Updated foundation classes a bit and added raw access for NBT. This release marks experimental support for custom blocks, and nearly all future Minecraft blocks, and is also the beginning of the gradual transition to the new foundation classes as a replacement of the current BaseBlock, etc. classes.

src/main/java/com/sk89q/jnbt/NBTConstants.java

@@ -62,5 +62,41 @@ public final class NBTConstants {
     private NBTConstants() {
 
     }
+    
+    /**
+     * Convert a type ID to its corresponding {@link Tag} class.
+     * 
+     * @param id type ID
+     * @return tag class
+     * @throws IllegalArgumentException thrown if the tag ID is not valid
+     */
+    public static Class<? extends Tag> getClassFromType(int id) {
+        switch (id) {
+        case TYPE_END:
+            return EndTag.class;
+        case TYPE_BYTE:
+            return ByteTag.class;
+        case TYPE_SHORT:
+            return ShortTag.class;
+        case TYPE_INT:
+            return IntTag.class;
+        case TYPE_LONG:
+            return LongTag.class;
+        case TYPE_FLOAT:
+            return FloatTag.class;
+        case TYPE_BYTE_ARRAY:
+            return ByteArrayTag.class;
+        case TYPE_STRING:
+            return StringTag.class;
+        case TYPE_LIST:
+            return ListTag.class;
+        case TYPE_COMPOUND:
+            return CompoundTag.class;
+        case TYPE_INT_ARRAY:
+            return IntArrayTag.class;
+        default:
+            throw new IllegalArgumentException("Unknown tag type ID of " + id);
+        }
+    }
 
 }