From d188a1126a4d4d5cd332cdc40b7a61f13290c55f Mon Sep 17 00:00:00 2001
From: Thomas Smits <thomsmits@gmail.com>
Date: Thu, 18 Jan 2024 15:19:30 +0100
Subject: [PATCH] Corrected link

---
 Assignment_076/solution/readme.md             |  2 +-
 .../java/pr2/lambda/observer/Beobachter.java  |  5 ++++
 .../java/pr2/lambda/observer/Datenhalter.java | 24 +++++++++++++++++++
 .../lambda/observer/DatenhalterAnonym.java    | 20 ++++++++++++++++
 .../lambda/observer/test/BeobachterTest.java  | 18 ++++++++++++++
 5 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 solutions/src/main/java/pr2/lambda/observer/Beobachter.java
 create mode 100644 solutions/src/main/java/pr2/lambda/observer/Datenhalter.java
 create mode 100644 solutions/src/main/java/pr2/lambda/observer/DatenhalterAnonym.java
 create mode 100644 solutions/src/main/java/pr2/lambda/observer/test/BeobachterTest.java

diff --git a/Assignment_076/solution/readme.md b/Assignment_076/solution/readme.md
index 657e078..fe048c7 100644
--- a/Assignment_076/solution/readme.md
+++ b/Assignment_076/solution/readme.md
@@ -2,4 +2,4 @@
 
 Musterlösung:
 
-pr2.lambda.observer](../../solutions/src/main/java/pr2/lambda/observer/).
+[pr2.lambda.observer](../../solutions/src/main/java/pr2/lambda/observer/).
diff --git a/solutions/src/main/java/pr2/lambda/observer/Beobachter.java b/solutions/src/main/java/pr2/lambda/observer/Beobachter.java
new file mode 100644
index 0000000..98eb441
--- /dev/null
+++ b/solutions/src/main/java/pr2/lambda/observer/Beobachter.java
@@ -0,0 +1,5 @@
+package pr2.lambda.observer;
+
+public interface Beobachter {
+    int getValue();
+}
diff --git a/solutions/src/main/java/pr2/lambda/observer/Datenhalter.java b/solutions/src/main/java/pr2/lambda/observer/Datenhalter.java
new file mode 100644
index 0000000..d3e2218
--- /dev/null
+++ b/solutions/src/main/java/pr2/lambda/observer/Datenhalter.java
@@ -0,0 +1,24 @@
+
+package pr2.lambda.observer;
+
+public class Datenhalter {
+
+    private final int geheimerWert;
+
+    public Datenhalter(int geheimerWert) {
+        this.geheimerWert = geheimerWert;
+    }
+
+    public Beobachter getBeobachter() {
+        return new BeobachterImpl();
+    }
+
+    private class BeobachterImpl implements Beobachter {
+
+        @Override
+        public int getValue() {
+            return geheimerWert;
+        }
+
+    }
+}
diff --git a/solutions/src/main/java/pr2/lambda/observer/DatenhalterAnonym.java b/solutions/src/main/java/pr2/lambda/observer/DatenhalterAnonym.java
new file mode 100644
index 0000000..fe4b99f
--- /dev/null
+++ b/solutions/src/main/java/pr2/lambda/observer/DatenhalterAnonym.java
@@ -0,0 +1,20 @@
+
+package pr2.lambda.observer;
+
+public class DatenhalterAnonym {
+
+    private final int geheimerWert;
+
+    public DatenhalterAnonym(int geheimerWert) {
+        this.geheimerWert = geheimerWert;
+    }
+
+    public Beobachter getBeobachter() {
+        return new Beobachter() {
+            @Override
+            public int getValue() {
+                return geheimerWert;
+            }
+        };
+    }
+}
diff --git a/solutions/src/main/java/pr2/lambda/observer/test/BeobachterTest.java b/solutions/src/main/java/pr2/lambda/observer/test/BeobachterTest.java
new file mode 100644
index 0000000..c3d9e72
--- /dev/null
+++ b/solutions/src/main/java/pr2/lambda/observer/test/BeobachterTest.java
@@ -0,0 +1,18 @@
+
+package pr2.lambda.observer.test;
+
+import org.junit.jupiter.api.Test;
+import pr2.lambda.observer.Beobachter;
+import pr2.lambda.observer.Datenhalter;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class BeobachterTest {
+
+    @Test
+    void testBeobachter() {
+        Datenhalter dh = new Datenhalter(42);
+        Beobachter b = dh.getBeobachter();
+        assertEquals(42, b.getValue());
+    }
+}