func (p policy) matches(a authorizer.Attributes) bool {
	if p.subjectMatches(a) {
		if p.Readonly == false || (p.Readonly == a.IsReadOnly()) {
			switch {
			case p.NonResourcePath != "":
				if p.NonResourcePath == a.GetNonResourcePath() {
					return true
				}
			// When the path is a non-resource path it cannot match.
			case len(a.GetNonResourcePath()) == 0 && (p.Resource == "" || (p.Resource == a.GetResource())):
				if p.Namespace == "" || (p.Namespace == a.GetNamespace()) {
					return true
				}
			}
		}
	}

	return false
}