forked from zero-one-group/geni
/
interop.clj
184 lines (145 loc) · 4.92 KB
/
interop.clj
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(ns zero-one.geni.interop
(:require
[camel-snake-kebab.core :refer [->kebab-case]]
[clojure.java.data :as j]
[clojure.string :refer [replace-first]]
[zero-one.geni.utils :refer [ensure-coll]])
(:import
(java.io ByteArrayOutputStream)
(org.apache.spark.ml.linalg DenseVector
DenseMatrix
SparseVector
Vectors)
(org.apache.spark.sql Row)
(scala Console
Function0
Function1
Function2
Function3)
(scala.collection JavaConversions Map Seq)))
(declare ->clojure)
(defn ->java-list [coll]
(java.util.ArrayList. coll))
(defn scala-seq? [value]
(instance? Seq value))
(defn scala-map? [value]
(instance? Map value))
(defn scala-seq->vec [scala-seq]
(vec (JavaConversions/seqAsJavaList scala-seq)))
(defn scala-map->map [^Map m]
(into {}
(for [[k v] (JavaConversions/mapAsJavaMap m)]
[k (->clojure v)])))
(defn ->scala-seq [coll]
(JavaConversions/asScalaBuffer (seq coll)))
(defn scala-tuple->vec [p]
(->> (.productArity p)
(range)
(map #(.productElement p %))
(into [])))
(defn ->scala-function0 [f]
(reify Function0 (apply [_] (f))))
(defn ->scala-function1 [f]
(reify Function1 (apply [_ x] (f x))))
(defn ->scala-function2 [f]
(reify Function2 (apply [_ x y] (f x y))))
(defn ->scala-function3 [f]
(reify Function3 (apply [_ x y z] (f x y z))))
(defmacro with-scala-out-str [& body]
`(let [out-buffer# (ByteArrayOutputStream.)]
(Console/withOut
out-buffer#
(->scala-function0 (fn [] ~@body)))
(.toString out-buffer# "UTF-8")))
(defn ->dense-vector [values]
(let [[x & xs] values]
(Vectors/dense x (->scala-seq xs))))
(defn ->sparse-vector [size indices values]
(SparseVector. size (int-array indices) (double-array values)))
(defn array? [value] (.isArray (class value)))
(defn spark-row? [value]
(instance? Row value))
(defn dense-vector? [value]
(instance? DenseVector value))
(defn sparse-vector? [value]
(instance? SparseVector value))
(defn dense-matrix? [value]
(instance? DenseMatrix value))
(defn vector->seq [spark-vector]
(-> spark-vector .values seq))
(defn matrix->seqs [matrix]
(->> matrix .rowIter .toSeq scala-seq->vec (map vector->seq)))
(defn spark-row->map [row]
(let [cols (->> row .schema .fieldNames (map keyword))
values (->> row .toSeq scala-seq->vec (map ->clojure))]
(zipmap cols values)))
(defn ->spark-row [x]
(Row/fromSeq (->scala-seq x)))
(defn ->clojure [value]
(cond
(nil? value) nil
(coll? value) (map ->clojure value)
(array? value) (map ->clojure (seq value))
(scala-seq? value) (map ->clojure (scala-seq->vec value))
(scala-map? value) (scala-map->map value)
(spark-row? value) (spark-row->map value)
(dense-vector? value) (vector->seq value)
(sparse-vector? value) (vector->seq value)
(dense-matrix? value) (matrix->seqs value)
:else value))
(defn setter? [^java.lang.reflect.Method method]
(and (= 1 (alength ^"[Ljava.lang.Class;" (.getParameterTypes method)))
(re-find #"^set[A-Z]" (.getName method))))
(defn method-keyword [^java.lang.reflect.Method method]
(-> method
.getName
(replace-first #"set" "")
->kebab-case
keyword))
(defn setters-map [^Class cls]
(->> cls
.getMethods
(filter setter?)
(map #(vector (method-keyword %) %))
(into {})))
(defn setter-type [^java.lang.reflect.Method method]
(get (.getParameterTypes method) 0))
(defn ->java [^Class cls value]
(if (= cls scala.collection.Seq)
(->scala-seq value)
(j/to-java cls value)))
(defn set-value [^java.lang.reflect.Method method instance value]
(.invoke method instance (into-array [(->java (setter-type method) value)])))
(defn convert-keywords [value]
(cond
(keyword? value) (name value)
(and (coll? value)
(every? keyword? value)) (map name value)
:else value))
(defn instantiate
([^Class cls props]
(let [setters (setters-map cls)
instance (.newInstance cls)]
(reduce
(fn [_ [k v]]
(when-let [setter (setters k)]
(set-value setter instance (convert-keywords v))))
instance
props))))
(defn zero-arity? [^java.lang.reflect.Method method]
(= 0 (alength ^"[Ljava.lang.Class;" (.getParameterTypes method))))
(defn fields-map [^Class cls]
(->> cls
.getMethods
(filter zero-arity?)
(map #(vector (method-keyword %) %))
(into {})))
(defn get-field [instance field-keyword]
(let [fields (fields-map (class instance))]
(.invoke (fields field-keyword) instance (into-array []))))
(defn dense [& values]
(let [flattened (mapcat ensure-coll values)]
(->dense-vector flattened)))
(def sparse ->sparse-vector)
(defn row [& values]
(->spark-row values))