Should fix environment, seed and generator-issues.

src/main/java/com/onarandombox/MultiverseCore/MVWorld.java

@@ -69,8 +69,6 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
     private MultiverseCore plugin; // Hold the Plugin Instance.
 
     private Reference<World> world; // A reference to the World Instance.
-    private Environment environment; // Hold the Environment type EG Environment.NETHER / Environment.NORMAL
-    private long seed; // The world seed
     private String name; // The Worlds Name, EG its folder name.
 
     /**
@@ -438,6 +436,12 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
             return world.get().getTime();
         }
     };
+    @Property
+    private Environment environment;
+    @Property
+    private long seed;
+    @Property
+    private String generator;
     // End of properties
     // --------------------------------------------------------------
 
@@ -446,6 +450,7 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
     private Permission ignoreperm;
 
     public MVWorld(boolean fixSpawn) {
+        super();
         if (!fixSpawn) {
             this.adjustSpawn = false;
         }
@@ -570,6 +575,7 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
         this.autoLoad = true;
         this.bedRespawn = true;
         this.worldBlacklist = new ArrayList<String>();
+        this.generator = null;
     }
 
     /**
@@ -791,7 +797,6 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
      */
     @Override
     public Environment getEnvironment() {
-        // This variable is not settable in-game, therefore does not get a property.
         return this.environment;
     }
 
@@ -800,16 +805,14 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
      */
     @Override
     public void setEnvironment(Environment environment) {
-        // This variable is not settable in-game, therefore does not get a property.
-        this.environment = environment;
+        this.setPropertyValueUnchecked("environment", environment);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
-    public Long getSeed() {
-        // This variable is not settable in-game, therefore does not get a property.
+    public long getSeed() {
         return this.seed;
     }
 
@@ -818,8 +821,23 @@ public class MVWorld extends SerializationConfig implements MultiverseWorld {
      */
     @Override
     public void setSeed(long seed) {
-        // This variable is not settable in-game, therefore does not get a property.
-        this.seed = seed;
+        this.setPropertyValueUnchecked("seed", seed);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String getGenerator() {
+        return this.generator;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public void setGenerator(String generator) {
+        this.setPropertyValueUnchecked("generator", generator);
     }
 
     /**

src/main/java/com/onarandombox/MultiverseCore/api/MultiverseWorld.java

@@ -46,7 +46,7 @@ public interface MultiverseWorld {
      * Gets the type of this world. As of 1.2 this will be:
      * FLAT, NORMAL or VERSION_1_1
      * <p>
-     * This is *not* the generator.
+     * This is <b>not</b> the generator.
      *
      * @return The Type of this world.
      */
@@ -104,7 +104,7 @@ public interface MultiverseWorld {
      *
      * @return The Long version of the seed.
      */
-    Long getSeed();
+    long getSeed();
 
     /**
      * Sets the seed of this world.
@@ -113,6 +113,20 @@ public interface MultiverseWorld {
      */
     void setSeed(long seed);
 
+    /**
+     * Gets the generator of this world.
+     *
+     * @return The name of the generator.
+     */
+    String getGenerator();
+
+    /**
+     * Sets the generator of this world.
+     *
+     * @param generator The new generator's name.
+     */
+    void setGenerator(String generator);
+
     /**
      * Gets the help-message for a property.
      * @param property The name of the property.

src/main/java/com/onarandombox/MultiverseCore/utils/WorldManager.java

@@ -142,6 +142,9 @@ public class WorldManager implements MVWorldManager {
             return false;
         }
 
+        // set generator (special case because we can't read it from org.bukkit.World)
+        this.worlds.get(name).setGenerator(generator);
+
         this.saveWorldsConfig();
         return true;
     }
@@ -262,7 +265,17 @@ public class WorldManager implements MVWorldManager {
     }
 
     private boolean doLoad(String name) {
-        return doLoad(WorldCreator.name(name));
+        if (!worldsFromTheConfig.containsKey(name))
+            throw new IllegalArgumentException("That world doesn't exist!");
+
+        MVWorld world = worldsFromTheConfig.get(name);
+        WorldCreator creator = WorldCreator.name(name);
+
+        creator.environment(world.getEnvironment()).seed(world.getSeed());
+        if (world.getGenerator() != null)
+            creator.generator(world.getGenerator());
+
+        return doLoad(creator);
     }
 
     private boolean doLoad(WorldCreator creator) {