Add code for assignment 8

5 files changed, 64 insertions, 0 deletions

diff --git a/de/unibayreuth/se/observer/ConcreteObserver.java b/de/unibayreuth/se/observer/ConcreteObserver.java
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+++ b/de/unibayreuth/se/observer/ConcreteObserver.java
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+package de.unibayreuth.se.observer;
+
+public class ConcreteObserver implements Observer {
+
+    public ConcreteObserver(Subject subject) {
+        // TODO
+    }
+
+    @Override
+    public void update(Subject subject) {
+        // TODO
+    }
+
+    public void detach() {
+        // TODO
+    }
+}
diff --git a/de/unibayreuth/se/observer/ConcreteSubject.java b/de/unibayreuth/se/observer/ConcreteSubject.java
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+++ b/de/unibayreuth/se/observer/ConcreteSubject.java
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+package de.unibayreuth.se.observer;
+
+public class ConcreteSubject {
+    // TODO
+}
diff --git a/de/unibayreuth/se/observer/Main.java b/de/unibayreuth/se/observer/Main.java
new file mode 100644
index 0000000..fdf60b3
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+++ b/de/unibayreuth/se/observer/Main.java
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+package de.unibayreuth.se.observer;
+
+public class Main {
+    public static void main(String[] args) {
+        // TODO: Uncomment after resolving all TODOs. No changes are required in the main method.
+        //ConcreteSubject subject = new ConcreteSubject();
+        //ConcreteObserver observer1 = new ConcreteObserver(subject);
+        //ConcreteObserver observer2 = new ConcreteObserver(subject);
+
+        //subject.setValue(5);
+        //observer1.detach();
+        //subject.setValue(1);
+        //observer2.detach();
+        //subject.setValue(3);
+    }
+}
diff --git a/de/unibayreuth/se/observer/Observer.java b/de/unibayreuth/se/observer/Observer.java
new file mode 100644
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+++ b/de/unibayreuth/se/observer/Observer.java
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+package de.unibayreuth.se.observer;
+
+public interface Observer {
+    void update(Subject subject);
+}
diff --git a/de/unibayreuth/se/observer/Subject.java b/de/unibayreuth/se/observer/Subject.java
new file mode 100644
index 0000000..2f0b5bb
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+++ b/de/unibayreuth/se/observer/Subject.java
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+package de.unibayreuth.se.observer;
+
+public abstract class Subject {
+    // TODO
+
+    public Subject() {
+        // TODO
+    }
+
+    void attach(Observer observer) {
+        // TODO
+    }
+
+    void detach(Observer observer) {
+        // TODO
+    }
+
+    protected void fireUpdate() {
+        // TODO
+    }
+}