lib/picky/backends/memory/basic.rb in picky-4.26.2 vs lib/picky/backends/memory/basic.rb in picky-4.27.0

@@ -16,16 +16,21 @@
         include Helpers::File
 
         # This file's location.
         #
         attr_reader :cache_path
+        
+        # What hash type to use. Default: ::Hash
+        #
+        attr_reader :hash_type
 
         # An index cache takes a path, without file extension,
         # which will be provided by the subclasses.
         #
-        def initialize cache_path, options = {}
+        def initialize cache_path, hash_type = Hash, options = {}
           @cache_path = "#{cache_path}.memory.#{extension}"
+          @hash_type  = hash_type
           @empty      = options[:empty]
           @initial    = options[:initial]
         end
 
         # The default extension for index files is "index".
@@ -36,11 +41,11 @@
 
         # The empty index that is used for putting the index
         # together before it is dumped into the files.
         #
         def empty
-          @empty && @empty.clone || empty_hash
+          @empty && @empty.clone || hash_type.new
         end
         
         def empty_hash
           # TODO Make this an explicit option.
           if defined? GoogleHashSparseRubyToRuby
@@ -48,13 +53,13 @@
           else
             {}
           end
         end
 
-        # The initial content before loading from file.
+        # The initial content before loading from file/indexing.
         #
         def initial
-          @initial && @initial.clone || {}
+          @initial && @initial.clone || hash_type.new
         end
 
         # Deletes the file.
         #
         def delete
\ No newline at end of file