Java Community | Help. Code. Learn.•10mo ago

Do I have a possibility to use Flyweight Pattern for this scenario

So I have a order management system CustomerOrder will have multiple food items and a Customer

22 Replies

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Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

public class CustomerOrder {
    private Customer customer;
    private List<AddedFoodItemDAO> orders;

public class CustomerOrder {
    private Customer customer;
    private List<AddedFoodItemDAO> orders;

public class AddedFoodItemDAO {
    private String foodItemName;
    private double price;
    private int qty;
    private CustomizedOptions customizedOptions;

public class AddedFoodItemDAO {
    private String foodItemName;
    private double price;
    private int qty;
    private CustomizedOptions customizedOptions;

Now the CustomizedOptions have multiple sub classes according to the food type so if the food name is Pizza, it will have CustomizedPizzaOptions, if the food name is Burger, it will have CustomizedBurgerOptions

public class CustomizedOptions {
    private  Map<String,Object> keysValue;

    public  Map<String, Object> getKeysValue() {
        return keysValue;
    }

    CustomizedOptions(){
        keysValue = new HashMap<>();
    }
}

public class CustomizedOptions {
    private  Map<String,Object> keysValue;

    public  Map<String, Object> getKeysValue() {
        return keysValue;
    }

    CustomizedOptions(){
        keysValue = new HashMap<>();
    }
}

Sub classes

public class CustomizedPizzaOptions extends CustomizedOptions {

    private String crust;
    private String size;
    private String toppings1;
    private String toppings2;
    private int slices;
    private String cheeseOptions;
    private String description;

public class CustomizedPizzaOptions extends CustomizedOptions {

    private String crust;
    private String size;
    private String toppings1;
    private String toppings2;
    private int slices;
    private String cheeseOptions;
    private String description;

public class CustomizedBurgerOptions extends CustomizedOptions{
    private String cheeseOptions;
    private String heatLevel;
    private String specialIngredients;
    private String vegetable1;
    private String vegetable2;

public class CustomizedBurgerOptions extends CustomizedOptions{
    private String cheeseOptions;
    private String heatLevel;
    private String specialIngredients;
    private String vegetable1;
    private String vegetable2;

Usage and building of an order

       CustomizedOptions customizationOptions = new CustomizedPizzaOptions(crustType, size, topping1, topping2, slices, cheeseOptions, specialNote);
        valueChanged.valueChanged(customizationOptions);

       CustomizedOptions customizationOptions = new CustomizedPizzaOptions(crustType, size, topping1, topping2, slices, cheeseOptions, specialNote);
        valueChanged.valueChanged(customizationOptions);

Once the CustomizedOptions is created here I added the values to the map too, ignore the UI implementation. the point is I added key and value pairs to the map here. Which is useful when you want to show details dynamically.

       if (customizedOptions instanceof CustomizedPizzaOptions customizedPizzaOptions) {
            panelList.add(new CustomizationLabel("crust", customizedPizzaOptions.getCrust()));
            panelList.add(new CustomizationLabel("size", customizedPizzaOptions.getSize()));
            panelList.add(new CustomizationLabel("topping1", customizedPizzaOptions.getToppings1()));
            panelList.add(new CustomizationLabel("topping2", customizedPizzaOptions.getToppings2()));
            panelList.add(new CustomizationLabel("slices", Integer.toString(customizedPizzaOptions.getSlices())));
            panelList.add(new CustomizationLabel("cheese options", customizedPizzaOptions.getCheeseOptions()));
            panelList.add(new CustomizationLabel("description", customizedPizzaOptions.getDescription()));
        }

        orderScrollPaneJPanel.setLayout(new GridLayout(panelList.size(), 1));
        for (CustomizationLabel panel : panelList) {
            orderScrollPaneJPanel.add(panel);
            customizedOptions.getKeysValue().put(panel.getjLabel1().getText(), panel.getjLabel2().getText());
        }

       if (customizedOptions instanceof CustomizedPizzaOptions customizedPizzaOptions) {
            panelList.add(new CustomizationLabel("crust", customizedPizzaOptions.getCrust()));
            panelList.add(new CustomizationLabel("size", customizedPizzaOptions.getSize()));
            panelList.add(new CustomizationLabel("topping1", customizedPizzaOptions.getToppings1()));
            panelList.add(new CustomizationLabel("topping2", customizedPizzaOptions.getToppings2()));
            panelList.add(new CustomizationLabel("slices", Integer.toString(customizedPizzaOptions.getSlices())));
            panelList.add(new CustomizationLabel("cheese options", customizedPizzaOptions.getCheeseOptions()));
            panelList.add(new CustomizationLabel("description", customizedPizzaOptions.getDescription()));
        }

        orderScrollPaneJPanel.setLayout(new GridLayout(panelList.size(), 1));
        for (CustomizationLabel panel : panelList) {
            orderScrollPaneJPanel.add(panel);
            customizedOptions.getKeysValue().put(panel.getjLabel1().getText(), panel.getjLabel2().getText());
        }

    public CustomerOrder createOrder() {
        List<AddedFoodItemDAO> addedFoodItemDAOS = new LinkedList<>();
        for (Component component : myJPanel.getComponents()) {

            if (component instanceof AddedFoodItem) {
                AddedFoodItem foodItem = (AddedFoodItem) component;
                if (foodItem.getCustomizedOptions() == null) {
                    return null;
                }
                addedFoodItemDAOS.add(new AddedFoodItemDAO(
                        foodItem.getFoodItemName(),foodItem.getPrice(),foodItem.getQty(),foodItem.getCustomizedOptions()));

            }
        }

        return new CustomerOrder.Builder().orders(addedFoodItemDAOS).customer(customer).build();
    }

    public CustomerOrder createOrder() {
        List<AddedFoodItemDAO> addedFoodItemDAOS = new LinkedList<>();
        for (Component component : myJPanel.getComponents()) {

            if (component instanceof AddedFoodItem) {
                AddedFoodItem foodItem = (AddedFoodItem) component;
                if (foodItem.getCustomizedOptions() == null) {
                    return null;
                }
                addedFoodItemDAOS.add(new AddedFoodItemDAO(
                        foodItem.getFoodItemName(),foodItem.getPrice(),foodItem.getQty(),foodItem.getCustomizedOptions()));

            }
        }

        return new CustomerOrder.Builder().orders(addedFoodItemDAOS).customer(customer).build();
    }

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dan1st•10mo ago

What specifically do you want to use the flyway pattern for here? and why?

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

it goes with a Java Swing application Second question for the assignment is to apply Flyweight pattern for the application When choosing customized food options I revealed my solution in the general chat

dan1st•10mo ago

? I mean, you might be able to use it for the CustomizedOptions if you assume that the same CustomizedOptions typically occur multiple times

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

yah when you open the same panel again and again

dan1st•10mo ago

then use it for the CustomizedOptions

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

I shared the solution in the general, my search is not working

dan1st•10mo ago

you mean you already solved it?

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

yah

dan1st•10mo ago

https://canary.discord.com/channels/648956210850299986/653632542100160547/1203938798698762291

john•10mo ago

I guess I figured out the Interpreter Pattern for my application

dan1st•10mo ago

probably that thing but if you solved it, I don't need to help you I guess

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

this is interpreter yah it went inactive so I didn't close it

dan1st•10mo ago

then this: https://canary.discord.com/channels/648956210850299986/653632542100160547/1203708825744572536

john•10mo ago

========== I implemetned the Flyweight pattern So I created a Factory

public class CustomizedOptionsFactory {
    private static Map<String, CustomizedOptions> optionsCache = new HashMap<>();


    public static CustomizedOptions createCustomizedOptions(String optionName){

        if(!optionsCache.containsKey(optionName)){
            optionName = optionName.toUpperCase().replace(" ","_");
            if(FoodItemList.PIZZA.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedPizzaOptions());
            }
            if(FoodItemList.PASTA.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedPastaOptions());
            }
            if(FoodItemList.SALAD.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedSaladOptions());
            }
            if(FoodItemList.BURGER.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedBurgerOptions());
            }if(FoodItemList.ICE_CREAM.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedIceCreamOptions());
            }
        }
        return optionsCache.get(optionName);
    }
}

public class CustomizedOptionsFactory {
    private static Map<String, CustomizedOptions> optionsCache = new HashMap<>();


    public static CustomizedOptions createCustomizedOptions(String optionName){

        if(!optionsCache.containsKey(optionName)){
            optionName = optionName.toUpperCase().replace(" ","_");
            if(FoodItemList.PIZZA.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedPizzaOptions());
            }
            if(FoodItemList.PASTA.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedPastaOptions());
            }
            if(FoodItemList.SALAD.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedSaladOptions());
            }
            if(FoodItemList.BURGER.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedBurgerOptions());
            }if(FoodItemList.ICE_CREAM.name().equals(optionName)){
                optionsCache.put(optionName,new CustomizedIceCreamOptions());
            }
        }
        return optionsCache.get(optionName);
    }
}

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

yes sir

dan1st•10mo ago

it's fine, I just saw the thing in #help-notifications lol

Rag...JN 🌌 🦡 👽 💰 🐊OP•10mo ago

thank you for being kind enough to looking into the thread

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Do I have a possibility to use Flyweight Pattern for this scenario