1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
;; java 5 annotation tests
(in-ns 'clojure.test-clojure.annotations)
(import [java.lang.annotation Annotation Retention RetentionPolicy Target ElementType])
(definterface Foo (foo []))
(deftype #^{Deprecated true
Retention RetentionPolicy/RUNTIME}
Bar [#^int a
#^{:tag int
Deprecated true
Retention RetentionPolicy/RUNTIME} b]
Foo (#^{Deprecated true
Retention RetentionPolicy/RUNTIME}
foo [this] 42))
(defn annotation->map
"Converts a Java annotation (which conceals data)
into a map (which makes is usable). Not lazy.
Works recursively. Returns non-annotations unscathed."
[#^java.lang.annotation.Annotation o]
(cond
(instance? Annotation o)
(let [type (.annotationType o)
itfs (-> (into #{type} (supers type)) (disj java.lang.annotation.Annotation))
data-methods (into #{} (mapcat #(.getDeclaredMethods %) itfs))]
(into
{:annotationType (.annotationType o)}
(map
(fn [m] [(keyword (.getName m)) (annotation->map (.invoke m o nil))])
data-methods)))
(or (sequential? o) (.isArray (class o)))
(map annotation->map o)
:else o))
(def expected-annotations
#{{:annotationType java.lang.annotation.Retention, :value RetentionPolicy/RUNTIME}
{:annotationType java.lang.Deprecated}})
(deftest test-annotations-on-type
(is (=
expected-annotations
(into #{} (map annotation->map (.getAnnotations Bar))))))
(deftest test-annotations-on-field
(is (=
expected-annotations
(into #{} (map annotation->map (.getAnnotations (.getField Bar "b")))))))
(deftest test-annotations-on-method
(is (=
expected-annotations
(into #{} (map annotation->map (.getAnnotations (.getMethod Bar "foo" nil)))))))
(gen-class :name foo.Bar
:extends clojure.lang.Box
:constructors {^{Deprecated true} [Object] [Object]}
:init init
:prefix "foo")
(defn foo-init [obj]
[[obj] nil])
(deftest test-annotations-on-constructor
(is (some #(instance? Deprecated %)
(for [ctor (.getConstructors (Class/forName "foo.Bar"))
annotation (.getAnnotations ctor)]
annotation))))
|
