Class Read

  • public class Read
extends java.lang.Object
    The Read class is used for reading user input from the console and interacting with a Controller object. It has a Controller object and a Scanner object as instance variables, and provides methods for reading different types of user input and passing them to the Controller. All methods in this class must return something

    • Constructor Summary

      Constructors 
      Constructor Description
      Read()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean changeActive()
      Prompts the user to set a new value for the "active" attribute.
      Client changeClient()
      Prompts the user to enter a client ID and searches for a matching client instance in the controller's list of client instances.
      java.lang.String changeName()
      Prompts the user to enter a new name and validates the input.
      char changeNutriScore()
      Prompts the user to enter a new value for the "nutri score" attribute and validates the input.
      float changePrice()
      Prompts the user to enter a new value for the "price" attribute and validates the input.
      Vendor changeVendor()
      Prompts the user to enter a new vendor ID and searches for the corresponding vendor object.
      float readFloat()
      Reads a string from standard input and attempts to parse it as a float.
      int readInt()
      Reads a string from standard input and attempts to parse it as an integer.
      java.lang.String readMenuOpt()
      Reads a string from standard input and returns it in uppercase.
      int readProductQTY​(int id)
      Reads the quantity of a given product ID from the user input.

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Read

        public Read()

    • Method Detail

      • readMenuOpt

        public java.lang.String readMenuOpt()
        Reads a string from standard input and returns it in uppercase. This method is commonly used to read user input for menu options.
        Returns:
        the user input string in uppercase

      • readInt

        public int readInt()
        Reads a string from standard input and attempts to parse it as an integer. If the input is not a valid integer, an error message is printed and 0 is returned.
        Returns:
        the integer parsed from the user input, or 0 if the input is not a valid integer

      • readFloat

        public float readFloat()
        Reads a string from standard input and attempts to parse it as a float. If the input is not a valid float, an error message is printed and 0 is returned.
        Returns:
        the float parsed from the user input, or 0 if the input is not a valid float

      • changeName

        public java.lang.String changeName()
        Prompts the user to enter a new name and validates the input. If the name is less than 3 characters long, an error message is printed and an empty string is returned. Otherwise, the input is returned as a string and a success message is printed.
        Returns:
        the new name entered by the user as a string, or an empty string if the input is invalid

      • changeActive

        public boolean changeActive()
        Prompts the user to set a new value for the "active" attribute. If the user enters "Y", true is returned and a success message is printed. If the user enters anything else, false is returned and a default message is printed.
        Returns:
        true if the user entered "Y", false otherwise

      • changeNutriScore

        public char changeNutriScore()
        Prompts the user to enter a new value for the "nutri score" attribute and validates the input. If the input is not a single uppercase letter between A and Z, an error message is printed and 0 is returned. Otherwise, the input is returned as a char and a success message is printed.
        Returns:
        the new nutri score entered by the user as a char, or 0 if the input is invalid

      • changePrice

        public float changePrice()
        Prompts the user to enter a new value for the "price" attribute and validates the input. If the input is negative, an error message is printed and 0 is returned. Otherwise, the input is returned as a float and a success message is printed.
        Returns:
        the new price entered by the user as a float, or 0 if the input is invalid

      • changeVendor

        public Vendor changeVendor()
        Prompts the user to enter a new vendor ID and searches for the corresponding vendor object. If a vendor with the specified ID is found, it is returned and a success message is printed. If no vendor with the specified ID is found, null is returned and an error message is printed.
        Returns:
        the updated vendor object with the specified ID, or null if no vendor is found

      • changeClient

        public Client changeClient()
        Prompts the user to enter a client ID and searches for a matching client instance in the controller's list of client instances. If a matching client instance is found, the method returns the client instance and prints "Client updated." If a matching client instance is not found, the method returns null.
        Returns:
        the updated client instance if a matching client is found, or null if no matching client is found

      • readProductQTY

        public int readProductQTY​(int id)
        Reads the quantity of a given product ID from the user input.
        Parameters:
        id - The ID of the product to read the quantity for.
        Returns:
        The quantity of the given product ID read from user input. csharp Copy code Returns 0 if the product ID is not found.