initial version

.gitignore

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+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+build/
+ios/.generated/
+ios/Flutter/Generated.xcconfig
+ios/Runner/GeneratedPluginRegistrant.*

.vscode/launch.json

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+{
+    // Verwendet IntelliSense zum Ermitteln möglicher Attribute.
+    // Zeigen Sie auf vorhandene Attribute, um die zugehörigen Beschreibungen anzuzeigen.
+    // Weitere Informationen finden Sie unter https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Flutter",
+            "request": "launch",
+            "type": "dart"
+        }
+    ]
+}

CHANGELOG.md

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+## [0.0.1] - TODO: Add release date.
+
+* TODO: Describe initial release.

LICENSE

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+TODO: Add your license here.

README.md

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+# get_it
+
+A new flutter package project.
+
+## Getting Started
+
+For help getting started with Flutter, view our online [documentation](https://flutter.io/).
+
+For help on editing package code, view the [documentation](https://flutter.io/developing-packages/).

get_it.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
+      <excludeFolder url="file://$MODULE_DIR$/.idea" />
+      <excludeFolder url="file://$MODULE_DIR$/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+    </content>
+    <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Flutter Plugins" level="project" />
+  </component>
+</module>

lib/get_it.dart

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+library get_it;
+
+typedef FactoryFunc = Object Function();
+
+/// A Calculator.
+class GetIt {
+  static Map<Type, _ServiceFactory> _factories = new Map<Type, _ServiceFactory>();
+
+  static T get<T>() {
+    var object = _factories[T];
+    if (object == null) {
+      throw new Exception("Object of type ${T.toString()} is not registered inside GetIt");
+    }
+    return object.getObject() as T;
+  }
+
+  static void register<T>(FactoryFunc func) {
+    var factory = new _ServiceFactory();
+    factory.create = func;
+    factory.type = ServiceFactoryType.alwaysNew;
+    _factories[T] = factory;
+  }
+
+  static void registerLazySingleton<T>(FactoryFunc func) {
+    var factory = new _ServiceFactory();
+    factory.create = func;
+    factory.type = ServiceFactoryType.lazy;
+    _factories[T] = factory;
+  }
+
+  static void registerConstant<T>(T instance) {
+    var factory = new _ServiceFactory();
+    factory.instance = instance;
+    factory.type = ServiceFactoryType.constant;
+    _factories[T] = factory;
+  }
+}
+
+enum ServiceFactoryType { alwaysNew, constant, lazy }
+
+class _ServiceFactory {
+  ServiceFactoryType type;
+
+  FactoryFunc create;
+  Object instance;
+
+  T getObject<T>() {
+    try {
+      switch (type) {
+        case ServiceFactoryType.alwaysNew:
+          return create() as T;
+          break;
+        case ServiceFactoryType.constant:
+          return instance as T;
+          break;
+        case ServiceFactoryType.lazy:
+          if (instance == null) {
+            instance = create();
+          }
+          return instance as T;
+          break;
+      }
+    } catch (e, s) {
+      print("Error while creating ${T.toString()}");
+      print('Stack trace:\n $s');
+      rethrow;
+    }
+  }
+}