remove multiple individually defined Namespaces and use enumerations instead

example/example.dart

@@ -24,7 +24,7 @@ void main() {
   // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
 
   // Generate a v5 (namespace-name-sha1-based) id
-  var v5 = uuid.v5(Uuid.NAMESPACE_URL, 'www.google.com');
+  var v5 = uuid.v5(Namespace.URL.value, 'www.google.com');
   // -> 'c74a196f-f19d-5ea9-bffd-a2742432fc9c'
 
   // Generate a v6 (time-based) id

lib/enums.dart

@@ -1,13 +1,20 @@
 // ignore_for_file: constant_identifier_names
 
-class Namespace {
-  // RFC4122 provided namespaces for v3 and v5 namespace based UUIDs
-  static const DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
-  static const URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
-  static const OID = '6ba7b812-9dad-11d1-80b4-00c04fd430c8';
-  static const X500 = '6ba7b814-9dad-11d1-80b4-00c04fd430c8';
-  static const NIL = '00000000-0000-0000-0000-000000000000';
-}
+import 'package:uuid/uuid_value.dart';
 
 /// The options for UUID Validation strictness
 enum ValidationMode { nonStrict, strictRFC4122 }
+
+enum Namespace {
+  // RFC4122 provided namespaces for v3 and v5 namespace based UUIDs
+  DNS("6ba7b810-9dad-11d1-80b4-00c04fd430c8"),
+  URL("6ba7b811-9dad-11d1-80b4-00c04fd430c8"),
+  OID("6ba7b812-9dad-11d1-80b4-00c04fd430c8"),
+  X500("6ba7b814-9dad-11d1-80b4-00c04fd430c8"),
+  NIL("00000000-0000-0000-0000-000000000000");
+
+  const Namespace(this.value);
+  final String value;
+
+  UuidValue get uuidValue => UuidValue.raw(value);
+}

lib/uuid.dart

@@ -30,13 +30,6 @@ export 'enums.dart';
 /// Released under MIT License.
 
 class Uuid {
-  // RFC4122 provided namespaces for v3 and v5 namespace based UUIDs
-  static const NAMESPACE_DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_OID = '6ba7b812-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_X500 = '6ba7b814-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_NIL = '00000000-0000-0000-0000-000000000000';
-
   final GlobalOptions? goptions;
 
   /// Creates a new instance of the Uuid class.

lib/uuid_value.dart

@@ -37,12 +37,6 @@ class UuidValue {
     return uuidValue;
   }
 
-  static const dns = UuidValue.raw(Uuid.NAMESPACE_DNS);
-  static const url = UuidValue.raw(Uuid.NAMESPACE_URL);
-  static const oid = UuidValue.raw(Uuid.NAMESPACE_OID);
-  static const x500 = UuidValue.raw(Uuid.NAMESPACE_X500);
-  static const nil = UuidValue.raw(Uuid.NAMESPACE_NIL);
-
   /// Creates a UuidValue by taking directly the internal string representation of the [uuid],
   /// which is expected to be lowercase.
   ///

lib/v5.dart

@@ -10,13 +10,6 @@ import 'v4.dart';
 import 'package:crypto/crypto.dart' as crypto;
 
 class UuidV5 {
-  // RFC4122 provided namespaces for v3 and v5 namespace based UUIDs
-  static const NAMESPACE_DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_OID = '6ba7b812-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_X500 = '6ba7b814-9dad-11d1-80b4-00c04fd430c8';
-  static const NAMESPACE_NIL = '00000000-0000-0000-0000-000000000000';
-
   final GlobalOptions? goptions;
 
   const UuidV5({this.goptions});
@@ -37,7 +30,7 @@ class UuidV5 {
     // If useRandom is true, generate UUIDv4, else use NIL
     var blankNS = useRandom
         ? UuidV4(goptions: goptions).generate(options: options?.v4options)
-        : Namespace.NIL;
+        : Namespace.NIL.value;
 
     // Use provided namespace, or use whatever is decided by options.
     namespace = (namespace != null) ? namespace : blankNS;

lib/validation.dart

@@ -16,7 +16,7 @@ class UuidValidation {
       fromString = UuidParsing.unparse(fromByteList);
     }
     // UUID of all 0s is ok.
-    if (fromString == Namespace.NIL) {
+    if (fromString == Namespace.NIL.value) {
       return true;
     }
 

test/uuid_test.dart

@@ -216,8 +216,8 @@ void main() {
 
   group('[Version 5 Tests]', () {
     test('Using URL namespace and custom name', () {
-      var u0 = uuid.v5(Uuid.NAMESPACE_URL, 'www.google.com');
-      var u1 = uuid.v5(Uuid.NAMESPACE_URL, 'www.google.com');
+      var u0 = uuid.v5(Namespace.URL.value, 'www.google.com');
+      var u1 = uuid.v5(Namespace.URL.value, 'www.google.com');
 
       expect(u0, equals(u1));
     });
@@ -439,11 +439,11 @@ void main() {
         'offset 16 bytes before the end': size - 16,
       }.entries) {
         test(testCase.key, () {
-          final v = Uuid.parse(Uuid.NAMESPACE_OID,
+          final v = Uuid.parse(Namespace.OID.value,
               buffer: buffer, offset: testCase.value);
 
           expect(Uuid.unparse(v, offset: testCase.value),
-              equals(Uuid.NAMESPACE_OID));
+              equals(Namespace.OID.value));
         });
       }
     });
@@ -457,7 +457,7 @@ void main() {
       }.entries) {
         test(testCase.key, () {
           expect(
-              () => Uuid.parse(Uuid.NAMESPACE_OID,
+              () => Uuid.parse(Namespace.OID.value,
                   buffer: buffer, offset: testCase.value),
               throwsA(isA<RangeError>()));
         });