Interfaces implementations

flat_world/src/main/java/mc/world/flat/FlatWorld.java

@@ -4,12 +4,14 @@
  */
 package mc.world.flat;
 
+import com.flowpowered.nbt.Tag;
 import lombok.Getter;
 import lombok.Setter;
 import mc.core.Location;
 import mc.core.world.*;
 
 import java.util.UUID;
+import java.util.stream.Stream;
 
 public class FlatWorld implements World {
 
@@ -50,4 +52,19 @@ public class FlatWorld implements World {
     public int getSeed() {
         return 0;
     }
+
+    @Override
+    public Tag<?> getTag(String name) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void setTag(Tag<?> tag) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Stream<Tag<?>> tagStream() {
+        throw new UnsupportedOperationException();
+    }
 }

generated_world/src/main/java/mc/world/generated_world/CubicWorld.java

@@ -1,10 +1,14 @@
 package mc.world.generated_world;
 
+import com.flowpowered.nbt.Tag;
 import lombok.Getter;
 import mc.core.Location;
 import mc.core.world.*;
 
+import java.util.HashMap;
+import java.util.Map;
 import java.util.UUID;
+import java.util.stream.Stream;
 
 public class CubicWorld implements World {
     @Getter
@@ -13,6 +17,7 @@ public class CubicWorld implements World {
     private volatile Location spawnLocation;
     private final transient Object spawnLocationLock = new Object();
     private final transient ChunkLoader chunkLoader;
+    private final Map<String, Tag<?>> nbtTagMap = new HashMap<>();
 
     public CubicWorld(UUID worldId, int seed) {
         this.worldId = worldId;
@@ -86,4 +91,19 @@ public class CubicWorld implements World {
     public int getSeed() {
         return seed;
     }
+
+    @Override
+    public Tag<?> getTag(String name) {
+        return nbtTagMap.get(name);
+    }
+
+    @Override
+    public void setTag(Tag<?> tag) {
+        nbtTagMap.put(tag.getName(), tag);
+    }
+
+    @Override
+    public Stream<Tag<?>> tagStream() {
+        return nbtTagMap.values().stream();
+    }
 }