--- a/src/luan/modules/lucene/Lucene.luan	Tue Jun 18 21:56:53 2019 -0600
+++ b/src/luan/modules/lucene/Lucene.luan	Wed Jun 19 00:26:10 2019 -0600
@@ -37,9 +37,11 @@
 Lucene.literal = SaneQueryParser.literal
 
 function Lucene.index(index_dir,default_type,default_fields)
+	type(index_dir)=="table" or error "index_dir must be table"
+	index_dir.to_uri_string and matches(index_dir.to_uri_string(),"^file:") or error "must be file"
 	local index = {}
 	index.dir = index_dir
-	local java_index, closer = LuceneIndex.getLuceneIndex(index_dir,default_type,default_fields)
+	local java_index, closer = LuceneIndex.getLuceneIndex(index_dir.java.file,default_type,default_fields)
 	index.java = java_index
 	index.closer = closer or error()
 
@@ -145,7 +147,7 @@
 	end
 
 	function index.schedule_backups_to(backup_dir,repeating_delay)
-		local lucene_dir = uri("file:"..index.dir)
+		local lucene_dir = index.dir
 		local function backup()
 			if backup_dir.last_modified() < lucene_dir.last_modified() then
 				run_for_backup(function()
@@ -178,7 +180,7 @@
 
 	function index.restore(zip_file)
 		java_index.run_in_lock( function()
-			local lucene_dir = uri("file:"..index.dir)
+			local lucene_dir = index.dir
 			local before_restore = lucene_dir.parent().child("before_restore.zip")
 			index.zip(before_restore)
 			java_index.doClose()
@@ -197,14 +199,14 @@
 
 		function Rpc.functions.lucene_backup(password)
 			Io.password == password or error "wrong password"
-			local zip_file = uri("file:"..index.dir).parent().child("backup.zip")
+			local zip_file = index.dir.parent().child("backup.zip")
 			index.zip(zip_file)
 			return zip_file
 		end
 
 		function Rpc.functions.lucene_restore(password,zip_file)
 			Io.password == password or error "wrong password"
-			local backup_zip = uri("file:"..index.dir).parent().child("backup.zip")
+			local backup_zip = index.dir.parent().child("backup.zip")
 			backup_zip.write(zip_file)
 			index.restore(backup_zip)
 		end
@@ -217,4 +219,14 @@
 	return index
 end
 
+function Lucene.recover(index_dir,restore_dir)
+	if not index_dir.exists() and restore_dir.exists() then
+		index_dir.mkdir()
+		for _, child in ipairs(restore_dir.children()) do
+			index_dir.child(child.name()).link_to(child)
+		end
+		logger.error "recovered"
+	end
+end
+
 return Lucene