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Mercurial > core / lisp/lib/dat/parquet/gen.lisp

changeset 637: b88bf15f60d0
parent: 849f72b72b41
child: 642b3b82b20d
author: Richard Westhaver <ellis@rwest.io>
date: Wed, 04 Sep 2024 22:02:21 -0400
permissions: -rw-r--r--
description: parquet tweaks, import ox-man 
     1 ;;; gen.lisp --- Parquet Lisp Code Generator
     2 
     3 ;; 
     4 
     5 ;;; Code:
     6 (defpackage :dat/parquet/gen ;; not public API
     7   (:use :cl :std :dat/proto :dat/json)
     8   (:export :load-parquet))
     9 
    10 (in-package :dat/parquet/gen)
    11 
    12 (defparameter *parquet-json-file*
    13   (or (probe-file #.(asdf:system-relative-pathname :prelude #P"../.stash/parquet.json"))
    14       (warn "*PARQUET-JSON-FILE* not found")))
    15 
    16 (defparameter *parquet-output-file*
    17   #.(asdf:system-relative-pathname :dat #P"parquet/thrift.lisp"))
    18 
    19 (defvar *parquet-json* nil)
    20 
    21 (defun %parquet-json-enums ()
    22   (json-getf *parquet-json* "enums"))
    23 
    24 (defun dat/parquet::parquet-json-enum-getf (name)
    25   (json-getf
    26    (find-if (lambda (x) (equal name (json-getf x "name"))) (%parquet-json-enums))
    27    "members"))
    28 
    29 (defun dat/parquet::snakecase-name-to-lisp-name (string)
    30   (string-upcase
    31    (substitute #\- #\_ string)))
    32 
    33 (defun dat/parquet::camelcase-name-to-lisp-name (string)
    34   (string-upcase
    35    (with-output-to-string (name)
    36      (loop for i from 0 below (length string)
    37            for c across string
    38            when (and (upper-case-p c) (not (zerop i)))
    39            do (write-char #\- name)
    40            do (write-char c name)))))
    41 
    42 (defvar *parquet-enums* nil)
    43 
    44 (defmacro define-parquet-enum (sym name)
    45   `(progn
    46      (defun ,(symbolicate "PARQUET-JSON-" sym) ()
    47        (mapcar (lambda (x) (keywordicate (snakecase-name-to-lisp-name (json-getf x "name"))))
    48                (parquet-json-enum-getf ,name)))
    49      (defparameter ,(symbolicate
    50                      (concatenate 'string "*PARQUET-" (symbol-name sym) "*"))
    51        (,(symbolicate "PARQUET-JSON-" sym)))))
    52 
    53 (labels ((parse-type-id (type-id)
    54            (when type-id
    55              (string-case (type-id :default nil)
    56                ("bool" 'boolean)
    57                ("byte" 'signed-byte)
    58                ("i16" '(signed-byte 16))
    59                ("i32" '(signed-byte 32))
    60                ("i64" '(signed-byte 64))
    61                ("double" 'double-float)
    62                ("string" 'string)
    63                ("list" 'vector)
    64                ("binary" 'octet-vector)
    65                ("set" 'vector)
    66                ("enum" '(signed-byte 32))
    67                ("union" 'union)
    68                ("struct" 'struct))))
    69          (%intern (name)
    70            (if (stringp name)
    71                (symbolicate
    72                 (cond 
    73                   ((equal name "UUIDType") "PARQUET-UUID-TYPE")
    74                   (t (concatenate 'string
    75                                   "PARQUET-"
    76                                   (camelcase-name-to-lisp-name name)))))
    77                name))
    78          (parse-type (o)
    79            (when o
    80              (string-case ((json-getf o "typeId"))
    81                ("union" (%intern (json-getf o "class")))
    82                ("list"
    83                 (if-let ((elt (json-getf o "elemType" nil)))
    84                   (%intern (parse-type elt))
    85                   (parse-type-id (json-getf o "elemTypeId"))))
    86                ("set"
    87                 (if-let ((elt (json-getf o "elemType" nil)))
    88                   (%intern (parse-type elt))
    89                   (parse-type-id (json-getf o "elemTypeId"))))
    90                ("struct" (%intern (json-getf o "class")))
    91                ("enum" (%intern (json-getf o "class")))))))
    92   (defun convert-parquet-struct-field-type (field) ;; technically part of thrift type system
    93     (let* ((type-id (parse-type-id (parquet-struct-field-type-id field)))
    94            (type (parse-type (parquet-struct-field-type field)))
    95            (required (parquet-struct-field-required field)))
    96           (let ((ret (cond
    97                        ((eql 'vector type-id) `(vector ,type))
    98                        (t (or type type-id)))))
    99             (if (equal "optional" required)
   100                 `(or null ,ret)
   101                 ret)))))
   102 
   103 (defparameter *parquet-structs* nil)
   104 
   105 (defstruct (parquet-struct
   106             (:constructor make-parquet-struct (name doc exceptionp unionp fields)))
   107   name doc exceptionp unionp (fields nil :type list))
   108 
   109 (defstruct (parquet-struct-field
   110             (:constructor make-parquet-struct-field (key name type-id type doc required)))
   111   key name type-id type doc required)
   112 
   113 (defun parquet-json-structs () ;; name doc isException isUnion fields
   114   (mapcar
   115    (lambda (s)
   116      (let ((name (json-getf s "name"))
   117            (doc (json-getf s "doc"))
   118            (exceptionp (json-getf s "isException"))
   119            (unionp (json-getf s "isUnion"))
   120            (fields (loop for f in (json-getf s "fields")
   121                          collect
   122                             (let ((key (json-getf f "key"))
   123                                   (name (json-getf f "name"))
   124                                   (type-id (json-getf f "typeId"))
   125                                   ;; json object - needs additional parsing
   126                                   (type (json-getf f "type"))
   127                                   (doc (json-getf f "doc"))
   128                                   (required (json-getf f "required")))
   129                               (make-parquet-struct-field key name type-id type doc required)))))
   130        (make-parquet-struct name doc exceptionp unionp fields)))
   131    (json-getf *parquet-json* "structs")))
   132 
   133 (defun parquet-json-namespaces ()
   134   (json-getf *parquet-json* "namespaces"))
   135 
   136 (eval-always
   137   (defun init-parquet-json (&optional (file *parquet-json-file*))
   138     (with-open-file (file file)
   139       (setq *parquet-json* (json-read file)))
   140     (setq *parquet-enums* (%parquet-json-enums))
   141     (setq *parquet-structs* (parquet-json-structs))))
   142 
   143 ;;; CLOS
   144 
   145 ;; (defmethod print-object ((obj parquet-object) stream)
   146 ;;   "Output a Parquet object to a stream."
   147 ;;   (print-unreadable-object (obj stream :type t)))
   148 
   149 (defmacro define-parquet-class (name superclasses slots &rest options)
   150   "Define a new subclass of PARQUET-OBJECT with NAME."
   151   `(defclass ,name ,@(if-let ((s superclasses)) (list s) `((dat/parquet::parquet-object))) ,slots ,@options))
   152 
   153 ;;; Codegen
   154 
   155 ;; 8)
   156 (eval-always
   157   (defun %define-parquet-structs ()
   158     "Define all known values in *PARQUET-STRUCTS* using DEFINE-PARQUET-CLASS (DEFCLASS)."
   159     (loop for struct in *parquet-structs*
   160           unless (null struct)
   161           collect (let* ((name (parquet-struct-name struct))
   162                          (doc (parquet-struct-doc struct))
   163                          (fields (parquet-struct-fields struct))
   164                          (class-name (symbolicate (cond
   165                                                ((equal name "UUIDType") "PARQUET-UUID-TYPE")
   166                                                (t (concatenate 'string
   167                                                                "PARQUET-"
   168                                                                (camelcase-name-to-lisp-name name)))))))
   169                     `(progn
   170                        (defclass ,class-name (dat/parquet::parquet-object)
   171                                  (,@(mapcar (lambda (f)
   172                                               (let ((fdoc (parquet-struct-field-doc f))
   173                                                     (fname (snakecase-name-to-lisp-name
   174                                                             (parquet-struct-field-name f))))
   175                                                 `(,(symbolicate fname)
   176                                                   ,@(when fdoc `(:documentation ,fdoc))
   177                                                   :initarg ,(keywordicate fname)
   178                                                   ;; TODO 2024-07-12: 
   179                                                   ,@(when (equal "optional" (parquet-struct-field-required f))
   180                                                       `(:initform nil))
   181                                                   ,@(when-let ((ty (convert-parquet-struct-field-type f)))
   182                                                       `(:type ,ty)))))
   183                                             fields))
   184                                  ,@(when doc `((:documentation ,doc)))))))))
   185 
   186 (defmacro define-parquet-type (name opts &body body)
   187   "Define a parquet type with DEFTYPE which maps to LISP-TYPE."
   188   `(deftype ,(symbolicate "PARQUET-" (substitute #\- #\_ name)) ,opts ,@body))
   189 
   190 (defun parse-parquet-thrift-definitions (&key (input *parquet-json-file*)
   191                                            (output #.(asdf:system-relative-pathname :dat "parquet/thrift.lisp")))
   192   (init-parquet-json input)
   193   (with-open-file (defs output :direction :output :if-exists :supersede :if-does-not-exist :create)
   194     (format defs ";;; ~a --- Parquet Thrift Definitions -*- buffer-read-only:t -*-
   195 
   196 ;; input = ~a
   197 
   198 ;; This file was generated automatically by
   199 ;; DAT/PARQUET/GEN:PARSE-PARQUET-THRIFT-DEFINITIONS
   200 
   201 ;; Do not modify.
   202 
   203 ;;; Code:
   204 (in-package :dat/parquet)" output input)
   205     (format defs "~2%")
   206     (let ((enums   '((define-parquet-enum types "Type")
   207                      (define-parquet-enum converted-types "ConvertedType")
   208                      (define-parquet-enum field-repetition-types "FieldRepetitionType")
   209                      (define-parquet-enum encodings "Encoding")
   210                      (define-parquet-enum compression-codecs "CompressionCodec")
   211                      (define-parquet-enum page-types "PageType")
   212                      (define-parquet-enum boundary-orders "BoundaryOrder")))
   213           (types '((define-parquet-type "BOOLEAN" () 'boolean)
   214                    (define-parquet-type "INT32" () '(signed-byte 32))
   215                    (define-parquet-type "INT64" () '(signed-byte 64))
   216                    (define-parquet-type "INT96" () '(signed-byte 96))
   217                    (define-parquet-type "FLOAT" () 'float)
   218                    (define-parquet-type "DOUBLE" () 'double-float)
   219                    (define-parquet-type "BYTE_ARRAY" (&optional size) `(octet-vector ,size))
   220                    (define-parquet-type "FIXED_LEN_BYTE_ARRAY" (size) `(octet-vector ,size))))
   221           (structs (mapcar #'macroexpand-1 (%define-parquet-structs))))
   222       ;; expands to a progn, so we just take the cdr
   223       (dolist (en enums)
   224         (dolist (f (cdr (macroexpand en)))
   225           (write f :stream defs :case :downcase :readably t)
   226           (terpri defs)))
   227       (dolist (ty types)
   228         (dolist (f (cdr (macroexpand ty)))
   229           (write f :stream defs :case :downcase :readably t)
   230           (terpri defs)))
   231       (dolist (st structs)
   232         (dolist (f (cdr (macroexpand st)))
   233           (write f :stream defs :case :downcase :readably t)
   234           (terpri defs))))))