Expand driver functionality

src/main/java/com/massivecraft/massivecore/store/DbFlatfile.java

@@ -53,4 +53,5 @@ public class DbFlatfile extends DbAbstract
 	{
 		return new File(dir, coll.getName());
 	}
+	
 }

src/main/java/com/massivecraft/massivecore/store/Driver.java

@@ -18,6 +18,9 @@ public interface Driver
 	// What collections are in the database?		
 	public Set<String> getCollnames(Db db);
 	
+	// Rename a collection
+	public boolean renameColl(Db db, String from, String to);
+	
 	// Is id X in the collection?
 	public boolean containsId(Coll<?> coll, String id);
 	

src/main/java/com/massivecraft/massivecore/store/DriverFlatfile.java

@@ -59,6 +59,15 @@ public class DriverFlatfile extends DriverAbstract
 		return ret;
 	}
 	
+	@Override
+	public boolean renameColl(Db db, String from, String to)
+	{
+		File dir = ((DbFlatfile)db).dir;
+		File fileFrom = new File(dir, from);
+		File fileTo = new File(dir, to);
+		return fileFrom.renameTo(fileTo);
+	}
+
 	@Override
 	public boolean containsId(Coll<?> coll, String id)
 	{

src/main/java/com/massivecraft/massivecore/store/DriverMongo.java

@@ -59,6 +59,18 @@ public class DriverMongo extends DriverAbstract
 		return ret;
 	}
 	
+	@Override
+	public boolean renameColl(Db db, String from, String to)
+	{
+		if (!this.getCollnames(db).contains(from)) return false;
+		if (this.getCollnames(db).contains(to)) return false;
+		
+		DB mdb = ((DbMongo)db).db;
+		mdb.getCollection(from).rename(to);
+		
+		return true;
+	}
+	
 	@Override
 	public boolean containsId(Coll<?> coll, String id)
 	{