| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| #' @include arrow-package.R |
| #' @title class arrow::DataType |
| #' |
| #' @usage NULL |
| #' @format NULL |
| #' @docType class |
| #' |
| #' @section Methods: |
| #' |
| #' TODO |
| #' |
| #' @rdname DataType |
| #' @name DataType |
| DataType <- R6Class("DataType", |
| inherit = Object, |
| public = list( |
| ToString = function() { |
| DataType__ToString(self) |
| }, |
| Equals = function(other) { |
| assert_is(other, "DataType") |
| DataType__Equals(self, other) |
| }, |
| num_children = function() { |
| DataType__num_children(self) |
| }, |
| children = function() { |
| map(DataType__children_pointer(self), shared_ptr, class = Field) |
| }, |
| |
| ..dispatch = function() { |
| switch(names(Type)[self$id + 1], |
| "NA" = null(), |
| BOOL = boolean(), |
| UINT8 = uint8(), |
| INT8 = int8(), |
| UINT16 = uint16(), |
| INT16 = int16(), |
| UINT32 = uint32(), |
| INT32 = int32(), |
| UINT64 = uint64(), |
| INT64 = int64(), |
| HALF_FLOAT = float16(), |
| FLOAT = float32(), |
| DOUBLE = float64(), |
| STRING = utf8(), |
| BINARY = stop("Type BINARY not implemented yet"), |
| DATE32 = date32(), |
| DATE64 = date64(), |
| TIMESTAMP = shared_ptr(Timestamp, self$pointer()), |
| TIME32 = shared_ptr(Time32, self$pointer()), |
| TIME64 = shared_ptr(Time64, self$pointer()), |
| INTERVAL = stop("Type INTERVAL not implemented yet"), |
| DECIMAL = shared_ptr(Decimal128Type, self$pointer()), |
| LIST = shared_ptr(ListType, self$pointer()), |
| STRUCT = shared_ptr(StructType, self$pointer()), |
| UNION = stop("Type UNION not implemented yet"), |
| DICTIONARY = shared_ptr(DictionaryType, self$pointer()), |
| MAP = stop("Type MAP not implemented yet") |
| ) |
| } |
| ), |
| |
| active = list( |
| id = function() DataType__id(self), |
| name = function() DataType__name(self) |
| ) |
| ) |
| |
| DataType$create <- function(xp) shared_ptr(DataType, xp)$..dispatch() |
| |
| #' infer the arrow Array type from an R vector |
| #' |
| #' @param x an R vector |
| #' |
| #' @return an arrow logical type |
| #' @export |
| type <- function(x) UseMethod("type") |
| |
| #' @export |
| type.default <- function(x) DataType$create(Array__infer_type(x)) |
| |
| #' @export |
| type.Array <- function(x) x$type |
| |
| #' @export |
| type.ChunkedArray <- function(x) x$type |
| |
| #' @export |
| type.Column <- function(x) x$type |
| |
| |
| #----- metadata |
| |
| #' @title class arrow::FixedWidthType |
| #' |
| #' @usage NULL |
| #' @format NULL |
| #' @docType class |
| #' |
| #' @section Methods: |
| #' |
| #' TODO |
| #' |
| #' @rdname FixedWidthType |
| #' @name FixedWidthType |
| FixedWidthType <- R6Class("FixedWidthType", |
| inherit = DataType, |
| active = list( |
| bit_width = function() FixedWidthType__bit_width(self) |
| ) |
| ) |
| |
| Int8 <- R6Class("Int8", inherit = FixedWidthType) |
| Int16 <- R6Class("Int16", inherit = FixedWidthType) |
| Int32 <- R6Class("Int32", inherit = FixedWidthType) |
| Int64 <- R6Class("Int64", inherit = FixedWidthType) |
| UInt8 <- R6Class("UInt8", inherit = FixedWidthType) |
| UInt16 <- R6Class("UInt16", inherit = FixedWidthType) |
| UInt32 <- R6Class("UInt32", inherit = FixedWidthType) |
| UInt64 <- R6Class("UInt64", inherit = FixedWidthType) |
| Float16 <- R6Class("Float16", inherit = FixedWidthType) |
| Float32 <- R6Class("Float32", inherit = FixedWidthType) |
| Float64 <- R6Class("Float64", inherit = FixedWidthType) |
| Boolean <- R6Class("Boolean", inherit = FixedWidthType) |
| Utf8 <- R6Class("Utf8", inherit = DataType) |
| |
| DateType <- R6Class("DateType", |
| inherit = FixedWidthType, |
| public = list( |
| unit = function() DateType__unit(self) |
| ) |
| ) |
| Date32 <- R6Class("Date32", inherit = DateType) |
| Date64 <- R6Class("Date64", inherit = DateType) |
| |
| TimeType <- R6Class("TimeType", |
| inherit = FixedWidthType, |
| public = list( |
| unit = function() TimeType__unit(self) |
| ) |
| ) |
| Time32 <- R6Class("Time32", inherit = TimeType) |
| Time64 <- R6Class("Time64", inherit = TimeType) |
| |
| Null <- R6Class("Null", inherit = DataType) |
| |
| Timestamp <- R6Class("Timestamp", |
| inherit = FixedWidthType, |
| public = list( |
| timezone = function() TimestampType__timezone(self), |
| unit = function() TimestampType__unit(self) |
| ) |
| ) |
| |
| DecimalType <- R6Class("DecimalType", |
| inherit = FixedWidthType, |
| public = list( |
| precision = function() DecimalType__precision(self), |
| scale = function() DecimalType__scale(self) |
| ) |
| ) |
| Decimal128Type <- R6Class("Decimal128Type", inherit = DecimalType) |
| |
| NestedType <- R6Class("NestedType", inherit = DataType) |
| |
| #' Apache Arrow data types |
| #' |
| #' These functions create type objects corresponding to Arrow types. Use them |
| #' when defining a [schema()] or as inputs to other types, like `struct`. Most |
| #' of these functions don't take arguments, but a few do. |
| #' |
| #' A few functions have aliases: |
| #' |
| #' * `utf8()` and `string()` |
| #' * `float16()` and `halffloat()` |
| #' * `float32()` and `float()` |
| #' * `bool()` and `boolean()` |
| #' * Called from `schema()` or `struct()`, `double()` also is supported as a |
| #' way of creating a `float64()` |
| #' |
| #' `date32()` creates a datetime type with a "day" unit, like the R `Date` |
| #' class. `date64()` has a "ms" unit. |
| #' |
| #' @param unit For time/timestamp types, the time unit. `time32()` can take |
| #' either "s" or "ms", while `time64()` can be "us" or "ns". `timestamp()` can |
| #' take any of those four values. |
| #' @param timezone For `timestamp()`, an optional time zone string. |
| #' @param precision For `decimal()`, precision |
| #' @param scale For `decimal()`, scale |
| #' @param type For `list_of()`, a data type to make a list-of-type |
| #' @param ... For `struct()`, a named list of types to define the struct columns |
| #' |
| #' @name data-type |
| #' @return An Arrow type object inheriting from DataType. |
| #' @export |
| #' @seealso [dictionary()] for creating a dictionary (factor-like) type. |
| #' @examples |
| #' \donttest{ |
| #' bool() |
| #' struct(a = int32(), b = double()) |
| #' timestamp("ms", timezone = "CEST") |
| #' time64("ns") |
| #' } |
| int8 <- function() shared_ptr(Int8, Int8__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| int16 <- function() shared_ptr(Int16, Int16__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| int32 <- function() shared_ptr(Int32, Int32__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| int64 <- function() shared_ptr(Int64, Int64__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| uint8 <- function() shared_ptr(UInt8, UInt8__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| uint16 <- function() shared_ptr(UInt16, UInt16__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| uint32 <- function() shared_ptr(UInt32, UInt32__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| uint64 <- function() shared_ptr(UInt64, UInt64__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| float16 <- function() shared_ptr(Float16, Float16__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| halffloat <- float16 |
| |
| #' @rdname data-type |
| #' @export |
| float32 <- function() shared_ptr(Float32, Float32__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| float <- float32 |
| |
| #' @rdname data-type |
| #' @export |
| float64 <- function() shared_ptr(Float64, Float64__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| boolean <- function() shared_ptr(Boolean, Boolean__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| bool <- boolean |
| |
| #' @rdname data-type |
| #' @export |
| utf8 <- function() shared_ptr(Utf8, Utf8__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| string <- utf8 |
| |
| #' @rdname data-type |
| #' @export |
| date32 <- function() shared_ptr(Date32, Date32__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| date64 <- function() shared_ptr(Date64, Date64__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| time32 <- function(unit = c("ms", "s")) { |
| if (is.character(unit)) { |
| unit <- match.arg(unit) |
| } |
| unit <- make_valid_time_unit(unit, valid_time32_units) |
| shared_ptr(Time32, Time32__initialize(unit)) |
| } |
| |
| valid_time32_units <- c( |
| "ms" = TimeUnit$MILLI, |
| "s" = TimeUnit$SECOND |
| ) |
| |
| valid_time64_units <- c( |
| "ns" = TimeUnit$NANO, |
| "us" = TimeUnit$MICRO |
| ) |
| |
| make_valid_time_unit <- function(unit, valid_units) { |
| if (is.character(unit)) { |
| unit <- valid_units[match.arg(unit, choices = names(valid_units))] |
| } |
| if (is.numeric(unit)) { |
| # Allow non-integer input for convenience |
| unit <- as.integer(unit) |
| } else { |
| stop('"unit" should be one of ', oxford_paste(names(valid_units), "or"), call.=FALSE) |
| } |
| if (!(unit %in% valid_units)) { |
| stop('"unit" should be one of ', oxford_paste(valid_units, "or"), call.=FALSE) |
| } |
| unit |
| } |
| |
| #' @rdname data-type |
| #' @export |
| time64 <- function(unit = c("ns", "us")) { |
| if (is.character(unit)) { |
| unit <- match.arg(unit) |
| } |
| unit <- make_valid_time_unit(unit, valid_time64_units) |
| shared_ptr(Time64, Time64__initialize(unit)) |
| } |
| |
| #' @rdname data-type |
| #' @export |
| null <- function() shared_ptr(Null, Null__initialize()) |
| |
| #' @rdname data-type |
| #' @export |
| timestamp <- function(unit = c("s", "ms", "us", "ns"), timezone) { |
| if (is.character(unit)) { |
| unit <- match.arg(unit) |
| } |
| unit <- make_valid_time_unit(unit, c(valid_time64_units, valid_time32_units)) |
| if (missing(timezone)) { |
| shared_ptr(Timestamp, Timestamp__initialize1(unit)) |
| } else { |
| assert_that(is.character(timezone), length(timezone) == 1) |
| shared_ptr(Timestamp, Timestamp__initialize2(unit, timezone)) |
| } |
| } |
| |
| #' @rdname data-type |
| #' @export |
| decimal <- function(precision, scale) { |
| shared_ptr(Decimal128Type, Decimal128Type__initialize(precision, scale)) |
| } |