Factory Method Pattern Java Implementation #3367

FactoryMethodPattern/Blacksmith.java

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+public interface Blacksmith {
+    Weapon manufactureWeapon(WeaponType weaponType);
+}

FactoryMethodPattern/ElfBlacksmith.java

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+import java.util.HashMap;
+import java.util.Map;
+
+public class ElfBlacksmith implements Blacksmith {
+
+    private static final Map<WeaponType, Weapon> ELF_ARSENAL = new HashMap<>();
+
+    static {
+        ELF_ARSENAL.put(WeaponType.SPEAR, new Weapon("Elven Spear"));
+        ELF_ARSENAL.put(WeaponType.AXE, new Weapon("Elven Axe"));
+    }
+
+    @Override
+    public Weapon manufactureWeapon(WeaponType weaponType) {
+        return ELF_ARSENAL.get(weaponType);
+    }
+}

FactoryMethodPattern/Main.java

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+public class Main {
+    public static void main(String[] args) {
+
+        Blacksmith blacksmith;
+
+        // Orc weapons
+        blacksmith = new OrcBlacksmith();
+        Weapon weapon1 = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+        System.out.println("Orc Blacksmith manufactured: " + weapon1.getName());
+
+        Weapon weapon2 = blacksmith.manufactureWeapon(WeaponType.AXE);
+        System.out.println("Orc Blacksmith manufactured: " + weapon2.getName());
+
+        // Elf weapons
+        blacksmith = new ElfBlacksmith();
+        Weapon weapon3 = blacksmith.manufactureWeapon(WeaponType.SPEAR);
+        System.out.println("Elf Blacksmith manufactured: " + weapon3.getName());
+
+        Weapon weapon4 = blacksmith.manufactureWeapon(WeaponType.AXE);
+        System.out.println("Elf Blacksmith manufactured: " + weapon4.getName());
+    }
+}

FactoryMethodPattern/OrcBlacksmith.java

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+import java.util.HashMap;
+import java.util.Map;
+
+public class OrcBlacksmith implements Blacksmith {
+
+    private static final Map<WeaponType, Weapon> ORC_ARSENAL = new HashMap<>();
+
+    static {
+        ORC_ARSENAL.put(WeaponType.SPEAR, new Weapon("Orcish Spear"));
+        ORC_ARSENAL.put(WeaponType.AXE, new Weapon("Orcish Axe"));
+    }
+
+    @Override
+    public Weapon manufactureWeapon(WeaponType weaponType) {
+        return ORC_ARSENAL.get(weaponType);
+    }
+}

FactoryMethodPattern/Weapon.java

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+public class Weapon {
+    private final String name;
+
+    public Weapon(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

FactoryMethodPattern/WeaponType.java

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+public enum WeaponType {
+    SPEAR,
+    AXE
+}