Add Simple Factory Pattern implementation

Java source code demonstrate simple factory design pattern

pom.xml

@@ -195,6 +195,7 @@
         <module>arrange-act-assert</module>
         <module>transaction-script</module>
         <module>filterer</module>
+        <module>simple-factory</module>
     </modules>
 
     <repositories>

simple-factory/src/main/java/com/iluwatar/simplefactory/App.java

@@ -0,0 +1,16 @@
+package com.iluwatar.simplefactory;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class App {
+	
+	private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+
+	public static void main(String[] args) {
+		Car car1 = CarSimpleFactory.getCar(CarSimpleFactory.carTypes.FORD);
+		Car car2 = CarSimpleFactory.getCar(CarSimpleFactory.carTypes.FERRARI);
+		LOGGER.info(car1.getDescription());
+		LOGGER.info(car2.getDescription());
+	}
+}

simple-factory/src/main/java/com/iluwatar/simplefactory/Car.java

@@ -0,0 +1,10 @@
+package com.iluwatar.simplefactory;
+
+/**
+ * Car interface
+ */
+public interface Car {
+
+	public String getDescription();
+
+}

simple-factory/src/main/java/com/iluwatar/simplefactory/CarSimpleFactory.java

@@ -0,0 +1,29 @@
+package com.iluwatar.simplefactory;
+
+
+/**
+ * Factory of cars
+ */
+public class CarSimpleFactory {
+	
+	/*
+	 * Enumeration for different types of cars
+	 */
+	static enum carTypes {
+		FORD, FERRARI
+	};
+	
+	/*
+	 * Factory method takes as parameter a car type and initiate the appropriate class
+	 */
+	public static Car getCar(carTypes type) {
+		switch (type) {
+		case FORD:
+			return new Ford();
+		case FERRARI:
+			return new Ferrari();
+		default:
+			throw new IllegalArgumentException("Model not supported.");
+		}
+	}
+}

simple-factory/src/main/java/com/iluwatar/simplefactory/Ferrari.java

@@ -0,0 +1,14 @@
+package com.iluwatar.simplefactory;
+
+/**
+ * Ferrari implementation
+ */
+public class Ferrari implements Car {
+	
+	static final String DESCRIPTION = "This is Ferrari.";
+	
+	@Override
+	public String getDescription() {
+		return DESCRIPTION;
+	}
+}

simple-factory/src/main/java/com/iluwatar/simplefactory/Ford.java

@@ -0,0 +1,14 @@
+package com.iluwatar.simplefactory;
+
+/**
+ * Ford implementation
+ */
+public class Ford implements Car {
+
+	static final String DESCRIPTION = "This is Ford.";
+
+	@Override
+	public String getDescription() {
+		return DESCRIPTION;
+	}
+}