[ruby/uri] Simplify construction of URI instances using parser interface.

https://github.com/ruby/uri/commit/c145017dd7

lib/uri/common.rb

@@ -145,6 +145,20 @@ module URI
     @@schemes
   end
 
+  #
+  # Construct a URI instance, using the scheme to detect the appropriate class
+  # from +URI.scheme_list+.
+  # 
+  def self.for(scheme, *arguments, default: Generic)
+    if scheme
+      uri_class = @@schemes[scheme.upcase] || default
+    else
+      uri_class = default
+    end
+
+    return uri_class.new(scheme, *arguments)
+  end
+
   #
   # Base class for all URI exceptions.
   #

lib/uri/rfc2396_parser.rb

@@ -208,21 +208,9 @@ module URI
     #   #=> #<URI::LDAP ldap://ldap.example.com/dc=example?user=john>
     #
     def parse(uri)
-      scheme, userinfo, host, port,
-        registry, path, opaque, query, fragment = self.split(uri)
-
-      if scheme && URI.scheme_list.include?(scheme.upcase)
-        URI.scheme_list[scheme.upcase].new(scheme, userinfo, host, port,
-                                           registry, path, opaque, query,
-                                           fragment, self)
-      else
-        Generic.new(scheme, userinfo, host, port,
-                    registry, path, opaque, query,
-                    fragment, self)
-      end
+      URI.for(*self.split(uri), self)
     end
 
-
     #
     # == Args
     #

lib/uri/rfc3986_parser.rb

@@ -69,18 +69,7 @@ module URI
     end
 
     def parse(uri) # :nodoc:
-      scheme, userinfo, host, port,
-        registry, path, opaque, query, fragment = self.split(uri)
-      scheme_list = URI.scheme_list
-      if scheme && scheme_list.include?(uc = scheme.upcase)
-        scheme_list[uc].new(scheme, userinfo, host, port,
-                            registry, path, opaque, query,
-                            fragment, self)
-      else
-        Generic.new(scheme, userinfo, host, port,
-                    registry, path, opaque, query,
-                    fragment, self)
-      end
+      URI.for(*self.split(uri), self)
     end