added factory method sample

factory-method/pom.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>com.iluwatar</groupId>
+    <artifactId>java-design-patterns</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <groupId>com.iluwatar</groupId>
+  <artifactId>factory-method</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <name>factory-method</name>
+  <url>http://maven.apache.org</url>
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>

factory-method/src/main/java/com/iluwatar/App.java

@@ -0,0 +1,22 @@
+package com.iluwatar;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+    	Blacksmith blacksmith;
+    	Weapon weapon;
+    	
+    	blacksmith = new OrcBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.AXE);
+    	System.out.println(weapon);
+    	
+    	blacksmith = new ElfBlacksmith();
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SHORT_SWORD);
+    	System.out.println(weapon);
+    	weapon = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+    	System.out.println(weapon);
+    }
+}

factory-method/src/main/java/com/iluwatar/Blacksmith.java

@@ -0,0 +1,7 @@
+package com.iluwatar;
+
+public interface Blacksmith {
+
+	Weapon manufactureWeapon(WeaponType weaponType);
+	
+}

factory-method/src/main/java/com/iluwatar/ElfBlacksmith.java

@@ -0,0 +1,9 @@
+package com.iluwatar;
+
+public class ElfBlacksmith implements Blacksmith {
+
+	public Weapon manufactureWeapon(WeaponType weaponType) {
+		return new ElfWeapon(weaponType);
+	}
+
+}

factory-method/src/main/java/com/iluwatar/ElfWeapon.java

@@ -0,0 +1,16 @@
+package com.iluwatar;
+
+public class ElfWeapon implements Weapon {
+
+	private WeaponType weaponType;
+
+	public ElfWeapon(WeaponType weaponType) {
+		this.weaponType = weaponType;
+	}
+
+	@Override
+	public String toString() {
+		return "Elven " + weaponType;
+	}
+	
+}

factory-method/src/main/java/com/iluwatar/OrcBlacksmith.java

@@ -0,0 +1,9 @@
+package com.iluwatar;
+
+public class OrcBlacksmith implements Blacksmith {
+
+	public Weapon manufactureWeapon(WeaponType weaponType) {
+		return new OrcWeapon(weaponType);
+	}
+
+}

factory-method/src/main/java/com/iluwatar/OrcWeapon.java

@@ -0,0 +1,16 @@
+package com.iluwatar;
+
+public class OrcWeapon implements Weapon {
+
+	private WeaponType weaponType;
+
+	public OrcWeapon(WeaponType weaponType) {
+		this.weaponType = weaponType;
+	}
+
+	@Override
+	public String toString() {
+		return "Orcish " + weaponType;
+	}
+	
+}

factory-method/src/main/java/com/iluwatar/Weapon.java

@@ -0,0 +1,5 @@
+package com.iluwatar;
+
+public interface Weapon {
+
+}

factory-method/src/main/java/com/iluwatar/WeaponType.java

@@ -0,0 +1,19 @@
+package com.iluwatar;
+
+public enum WeaponType {
+
+	SHORT_SWORD, SPEAR, AXE;
+
+	@Override
+	public String toString() {
+		String s = "";
+		switch(this) {
+		case SHORT_SWORD: s = "short sword"; break;
+		case SPEAR: s = "spear"; break;
+		case AXE: s = "axe"; break;
+		}
+		return s;
+	}
+	
+	
+}

pom.xml

@@ -20,5 +20,7 @@
   <modules>
     <module>abstract-factory</module>
     <module>builder</module>
+    <module>factory-method</module>
+    <module>shared</module>
   </modules>
 </project>