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;; 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)))))))
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