract method (outputs the write step)
• CsvProcessor: outputs CSV-specific processing for each step
• JsonProcessor: outputs JSON-specific processing for each step
• In Main, call process() on both processors

Output Format

--- CSV Processing ---
Reading CSV file
Converting CSV to records
Writing records to database
--- JSON Processing ---
Reading JSON file
Parsing JSON to objects
Writing objects to API