36 lines
957 B
Dart
36 lines
957 B
Dart
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import 'dart:mirrors';
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void main() {
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final stopwatch = Stopwatch()..start();
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var reflectedClass = reflect(Shape());
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reflectedClass.invoke(#draw, []);
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//reflectedClass.invoke(Symbol('draw'), []);
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print('Reflection executed in ${stopwatch.elapsed.inMilliseconds} ms');
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stopwatch.stop();
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printAnnotationValue(String);
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printAnnotationValue(Shape);
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}
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class Shape {
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void draw() => print("Draw Shape");
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}
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void printAnnotationValue(final Type clazz) {
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final DeclarationMirror clazzDeclaration = reflectClass(clazz);
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final ClassMirror someAnnotationMirror = reflectClass(Shape);
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final annotationInstsanceMirror =
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clazzDeclaration.metadata.where((d) => d.type == someAnnotationMirror);
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if (annotationInstsanceMirror.isEmpty) {
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print('Annotation is not on this class');
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return;
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}
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final someAnnotationInstance =
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(annotationInstsanceMirror.first.reflectee as Shape);
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print("${someAnnotationInstance.draw}");
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}
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