fix: the id type does not support numbers, when using parallel.

example/.metadata

@@ -4,7 +4,7 @@
 # This file should be version controlled and should not be manually edited.
 
 version:
-  revision: "2f708eb8396e362e280fac22cf171c2cb467343c"
+  revision: "adc901062556672b4138e18a4dc62a4be8f4b3c2"
   channel: "stable"
 
 project_type: app
@@ -13,26 +13,26 @@ project_type: app
 migration:
   platforms:
     - platform: root
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: android
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: ios
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: linux
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: macos
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: web
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
     - platform: windows
-      create_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
-      base_revision: 2f708eb8396e362e280fac22cf171c2cb467343c
+      create_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
+      base_revision: adc901062556672b4138e18a4dc62a4be8f4b3c2
 
   # User provided section
 

example/pubspec.lock

@@ -87,6 +87,22 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  intl:
+    dependency: transitive
+    description:
+      name: intl
+      sha256: "3df61194eb431efc39c4ceba583b95633a403f46c9fd341e550ce0bfa50e9aa5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.20.2"
+  isolate_manager:
+    dependency: transitive
+    description:
+      name: isolate_manager
+      sha256: "375e35325c964be41336faeaf86641d742a944f10b28d301237b795f1085cbb7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.2"
   leak_tracker:
     dependency: transitive
     description:

lib/core/algorithm/decorator/barnes_hut_coulomb_decorator.dart

@@ -1,8 +1,6 @@
 import 'dart:math';
 import 'dart:ui';
 import 'package:flutter/foundation.dart';
-import 'package:flutter_graph_view/core/algorithm/decorator/parallelizable_decorator.dart';
-import 'package:flutter_graph_view/core/algorithm/decorator/parallelization_decorator.dart';
 import 'package:flutter_graph_view/flutter_graph_view.dart';
 import 'package:intl/intl.dart';
 import 'package:isolate_manager/isolate_manager.dart';

lib/core/algorithm/decorator/parallelization_decorator.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter_graph_view/core/algorithm/decorator/parallelizable_decorator.dart';
 import 'package:flutter_graph_view/flutter_graph_view.dart';
 import 'package:intl/intl.dart';
 import 'package:isolate_manager/isolate_manager.dart';
@@ -147,8 +146,11 @@ class ParallelizationDecorator extends ForceDecorator {
 
             // apply forces
             var vMap = graph.vertexByIdMap;
+            var k = vMap.entries.firstOrNull?.key;
+            var keyParser = k is num ? num.parse : (v) => v;
             totalForcePerVertex.forEach((key, force) {
-              setForceMap(vMap[key]!, vMap[key]!, force);
+              var v = vMap[keyParser(key)]!;
+              setForceMap(v, v, force);
             });
 
             // print how much time all parallel runs took

lib/flutter_graph_view.dart

@@ -55,6 +55,8 @@ export 'core/algorithm/decorator/graph_route_decorator.dart';
 export 'core/algorithm/decorator/legend_decorator.dart';
 export 'core/algorithm/decorator/counter_decorator.dart';
 export 'core/algorithm/decorator/barnes_hut_coulomb_decorator.dart';
+export 'core/algorithm/decorator/parallelizable_decorator.dart';
+export 'core/algorithm/decorator/parallelization_decorator.dart';
 
 export 'core/options/shape/vertex/vertex_circle_shape.dart';
 export 'core/options/shape/vertex/vertex_diamond_shape.dart';

lib/model/graph.dart

@@ -136,6 +136,6 @@ class Graph<ID> {
   /// serialize the graph
   Map<String, dynamic> serialize() =>
     {
-      "vertexes": { for (var v in vertexes) v.id as String: v.serialize() },
+      "vertexes": { for (var v in vertexes) '${v.id}': v.serialize() },
     };
 }

lib/model/vertex.dart

@@ -159,12 +159,12 @@ class Vertex<I> {
 
   Map<String, dynamic> serialize() =>
   {
-    "id": id as String,
+    "id": '$id',
     "position": position,
     "radius": radius,
     "tag": tag,
     "tags": tags,
-    "neighbors": neighbors.map((n) => n.id as String).toList(),
+    "neighbors": neighbors.map((n) => '${n.id}').toList(),
     "degree": degree,
     // TODO: how do we safely pass in properties
     // "properties": properties