2-level-undergrd Java code refactoring, unit test, UML diagram assignment
Your job is to (i) create a design for the additions, (ii) implement the additions, (iii) create unittests for the additions, and (iv) identify opportunities for class-implementation and class-inter-face refactoring, and (v) do some refactoring where appropriate. May the source be with you!Task1. Review the old specification (specification.pdf) in the docs directory. You will ab-solutely need to understand it and the code you are extending.2. Review the extension specification at the end of this document, which describes all the ex-tensions to be done.3. Design and implement the extensions using the best-practices we discussed in class.4. Provide a readable, professional looking UML diagram of the updated design. This should bea PDF file called design.pdf in the docs directory.5. For each new class that you implement, you must provide unit tests in the form of Junit5tests. You should design your classes and modify existing classes to facilitate the testing.6. In a file in the docs directory called refactoring.txt list all the class-implementationand class-interface refactoring that you will do and refactoring that you would recommend.7. Perform any class-implementation and class-interface refactoring that you promised to do.8. Bonus: Research the Factory pattern that is used to instantiate classes derived from the samesuperclass or interface. E.g., all the JSON values could instead implement a Value interfaceor be subclasses of an abstract Value class and be constructed by a new ValueFactory classinstead of Value. Implement the Factory pattern to improve the creation of Values in Value.Be sure to update the UML diagram and provide unit tests.
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