Added skeleton code for delegation pattern iluwatar#324

mikulucky · mikulucky · commit bdacfe30c1bc · 2015-12-26T22:20:53.000Z
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/Controller.java b/delegation/src/main/java/com/iluwatar/delegation/simple/Controller.java
@@ -0,0 +1,14 @@
+package com.iluwatar.delegation.simple;
+
+public abstract class Controller<T extends Printer> {
+
+    private Printer printer;
+
+    public Controller(Printer printer) {
+        this.printer = printer;
+    }
+
+    protected Printer getPrinter() {
+        return printer;
+    }
+}
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/Printer.java b/delegation/src/main/java/com/iluwatar/delegation/simple/Printer.java
@@ -0,0 +1,6 @@
+package com.iluwatar.delegation.simple;
+
+public interface Printer {
+
+    void print(final String message);
+}
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/PrinterController.java b/delegation/src/main/java/com/iluwatar/delegation/simple/PrinterController.java
@@ -0,0 +1,13 @@
+package com.iluwatar.delegation.simple;
+
+public class PrinterController extends Controller implements Printer {
+
+    public PrinterController(Printer printer) {
+        super(printer);
+    }
+
+    @Override
+    public void print(String message) {
+        getPrinter().print(message);
+    }
+}
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/printers/CanonPrinter.java b/delegation/src/main/java/com/iluwatar/delegation/simple/printers/CanonPrinter.java
@@ -0,0 +1,12 @@
+package com.iluwatar.delegation.simple.printers;
+
+import com.iluwatar.delegation.simple.Printer;
+
+public class CanonPrinter implements Printer {
+
+    @Override
+    public void print(String message) {
+        System.out.println("Canon Printer : " + message);
+    }
+
+}
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/printers/EpsonPrinter.java b/delegation/src/main/java/com/iluwatar/delegation/simple/printers/EpsonPrinter.java
@@ -0,0 +1,12 @@
+package com.iluwatar.delegation.simple.printers;
+
+import com.iluwatar.delegation.simple.Printer;
+
+public class EpsonPrinter implements Printer{
+
+    @Override
+    public void print(String message) {
+        System.out.println("Epson Printer : " + message);
+    }
+
+}
diff --git a/delegation/src/main/java/com/iluwatar/delegation/simple/printers/HPPrinter.java b/delegation/src/main/java/com/iluwatar/delegation/simple/printers/HPPrinter.java
@@ -0,0 +1,12 @@
+package com.iluwatar.delegation.simple.printers;
+
+import com.iluwatar.delegation.simple.Printer;
+
+public class HPPrinter implements Printer {
+
+    @Override
+    public void print(String message) {
+        System.out.println("HP Printer : " + message);
+    }
+
+}
diff --git a/delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java b/delegation/src/test/java/com/iluwatar/delegation/simple/AppTest.java
@@ -0,0 +1,24 @@
+package com.iluwatar.delegation.simple;
+
+import com.iluwatar.delegation.simple.printers.CanonPrinter;
+import com.iluwatar.delegation.simple.printers.EpsonPrinter;
+import com.iluwatar.delegation.simple.printers.HPPrinter;
+
+public class AppTest {
+
+    public static final String MESSAGE_TO_PRINT = "hello world";
+
+    public static void main(String args[]) {
+        Printer hpPrinter = new HPPrinter();
+        Printer canonPrinter = new CanonPrinter();
+        Printer epsonPrinter = new EpsonPrinter();
+
+        PrinterController hpPrinterController = new PrinterController(hpPrinter);
+        PrinterController canonPrinterController = new PrinterController(canonPrinter);
+        PrinterController epsonPrinterController = new PrinterController(epsonPrinter);
+
+        hpPrinterController.print(MESSAGE_TO_PRINT);
+        canonPrinterController.print(MESSAGE_TO_PRINT);
+        epsonPrinterController.print(MESSAGE_TO_PRINT);
+    }
+}
