Initial commit

interface-segregation-event/interface-segregation-event.iml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+  <component name="SonarLintModuleSettings">
+    <option name="uniqueId" value="753620d6-4acf-4f38-b43f-8468316cd5c4" />
+  </component>
+</module>

interface-segregation-event/src/de/clientside/Main.java

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+package de.clientside;
+
+
+
+
+
+import de.tiere.PigTooFatListener;
+import de.tiere.Schwein;
+
+public class Main {
+
+	private Metzger metzger = new Metzger();
+	private Spediteur spediteur = new Spediteur();
+	public static void main(String[] args) {
+
+		new Main().run();
+	}
+
+	private void run() {
+		Schwein schwein = new Schwein("Miss Piggy");
+		schwein.addPigTooFatListener(new SchweineMetzgerAdapter());
+		schwein.addPigTooFatListener(s-> spediteur.fahren(s));
+		schwein.addPigTooFatListener(spediteur::fahren);
+		for (int i = 0; i < 11; i++) {
+			schwein.fuettern();
+		}
+
+
+	}
+
+	class SchweineMetzgerAdapter implements PigTooFatListener{
+
+		@Override
+		public void pigTooFat(final Schwein dickesSchwein) {
+			metzger.schlachten(dickesSchwein);
+		}
+	}
+
+}
+
+class Metzger  {
+
+	public void schlachten(final Object tier) {
+		System.out.println("Messer wetz!");
+	}
+}
+
+class Spediteur {
+	public void fahren(final Object ware) {
+		System.out.println("Wir fahren auf der Autobahn");
+	}
+}
+
+
+

interface-segregation-event/src/de/tiere/PigTooFatListener.java

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+package de.tiere;
+
+public interface PigTooFatListener {
+	
+	void pigTooFat(Schwein dickesSchwein /* sender */);
+
+}

interface-segregation-event/src/de/tiere/Schwein.java

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+package de.tiere;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Schwein {
+	
+	private List<PigTooFatListener> pigTooFatListeners = new ArrayList<>();
+	
+	public void addPigTooFatListener(PigTooFatListener listener) {
+		pigTooFatListeners.add(listener);
+	}
+	
+	public void removePigTooFatListener(PigTooFatListener listener) {
+		pigTooFatListeners.remove(listener);
+	}
+	
+	
+	private void firePigTooFatEvent() {
+		for (PigTooFatListener pigTooFatListener : pigTooFatListeners) {
+			pigTooFatListener.pigTooFat(this);
+		}
+	}
+	
+	private String name;
+	private int gewicht;
+	
+	public Schwein() {
+		this("nobody");
+	}
+
+	public Schwein(String name) {
+		this.gewicht = 10;
+		this.name = name;
+	}
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public int getGewicht() {
+		return gewicht;
+	}
+
+	private void setGewicht(int gewicht) {
+		this.gewicht = gewicht;
+		if(this.gewicht > 20) firePigTooFatEvent();
+	}
+
+	public void fuettern() {
+
+        setGewicht(getGewicht() + 1);
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder builder = new StringBuilder();
+		builder.append("Schwein [name=");
+		builder.append(name);
+		builder.append(", gewicht=");
+		builder.append(gewicht);
+		builder.append("]");
+		return builder.toString();
+	}
+	
+
+}