findFirstAnnotation method

ConstantReader? findFirstAnnotation(
  1. Element element,
  2. Type type
)

查找元素上的第一个指定类型的注解，返回 ConstantReader

Implementation

ConstantReader? findFirstAnnotation(Element element, Type type) {
  final interceptChecker = TypeChecker.typeNamed(type);
  for (final annotation in element.metadata.annotations) {
    final constantValue = annotation.computeConstantValue();
    if (constantValue == null) continue;
    final annotationType = constantValue.type;
    if (annotationType != null &&
        interceptChecker.isAssignableFromType(annotationType)) {
      return ConstantReader(constantValue);
    }
  }
  return null;
}