Description
1 Introduction
In Rumeli Hisarüstü, a factory called 1-A Factory produces essential products. Every product has their respective value. In the factory, individual units called holders are responsible for handling the products in the factory line. Each holder is coupled with the previous and the next holder to create a product line. You are tasked with the organization of this product line.
2 Details
You will be given two classes Holder, and Product; and an interface, Factory. You need to write two new classes FactoryImpl, and Project1.
2.1 FactoryImpl
• This class should implement the Factory interface. The overridden methods should work the way they are described in the Javadoc. • This class has three mandatory fields. These fields should be correctly modified inside the overriden methods. private Holder f i r s t private Holder l a s t private I n t e g e r s i z e • You are free to add helper methods.
2.2 Project1
• The main method should be implemented here. This class is the entry point of your program. • You are required to read from the input file and write to the output file. These file paths will be given in the program arguments. • Each input command will be given in a single line. You have to read the input file and write to the output file line by line.
1 CmpE 250 Project 1 Factory
3 Input & Output
3.1 Input
• Add First – Adds a new product at the beginning of the factory line. AF productid productvalue • Add Last – Adds a new product to the end of the factory line. AL productid productvalue • Add – Adds a new product to the given index of the factory line. Prints “Index out of bounds.” if the index is out of bounds. A index productid productvalue • Remove First – Removes the first product from the factory line and prints it.
Prints “Factory is empty.” if the there is no product in the factory. RF • Remove Last – Removes the last product from the factory line and prints it. Prints “Factory is empty.” if the there is no product in the factory. RL • Remove Index – Removes the product in the given index and prints it. Prints “Index out of bounds.” if the index is out of bounds. RI index • Remove Product – Removes the first occurrence of the product with the given value and prints it. Prints “Product not found.” if the product is not in the factory line. RI productvalue
• Find – Prints the product with the given productid. Prints “Product not found.” if the product is not in the factory line. F productid • Get – Prints the product in the given index. Prints “Index out of bounds.” if the index is out of bounds. G index • Update – Updates the value of the product with the given productid to productvalue. Prints “Product not found.” if the product is not in the factory line. U productid productvalue 2
• Filter Duplicates – Removes products such that after the filtering process there is only a single occurrence of each product in the factory line. In the context of this method, duplicate products are products with equal value fields, the id fields are of course unique. FD • Reverse – Reverses the factory line. R • Print – Prints the factory line. P Input file path will be given as the first program argument.
3.2 Output
• Product – Products will be printed in the format below. ( productid, productvalue ) • Factory Line – Factory line will be printed in the format below. { product1, product2, . . . , productn } Output file path will be given as the second program argument.
4 Submission
Your project will be graded automatically. So it’s important that you carefully follow the submission instructions. First, all 5 of your source files, and nothing more, should be collected under Project1/src. Then, you should zip the Project1 folder and rename it to p1_.zip (e.g., p1_2020400999.zip). This zip file will be submitted through moodle. Your program must be runnable through the terminal. We will compile your code with the javac command.
The target version is 17. Hence, it is imperative that your project structure is correct, otherwise you will not be able to get any points from the automatic grading system. The compiled program will be run using java command. Your program should be able to run with full-path arguments.
5 Grading
Grading of this project is based on the automatic compilation and run and the success of your code in test cases. If your code compiles and runs with no error, then you will get 10% of the project grade. 40% of the grade will come from unit tests. We will test each method implementation for the methods in the Factory interface. Each method implementation will have equal weight.
The rest of your grade will be the sum of collected points from each test case. Each test case will have equal weight. Maximum project grade is 100%. 3 Input Corresponding Output Line Explanation P {} Initially the factory line is empty. RF Factory is empty. Cannot remove from the front since the factory is empty. RL Factory is empty. Same as above, but now it’s the end. AF 3 9 (3,9) is added to the front. A 0 2 4 (2,4) is inserted to index 0. AL 5 25 (5,25) is added to the end. A 0 1 1 (1,1) is inserted to index 0. A 3 4 16 (4,16) is inserted to index 3.
AL 6 36 (6,36) is added to the end. AF 7 30 (7,30) is added to the front. P {(7, 30),(1, 1),(2, 4),(3, 9), (4, 16),(5, 25),(6, 36)} Factory line is printed. F 3 (3, 9) Product with id 3 is found and printed. F 20 Product not found. Product with id 20 does not exist. U 4 9 (4, 16) value of the product with id 4 is updated to 9.
The previous product is printed. U 13 21 Product not found. Product with id 13 does not exist. G 0 (7, 30) Product with index 0 is printed. G 17 Index out of bounds. The factory line has 7 products so index 17 is out of bounds. U 1 36 (1, 1) value of the product with id 1 is updated to 36. The previous product is printed. A 21 21 21 Index out of bounds.
There is no product at index 21. FD 2 All duplicates are removed from the factory line. In this case it was (4,9) and (6,36). Prints the number of duplicates removed. P {(7, 30),(1, 36),(2, 4), (3, 9),(5, 25)} Prints the factory line. R {(5, 25),(3, 9),(2, 4), (1, 36),(7, 30)} Reverses the factory line. Prints the new version. RP 9 (3, 9)
Removes the first product with value 9. RP 13 Product not found. No product has value 13. RL (7, 30) Removes and prints the last product. RI 2 (1, 36) Removes and prints the product at index 2. RF (5, 25) Removes and prints the first product. RI 4 Index out of bounds. The factory line has a single product so index 4 is out of bounds. Table 1: Line by line analysis of example input
6 Warnings
• All source codes are checked automatically for similarity with other submissions and exercises from previous years. Make sure you write and submit your own code. Any sign of cheating will be penalized by at least -50 points at first attempt and F grade in case of recurrence. • Make sure you document your code with necessary inline comments and use meaningful variable names. Do not over-comment, or make your variable names unnecessarily long. This is very important for 4 partial grading.
• Do not make changes in Holder.java, Product.java, and Factory.java. • Do not add any files to the source code except Holder.java, Product.java, Factory.java, FactoryImpl.java, and Project1.java. • Make sure that each method in the Factory interface does the operations it is supposed to do. These methods will be individually unit tested.
For example, if there is only one product in the factory and either RF or RL is called, then both first and last fields should be set to null. So basically the three mandatory fields should always be correctly set. • Make sure that the white-spaces in your output is correct. You can disregard the ones at the end of the line.
