mjacobus / koine-attributes

      class HashOf < Base

        def initialize(key_adapter, value_adapter)

          @key_adapter = key_adapter || raise(ArgumentError, 'Invalid key adapter')

          @value_adapter = value_adapter || raise(ArgumentError, 'Invalid value adapter')

          with_default_value({})

        end

        def coerce(hash)

          secure do

            {}.tap do |new_hash|

              hash.each do |key, value|

                key = @key_adapter.coerce(key)

                value = @value_adapter.coerce(value)

                new_hash[key] = value

              end

            end

          end

        end

      end