added lab9 ex1

src/lab9_responsibility_chain/ex1/Email.java

@@ -0,0 +1,9 @@
+package lab9_responsibility_chain.ex1;
+
+public record Email(String subject, EmailType type) {
+
+    @Override
+    public String toString() {
+        return "<" + type + " Email: '" + subject + "'>";
+    }
+}

src/lab9_responsibility_chain/ex1/EmailType.java

@@ -0,0 +1,8 @@
+package lab9_responsibility_chain.ex1;
+
+public enum EmailType {
+    SPAM,
+    FAN,
+    COMPLAINT,
+    NEW_LOC
+}

src/lab9_responsibility_chain/ex1/Handler.java

@@ -0,0 +1,11 @@
+package lab9_responsibility_chain.ex1;
+
+public abstract class Handler {
+    protected Handler successor;
+
+    public void setSuccessor(Handler successor) {
+        this.successor = successor;
+    }
+
+    public abstract void handleEmail(Email email);
+}

src/lab9_responsibility_chain/ex1/Main.java

@@ -0,0 +1,26 @@
+package lab9_responsibility_chain.ex1;
+
+import lab9_responsibility_chain.ex1.handlers.*;
+
+public class Main {
+    public static void main(String[] args) {
+        Handler spamHandler = new SpamHandler();
+        Handler fanHandler = new FanHandler();
+        Handler complaintHandler = new ComplaintHandler();
+        Handler newLocHandler = new NewLocHandler();
+
+        spamHandler.setSuccessor(fanHandler);
+        fanHandler.setSuccessor(complaintHandler);
+        complaintHandler.setSuccessor(newLocHandler);
+
+        Email email1 = new Email("You WON the LoTtErY !!!!!", EmailType.SPAM);
+        Email email2 = new Email("Your company is awesome !", EmailType.FAN);
+        Email email3 = new Email("My children are addicted :(", EmailType.COMPLAINT);
+        Email email4 = new Email("Please come to Sion :)", EmailType.NEW_LOC);
+
+        spamHandler.handleEmail(email1);
+        spamHandler.handleEmail(email2);
+        spamHandler.handleEmail(email3);
+        spamHandler.handleEmail(email4);
+    }
+}

src/lab9_responsibility_chain/ex1/handlers/ComplaintHandler.java

@@ -0,0 +1,16 @@
+package lab9_responsibility_chain.ex1.handlers;
+
+import lab9_responsibility_chain.ex1.Email;
+import lab9_responsibility_chain.ex1.EmailType;
+import lab9_responsibility_chain.ex1.Handler;
+
+public class ComplaintHandler extends Handler {
+    @Override
+    public void handleEmail(Email email) {
+        if (email.type() == EmailType.COMPLAINT) {
+            System.out.println("Forwarding complaint to legal department (" + email + ")");
+        } else if (successor != null) {
+            successor.handleEmail(email);
+        }
+    }
+}

src/lab9_responsibility_chain/ex1/handlers/FanHandler.java

@@ -0,0 +1,16 @@
+package lab9_responsibility_chain.ex1.handlers;
+
+import lab9_responsibility_chain.ex1.Email;
+import lab9_responsibility_chain.ex1.EmailType;
+import lab9_responsibility_chain.ex1.Handler;
+
+public class FanHandler extends Handler {
+    @Override
+    public void handleEmail(Email email) {
+        if (email.type() == EmailType.FAN) {
+            System.out.println("Forwarding fan email to CEO (" + email + ")");
+        } else if (successor != null) {
+            successor.handleEmail(email);
+        }
+    }
+}

src/lab9_responsibility_chain/ex1/handlers/NewLocHandler.java

@@ -0,0 +1,16 @@
+package lab9_responsibility_chain.ex1.handlers;
+
+import lab9_responsibility_chain.ex1.Email;
+import lab9_responsibility_chain.ex1.EmailType;
+import lab9_responsibility_chain.ex1.Handler;
+
+public class NewLocHandler extends Handler {
+    @Override
+    public void handleEmail(Email email) {
+        if (email.type() == EmailType.NEW_LOC) {
+            System.out.println("Forwarding request to business development (" + email + ")");
+        } else if (successor != null) {
+            successor.handleEmail(email);
+        }
+    }
+}

src/lab9_responsibility_chain/ex1/handlers/SpamHandler.java

@@ -0,0 +1,16 @@
+package lab9_responsibility_chain.ex1.handlers;
+
+import lab9_responsibility_chain.ex1.Email;
+import lab9_responsibility_chain.ex1.EmailType;
+import lab9_responsibility_chain.ex1.Handler;
+
+public class SpamHandler extends Handler {
+    @Override
+    public void handleEmail(Email email) {
+        if (email.type() == EmailType.SPAM) {
+            System.out.println("Deleting spam email (" + email + ")");
+        } else if (successor != null) {
+            successor.handleEmail(email);
+        }
+    }
+}