Visitor Design Pattern - Visitor Cook party project

Cook visits at party location for cooking

Author: premaseem

pattern/src/com/premaseem/Client.java

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+package com.premaseem;
+
+import java.util.Scanner;
+
+public class ClientFile {
+
+	public static void main(String[] args) {
+
+		System.out.println("Welcome to Party host example which uses visitor pattern ");
+		Scanner scan = new Scanner(System.in);
+		Party party;
+		CookVisitorI visitorCook;
+		int repeatRunFlag = 1;
+		while (repeatRunFlag == 1) {
+			System.out.println("Which party do you want to host ");
+			System.out.println("press 1 for Week end party ");
+			System.out.println("press 2 for Week day party ");
+			int tvType = scan.nextInt();
+			if (tvType == 1) {
+				party = new LoudParty();
+			} else {
+				party = new CalmParty();
+			}
+
+			System.out.println("How would you want to manage cooking of food  ");
+			System.out.println(" Press 1 for a visitor Veg Cook ");
+			System.out.println(" Press 2 for a visitor Non- Veg Cook  ");
+			System.out.println(" Press 3 for in house cooking (no visitor) ");
+
+			int type = scan.nextInt();
+			try {
+				switch (type) {
+				case 1:
+					visitorCook = new VegCookVisitor();
+					party.accept(visitorCook);
+					break;
+				case 2:
+					visitorCook = new NonVegCookVisitor();
+					party.accept(visitorCook);
+					break;
+				case 3:
+					party.cookInHouse();
+					break;
+				}
+				
+				
+			} catch (Exception e1) {
+				e1.printStackTrace();
+			}
+			System.out.println("=============================");
+			System.out.println("Press 1 to Repeat .... ");
+			try {
+				repeatRunFlag = scan.nextInt();
+			} catch (Exception e) {
+				repeatRunFlag = 0;
+			}
+
+		}
+	}
+}

patternBonus/src/com/premaseem/Client.java

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+package com.premaseem;
+
+public interface CookVisitorI {
+	void cook (LoudParty loudParty);
+	void cook (CalmParty calmParty);
+}
+
+class VegCookVisitor implements CookVisitorI{
+
+	@Override
+    public void cook(LoudParty loudParty) {
+		loudParty.meal = "Spicy Vegetables";
+		loudParty.drink = "Fruit Beer";
+		loudParty.music = "Loud music";
+		loudParty.getPartyDetail();
+    }
+
+	@Override
+    public void cook(CalmParty calmParty) {
+		calmParty.meal = "Boiled Vegetables";
+		calmParty.drink = "Fruit Juice";
+		calmParty.music = "Meditation Music";
+		calmParty.getPartyDetail();
+    }
+}
+
+class NonVegCookVisitor implements CookVisitorI{
+
+	@Override
+    public void cook(LoudParty loudParty) {
+		loudParty.meal = "Spicy chicken";
+		loudParty.drink = "Beer";
+		loudParty.music = "High Beat music";
+		loudParty.getPartyDetail();
+    }
+
+	@Override
+    public void cook(CalmParty calmParty) {
+		calmParty.meal = "Non spicy chicken";
+		calmParty.drink = "Fruit Beer";
+		calmParty.music = "Meditation music";
+		calmParty.getPartyDetail();
+    }
+}

patternBonus/src/com/premaseem/ClientFile.java

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+package com.premaseem;
+
+public abstract class Party {
+
+	String music = " No Music";
+	String meal = " empty";
+	String drink = "plane water ";
+	CookVisitorI visitor = null;
+
+	abstract void accept(CookVisitorI visitor);
+
+
+	String getPartyDetail() {
+		String detials = visitor!= null ?visitor.getClass().getSimpleName() : "in house cooking"  + " organized " + this.getClass().getSimpleName() + " has Music : " + music + " with Drink :"
+		        + drink + " & Meal : " + meal;
+		System.out.println(detials);
+		return detials;
+	}
+	
+    public void cookInHouse() {
+		meal = "Spicy Vegetables";
+		drink = "in house drink";
+		music = "DJ music";
+		getPartyDetail();	    
+    }
+
+}
+
+class LoudParty extends Party {
+
+	@Override
+	void accept(CookVisitorI visitor) {
+		this.visitor = visitor;
+		visitor.cook(this);
+	}
+}
+
+class CalmParty extends Party {
+
+	@Override
+	void accept(CookVisitorI visitor) {
+		this.visitor = visitor;
+		visitor.cook(this);
+	}
+}
+