Simplify Region

BauSystem_Main/src/de/steamwar/bausystem/world/Region.java

@@ -231,10 +231,25 @@ public class Region {
 
     public enum ExtensionDirection {
 
-        PositiveZ(),
-        NegativeZ(),
-        PositiveX(),
-        NegativeX()
+        PositiveZ("positivez", "z+"),
+        NegativeZ("negativez", "z-"),
+        PositiveX("positivex", "x+"),
+        NegativeX("negativex", "x-");
+
+        private Set<String> values;
+
+        ExtensionDirection(String... values) {
+            this.values = new HashSet<>(Arrays.asList(values));
+        }
+
+        public static ExtensionDirection getByString(String value) {
+            if (value == null) return null;
+            value = value.toLowerCase();
+            for (ExtensionDirection extensionDirection : values()) {
+                if (extensionDirection.values.contains(value)) return extensionDirection;
+            }
+            return null;
+        }
 
     }
 
@@ -271,28 +286,7 @@ public class Region {
             offsetX = config.getInt("offsetX", 0);
             offsetY = config.getInt("offsetY", 0);
             offsetZ = config.getInt("offsetZ", 0);
-            String extDir = config.getString("extensionFrontDirection", null);
-            if (extDir == null) extensionFrontDirection = null;
-            else {
-                ExtensionDirection extDirection = null;
-                switch (extDir.toLowerCase()) {
-                    case "positivex":
-                        extDirection = ExtensionDirection.PositiveX;
-                        break;
-                    case "negativex":
-                        extDirection = ExtensionDirection.NegativeX;
-                        break;
-                    case "positivez":
-                        extDirection = ExtensionDirection.PositiveZ;
-                        break;
-                    case "negativez":
-                        extDirection = ExtensionDirection.NegativeZ;
-                        break;
-                    default:
-                        break;
-                }
-                extensionFrontDirection = extDirection;
-            }
+            extensionFrontDirection = ExtensionDirection.getByString(config.getString("extensionFrontDirection", null));
             extensionFront = config.getInt("extensionFront", 0);
             extensionBack = config.getInt("extensionBack", 0);
             extensionUp = config.getInt("extensionUp", 0);