/
data.clj
271 lines (235 loc) · 9.09 KB
/
data.clj
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(ns tech.libs.smile.data
(:require [tech.v2.datatype :as dtype]
[tech.v2.datatype.protocols :as dtype-proto]
[tech.v2.datatype.typecast :as typecast]
[tech.v2.datatype.datetime :as dtype-dt]
[tech.v2.datatype.casting :as casting]
[tech.ml.dataset.impl.dataset :as ds-impl]
[tech.ml.dataset.column :as ds-col]
[tech.ml.dataset.string-table :as str-table]
[clojure.set :as set])
(:import [tech.ml.dataset.impl.dataset Dataset]
[smile.data DataFrame DataFrameImpl DataFrameFactory]
[java.time.format DateTimeFormatter]
[java.time LocalDate LocalTime LocalDateTime]
[smile.math.matrix Matrix]
[smile.data.type StructType StructField DataType DataType$ID DataTypes]
[smile.data.vector BaseVector Vector BooleanVector ByteVector ShortVector
IntVector LongVector FloatVector DoubleVector StringVector
BooleanVectorImpl ByteVectorImpl ShortVectorImpl
IntVectorImpl LongVectorImpl FloatVectorImpl DoubleVectorImpl
StringVectorImpl VectorImpl
VectorFactory]
[smile.data.measure NominalScale DiscreteMeasure]
[org.roaringbitmap RoaringBitmap]
[java.util Collection List ArrayList]
[java.io Writer]))
(set! *warn-on-reflection* true)
(def datatype->smile-map
{:boolean DataTypes/BooleanType
:int8 DataTypes/ByteType
:character DataTypes/CharType
:int16 DataTypes/ShortType
:int32 DataTypes/IntegerType
:int64 DataTypes/LongType
:float32 DataTypes/FloatType
:float64 DataTypes/DoubleType
:decimal DataTypes/DecimalType
:string DataTypes/StringType
:local-date DataTypes/DateType
:local-time DataTypes/TimeType
:local-date-time DataTypes/DateTimeType
:packed-local-date DataTypes/DateType
:packed-local-time DataTypes/TimeType
:packed-local-date-time DataTypes/DateTimeType
:object DataTypes/ObjectType})
(def smile->datatype-map
(-> (set/map-invert datatype->smile-map)
(assoc DataTypes/DateType :local-date
DataTypes/TimeType :local-time
DataTypes/DateTimeType :local-date-time)))
(defn datatype->smile
^DataType [dtype]
(when dtype
(get datatype->smile-map dtype DataTypes/ObjectType)))
(defn colname->str
^String [cname]
(cond
(string? cname) cname
(keyword? cname) (name cname)
(symbol? cname) (name cname)
:else
(str cname)))
(defn smile-struct-field
^StructField [name dtype]
(StructField. (colname->str name)
(datatype->smile dtype)))
(defn column->field
^StructField [col]
(smile-struct-field (ds-col/column-name col)
(dtype/get-datatype col)))
(defn datatype->smile-vec-type
"Datatype has to be a compile time constant"
[datatype]
(case (casting/safe-flatten datatype)
:boolean 'BooleanVector
:int8 'ByteVector
:int16 'ShortVector
:int32 'IntVector
:int64 'LongVector
:float32 'FloatVector
:float64 'DoubleVector
:string 'StringVector
:object 'Vector))
(defn datatype->smile-vec-impl-type
"Datatype has to be a compile time constant"
[datatype]
(case (casting/safe-flatten datatype)
:boolean 'BooleanVectorImpl
:int8 'ByteVectorImpl
:int16 'ShortVectorImpl
:int32 'IntVectorImpl
:int64 'LongVectorImpl
:float32 'FloatVectorImpl
:float64 'DoubleVectorImpl
:string 'StringVectorImpl
'VectorImpl))
(defn column->smile
^BaseVector [col]
(let [col-base-dtype (dtype/get-datatype col)
col-data (if (dtype-dt/packed-datatype? col-base-dtype)
(dtype-dt/unpack col)
col)
col-dtype (dtype/get-datatype col-data)
col-ary (if-let [col-ary (dtype/->array col-data)]
col-ary
(dtype/make-container :java-array col-dtype col-data))
field (column->field col)]
(case (casting/safe-flatten col-dtype)
:boolean (VectorFactory/booleanVector field ^booleans col-ary)
:int8 (VectorFactory/byteVector field ^bytes col-ary)
:int16 (VectorFactory/shortVector field ^shorts col-ary)
:int32 (VectorFactory/intVector field ^ints col-ary)
:int64 (VectorFactory/longVector field ^longs col-ary)
:float32 (VectorFactory/floatVector field ^floats col-ary)
:float64 (VectorFactory/doubleVector field ^doubles col-ary)
:string (VectorFactory/stringVector field ^"[Ljava.lang.String;" col-ary)
(VectorFactory/genericVector field col-ary))))
(defn dataset->dataframe
"Convert a dataset to a smile.data DataFrame"
^DataFrame [ds]
(if (instance? DataFrame ds)
ds
(DataFrameFactory/construct ^"[Lsmile.data.vector.BaseVector;"
(into-array BaseVector (map column->smile ds)))))
(defmacro construct-primitive-smile-vec
[datatype name data]
(case datatype
:boolean `(BooleanVectorImpl. ~name (typecast/as-boolean-array ~data))
:int8 `(ByteVectorImpl. ~name (typecast/as-byte-array ~data))
:int16 `(ShortVectorImpl. ~name (typecast/as-short-array ~data))
:int32 `(IntVectorImpl. ~name (typecast/as-int-array ~data))
:int64 `(LongVectorImpl. ~name (typecast/as-long-array ~data))
:float32 `(FloatVectorImpl. ~name (typecast/as-float-array ~data))
:float64 `(DoubleVectorImpl. ~name (typecast/as-double-array ~data))))
(extend-type BaseVector
dtype-proto/PDatatype
(get-datatype [v]
(if-let [retval (get smile->datatype-map (.type v))]
retval
:object))
dtype-proto/PCountable
(ecount [v] (long (.size v))))
(defmacro extend-primitive-vec
[datatype]
`(extend-type ~(datatype->smile-vec-impl-type datatype)
dtype-proto/PDatatype
(get-datatype [v#] ~datatype)
dtype-proto/PToArray
(->sub-array [v#]
{:java-array (.array v#)
:offset 0
:length (dtype/ecount (.array v#))})
(->array-copy [v#]
(dtype/clone (.array v#)))
dtype-proto/PToNioBuffer
(convertible-to-nio-buffer? [v#] true)
(->buffer-backing-store [v#]
(dtype-proto/->buffer-backing-store (.array v#)))
dtype-proto/PBuffer
(sub-buffer [v# offset# length#]
(dtype-proto/sub-buffer (.array v#) offset# length#))
dtype-proto/PClone
(clone [v#]
(construct-primitive-smile-vec
~datatype (StructField. (.name v#) (.type v#) (.measure v#))
(dtype/clone (.array v#))))
dtype-proto/PToReader
(convertible-to-reader? [v#] true)
(->reader [v# options#] (dtype-proto/->reader (.array v#) options#))
dtype-proto/PToWriter
(convertible-to-writer? [v#] true)
(->writer [v# options#] (dtype-proto/->writer (.array v#) options#))))
(extend-primitive-vec :boolean)
(extend-primitive-vec :int8)
(extend-primitive-vec :int16)
(extend-primitive-vec :int32)
(extend-primitive-vec :int64)
(extend-primitive-vec :float32)
(extend-primitive-vec :float64)
(extend-type VectorImpl
dtype-proto/PToArray
(->sub-array [v]
{:java-array (.array v)
:offset 0
:length (dtype/ecount (.array v))})
(->array-copy [v]
(dtype/clone (.array v)))
dtype-proto/PBuffer
(sub-buffer [v offset length]
(dtype-proto/sub-buffer (.array v) offset length))
dtype-proto/PClone
(clone [v]
(let [new-field (StructField. (.name v) (.type v) (.measure v))]
(if (= :string (dtype/get-datatype v))
(StringVectorImpl. new-field ^"[Ljava.lang.String;" (dtype/clone (.array v)))
(VectorImpl. new-field (.array v)))))
dtype-proto/PToReader
(convertible-to-reader? [v] true)
(->reader [v options] (dtype-proto/->reader (.array v) options))
dtype-proto/PToWriter
(convertible-to-writer? [v#] true)
(->writer [v options] (dtype-proto/->writer (.array v) options)))
(defn dataframe->dataset
([df {:keys [unify-strings?]
:or {unify-strings? true}
:as options}]
(->> df
(map (fn [^BaseVector smile-vec]
{:name (.name smile-vec)
:data
(if (and unify-strings?
(= :string (dtype/get-datatype smile-vec)))
(let [str-t (str-table/make-string-table (dtype/ecount smile-vec))
col-rdr (dtype/->reader smile-vec)
str-rdr (dtype/object-reader
(dtype/ecount col-rdr)
#(let [read-val (col-rdr %)]
(cond
(string? read-val)
read-val
(nil? read-val)
""
:else
(throw (Exception.
(format "Value not a string: %s"
read-val))))))]
(dtype/copy! str-rdr str-t)
str-t)
smile-vec)}))
(ds-impl/new-dataset options {:name "_unnamed"})))
([df]
(dataframe->dataset df {})))
(defmethod print-method DataFrameImpl
[dataset w]
(.write ^Writer w (.toString ^Object dataset)))