Adapter design pattern

README.md

@@ -1,2 +1,32 @@
-# DesignPatternsJava9
-This repo consists Gang of Four Design patterns code on Java 9. Each branch in the repository has code of 1 design pattern. Switch repository to try out different design patterns.
+# What is Adapter Design Pattern 
+* Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces. 
+* The Adapter Pattern is also known as Wrapper.
+
+## Diagram
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/adapter-pattern/diagrams/4_1%20Adapter%20Design%20Pattern.jpeg "Diagram")
+
+![Diagram](https://github.com/premaseem/DesignPatternsJava9/blob/adapter-pattern/diagrams/4_1%20Adapter%20design%20pattern%20-%20sequence%20diagram.png "Diagram")
+
+
+### When to use Adapter Design Pattern 
+When you want to create a reusable class that cooperates with classes which don't have compatible interfaces.
+
+### Learn Design Patterns with Java by Aseem Jain
+This repository contains working project code used in video Course by Packt Publication with title "Learn Design Patterns with Java " authored by "Aseem Jain".
+
+### Course link: 
+https://www.packtpub.com/application-development/learn-design-patterns-java-9-video
+
+### ![ http://in.linkedin.com/in/premaseem](https://github.com/premaseem/DesignPatternsJava9/blob/master/linkedin.png "http://in.linkedin.com/in/premaseem") Profile:  http://in.linkedin.com/in/premaseem
+
+### Authors blog on design patterns:
+https://premaseem.wordpress.com/category/computers/design-patterns/
+
+### Software Design pattern community face book page:
+https://www.facebook.com/DesignPatternGuru/
+
+### Note: 
+* This code base will work on Java 9 and above versions. 
+* `diagrams` folders carry UML diagrams.
+* `pattern` folder has code of primary example. 
+* `patternBonus` folder has code of secondary or bonus example.

pattern/src/com/premaseem/Client.java

@@ -1,13 +1,32 @@
 package com.premaseem;
 
+import com.premaseem.phones.GooglePhone;
+import com.premaseem.phones.IPhone;
+
 /*
 @author: Aseem Jain
 @title: Design Patterns with Java 9
 @link: https://premaseem.wordpress.com/category/computers/design-patterns/
-@copyright: 2018 Packt Publication
 */
 public class Client {
     public static void main (String[] args) {
-        System.out.println("Singleton cook example ");
+        System.out.println("Adapter Design Pattern Example ");
+
+        // Created instances of devices
+        IPhone iPhone = new IPhone();
+        GooglePhone googlePhone = new GooglePhone();
+        EarPlug earPlug = new EarPlug();
+
+        // Ear plug is able to take iPhone sound signal
+        String soundSignal = iPhone.getSoundOutput();
+        earPlug.takeSoundInput(soundSignal);
+
+        // Ear plug is not able to take google phone sound signal
+        Integer soundSignals = googlePhone.getSoundOutput();
+
+        // Created adapter to convert signals expected by client
+        EarPlugAdapter earPlugAdapter = new EarPlugAdapter();
+        earPlug.takeSoundInput(earPlugAdapter.convertSoundSignal(soundSignals));
+
     }
 }

pattern/src/com/premaseem/EarPlug.java

@@ -0,0 +1,15 @@
+package com.premaseem;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+public class EarPlug {
+
+    public void takeSoundInput(String inputSignal){
+        System.out.println("playing input signal");
+        System.out.println(inputSignal);
+    }
+
+}

patternBonus/src/com/premaseem/Client.java → pattern/src/com/premaseem/EarPlugAdapter.java

@@ -4,10 +4,10 @@
 @author: Aseem Jain
 @title: Design Patterns with Java 9
 @link: https://premaseem.wordpress.com/category/computers/design-patterns/
-@copyright: 2018 Packt Publication
 */
-public class Client {
-    public static void main (String[] args) {
-        System.out.println("Singleton cook example ");
+public class EarPlugAdapter {
+
+    public String convertSoundSignal(Integer soundSignal){
+        return soundSignal.toString();
     }
 }

pattern/src/com/premaseem/phones/GooglePhone.java

@@ -0,0 +1,14 @@
+package com.premaseem.phones;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+public class GooglePhone {
+
+    public Integer getSoundOutput(){
+
+        return 1001010101;
+    }
+}

pattern/src/com/premaseem/phones/IPhone.java

@@ -0,0 +1,14 @@
+package com.premaseem.phones;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+public class IPhone {
+
+    public String getSoundOutput(){
+
+        return "1001010101";
+    }
+}

patternBonus/src/com/premaseem/adapterPattern/Adapter.java

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+package com.premaseem.adapterPattern;
+
+public interface Adapter {
+
+}
+
+class AmazonCloudAdapter implements ClientBrokerInterface {
+	AmazonCloudProvider adapteeProvider = new AmazonCloudProvider();
+
+	@Override
+	public void start(String id) {
+		adapteeProvider.startVM(id);
+
+	}
+
+	@Override
+	public void stop(String id) {
+		adapteeProvider.stopVM(id);
+	}
+
+	@Override
+	public void restart(String id) {
+		adapteeProvider.rebootVM(id);
+	}
+}
+
+class AzureCloudAdapter implements ClientBrokerInterface {
+	AzureCloudProvider adapteeProvider = new AzureCloudProvider();
+
+	@Override
+	public void start(String id) {
+		adapteeProvider.bootVM(id, "");
+
+	}
+
+	@Override
+	public void stop(String id) {
+		adapteeProvider.terminateVM(id, "");
+	}
+
+	@Override
+	public void restart(String id) {
+		adapteeProvider.rebootVM(id);
+	}
+}
+
+class GoogleCloudAdapter implements ClientBrokerInterface {
+	GoogleCloudProvider adapteeProvider = new GoogleCloudProvider();
+
+	@Override
+	public void start(String id) {
+		adapteeProvider.startVM(id);
+
+	}
+
+	@Override
+	public void stop(String id) {
+		adapteeProvider.shutdownVM(id);
+	}
+
+	@Override
+	public void restart(String id) {
+		adapteeProvider.shutdownVM(id);
+		adapteeProvider.startVM(id);
+	}
+}

patternBonus/src/com/premaseem/adapterPattern/ClientBrokerInterface.java

@@ -0,0 +1,11 @@
+package com.premaseem.adapterPattern;
+
+public interface ClientBrokerInterface {
+/*
+ * This method will help you to start your vm 	
+ */
+	void start(String id);
+	void stop(String id);
+	void restart(String id);
+
+}

patternBonus/src/com/premaseem/adapterPattern/ClientForCloudAdapter.java

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+package com.premaseem.adapterPattern;
+
+import java.util.Scanner;
+
+public class ClientForCloudAdapter {
+
+	public static void main(String[] args) {
+		Scanner scan = new Scanner(System.in);
+		int repeatRunFlag = 1;
+
+
+			System.out.println("This is the Cloud Broker POC which uses command pattern for provisioning for your resources on different cloud provider ");
+
+			System.out.println("Please pick the provider to create VDC (virtual data Center) ");
+			System.out.println(" Press 1 for Amazon Cloud");
+			System.out.println(" Press 2 for Azure Cloud");
+			System.out.println(" Press 3 for Google Cloud ");
+			int vdcType = scan.nextInt();
+
+			ClientBrokerInterface clientinterface;
+
+			switch (vdcType) {
+			case 1:
+				clientinterface = new AmazonCloudAdapter();
+				break;
+			case 2:
+				clientinterface = new AzureCloudAdapter();
+				break;
+			case 3:
+				clientinterface = new GoogleCloudAdapter();
+				break;
+				default :
+					clientinterface = new AmazonCloudAdapter();
+			}
+
+
+			while (repeatRunFlag == 1) {
+			System.out.println(" What do you want to do ");
+			System.out.println(" 1. Start a VM ");
+			System.out.println(" 2. Stop a VM ");
+			System.out.println(" 3. Reboot a VM");
+
+			int taskType = scan.nextInt();
+			switch (taskType) {
+			case 1:
+				clientinterface.start("");
+				break;
+			case 2:clientinterface.stop("");
+				break;
+			case 3:clientinterface.restart("");
+				break;
+			}
+			System.out.println("Do you want to add more tasks before provisioning 1-yes / 0-No and trigger provisioning ");
+			try {
+				repeatRunFlag = scan.nextInt();
+			} catch (Exception e) {
+				repeatRunFlag = 0;
+			}
+		}
+	}
+}

patternBonus/src/com/premaseem/adapterPattern/Provider.java

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+package com.premaseem.adapterPattern;
+
+ class AmazonCloudProvider {
+	 public void startVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " start  ");
+	 }
+
+	 public void stopVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " stop  ");
+	 }
+
+	 public void rebootVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " reboot  ");
+	 }
+ }
+
+ class AzureCloudProvider {
+
+	 public void bootVM(String id, String vdc){
+		 System.out.println(this.getClass().getSimpleName() + " start  ");
+	 }
+
+	 public void terminateVM(String id, String vdc){
+		 System.out.println(this.getClass().getSimpleName() + " stop  ");
+	 }
+
+	 public void rebootVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " reboot  ");
+	 }
+ }
+
+ class GoogleCloudProvider {
+	 public void startVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " start  ");
+	 }
+
+	 public void shutdownVM(String id){
+		 System.out.println(this.getClass().getSimpleName() + " stop  ");
+	 }
+ }
+
+public interface Provider {
+
+}
+