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arrjson.go
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arrjson.go
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// 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.
// Package arrjson provides types and functions to encode and decode ARROW types and data
// to and from JSON files.
package arrjson
import (
"bytes"
"encoding/hex"
"encoding/json"
"math/big"
"strconv"
"strings"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/array"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/bitutil"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/decimal128"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/float16"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/ipc"
"github.com/jiuzhiqian/aliyun-odps-go-sdk/arrow/memory"
"golang.org/x/xerrors"
)
type Schema struct {
Fields []FieldWrapper `json:"fields"`
arrowMeta arrow.Metadata `json:"-"`
Metadata []metaKV `json:"metadata,omitempty"`
}
func (s Schema) MarshalJSON() ([]byte, error) {
if s.arrowMeta.Len() > 0 {
s.Metadata = make([]metaKV, 0, s.arrowMeta.Len())
keys := s.arrowMeta.Keys()
vals := s.arrowMeta.Values()
for i := range keys {
s.Metadata = append(s.Metadata, metaKV{Key: keys[i], Value: vals[i]})
}
}
type alias Schema
var buf bytes.Buffer
enc := json.NewEncoder(&buf)
enc.SetEscapeHTML(false)
err := enc.Encode(alias(s))
return buf.Bytes(), err
}
func (s *Schema) UnmarshalJSON(data []byte) error {
type Alias Schema
aux := &struct {
*Alias
}{Alias: (*Alias)(s)}
if err := json.Unmarshal(data, &aux); err != nil {
return err
}
var (
mdkeys = make([]string, 0)
mdvals = make([]string, 0)
)
for _, kv := range s.Metadata {
mdkeys = append(mdkeys, kv.Key)
mdvals = append(mdvals, kv.Value)
}
if len(s.Metadata) > 0 {
s.arrowMeta = arrow.NewMetadata(mdkeys, mdvals)
}
return nil
}
// FieldWrapper gets used in order to hook into the JSON marshalling and
// unmarshalling without creating an infinite loop when dealing with the
// children fields.
type FieldWrapper struct {
Field
}
type Field struct {
Name string `json:"name"`
// the arrowType will get populated during unmarshalling by processing the
// Type, and will be used to generate the Type during Marshalling to JSON
arrowType arrow.DataType `json:"-"`
// leave this as a json RawMessage in order to partially unmarshal as needed
// during marshal/unmarshal time so we can determine what the structure is
// actually expected to be.
Type json.RawMessage `json:"type"`
Nullable bool `json:"nullable"`
Children []FieldWrapper `json:"children"`
arrowMeta arrow.Metadata `json:"-"`
Metadata []metaKV `json:"metadata,omitempty"`
}
type metaKV struct {
Key string `json:"key"`
Value string `json:"value"`
}
func (f FieldWrapper) MarshalJSON() ([]byte, error) {
// for extension types, add the extension type metadata appropriately
// and then marshal as normal for the storage type.
if f.arrowType.ID() == arrow.EXTENSION {
exType := f.arrowType.(arrow.ExtensionType)
mdkeys := append(f.arrowMeta.Keys(), ipc.ExtensionTypeKeyName)
mdvals := append(f.arrowMeta.Values(), exType.ExtensionName())
serializedData := exType.Serialize()
if len(serializedData) > 0 {
mdkeys = append(mdkeys, ipc.ExtensionMetadataKeyName)
mdvals = append(mdvals, string(serializedData))
}
f.arrowMeta = arrow.NewMetadata(mdkeys, mdvals)
f.arrowType = exType.StorageType()
}
var typ interface{}
switch dt := f.arrowType.(type) {
case *arrow.NullType:
typ = nameJSON{"null"}
case *arrow.BooleanType:
typ = nameJSON{"bool"}
case *arrow.Int8Type:
typ = bitWidthJSON{Name: "int", Signed: true, BitWidth: 8}
case *arrow.Int16Type:
typ = bitWidthJSON{Name: "int", Signed: true, BitWidth: 16}
case *arrow.Int32Type:
typ = bitWidthJSON{Name: "int", Signed: true, BitWidth: 32}
case *arrow.Int64Type:
typ = bitWidthJSON{Name: "int", Signed: true, BitWidth: 64}
case *arrow.Uint8Type:
typ = bitWidthJSON{Name: "int", Signed: false, BitWidth: 8}
case *arrow.Uint16Type:
typ = bitWidthJSON{Name: "int", Signed: false, BitWidth: 16}
case *arrow.Uint32Type:
typ = bitWidthJSON{Name: "int", Signed: false, BitWidth: 32}
case *arrow.Uint64Type:
typ = bitWidthJSON{Name: "int", Signed: false, BitWidth: 64}
case *arrow.Float16Type:
typ = floatJSON{"floatingpoint", "HALF"}
case *arrow.Float32Type:
typ = floatJSON{"floatingpoint", "SINGLE"}
case *arrow.Float64Type:
typ = floatJSON{"floatingpoint", "DOUBLE"}
case *arrow.BinaryType:
typ = nameJSON{"binary"}
case *arrow.StringType:
typ = nameJSON{"utf8"}
case *arrow.Date32Type:
typ = unitZoneJSON{Name: "date", Unit: "DAY"}
case *arrow.Date64Type:
typ = unitZoneJSON{Name: "date", Unit: "MILLISECOND"}
case *arrow.MonthIntervalType:
typ = unitZoneJSON{Name: "interval", Unit: "YEAR_MONTH"}
case *arrow.DayTimeIntervalType:
typ = unitZoneJSON{Name: "interval", Unit: "DAY_TIME"}
case *arrow.MonthDayNanoIntervalType:
typ = unitZoneJSON{Name: "interval", Unit: "MONTH_DAY_NANO"}
case *arrow.DurationType:
switch dt.Unit {
case arrow.Second:
typ = unitZoneJSON{Name: "duration", Unit: "SECOND"}
case arrow.Millisecond:
typ = unitZoneJSON{Name: "duration", Unit: "MILLISECOND"}
case arrow.Microsecond:
typ = unitZoneJSON{Name: "duration", Unit: "MICROSECOND"}
case arrow.Nanosecond:
typ = unitZoneJSON{Name: "duration", Unit: "NANOSECOND"}
}
case *arrow.Time32Type:
switch dt.Unit {
case arrow.Second:
typ = bitWidthJSON{Name: "time", BitWidth: dt.BitWidth(), Unit: "SECOND"}
case arrow.Millisecond:
typ = bitWidthJSON{Name: "time", BitWidth: dt.BitWidth(), Unit: "MILLISECOND"}
}
case *arrow.Time64Type:
switch dt.Unit {
case arrow.Microsecond:
typ = bitWidthJSON{Name: "time", BitWidth: dt.BitWidth(), Unit: "MICROSECOND"}
case arrow.Nanosecond:
typ = bitWidthJSON{Name: "time", BitWidth: dt.BitWidth(), Unit: "NANOSECOND"}
}
case *arrow.TimestampType:
switch dt.Unit {
case arrow.Second:
typ = unitZoneJSON{Name: "timestamp", Unit: "SECOND", TimeZone: dt.TimeZone}
case arrow.Millisecond:
typ = unitZoneJSON{Name: "timestamp", Unit: "MILLISECOND", TimeZone: dt.TimeZone}
case arrow.Microsecond:
typ = unitZoneJSON{Name: "timestamp", Unit: "MICROSECOND", TimeZone: dt.TimeZone}
case arrow.Nanosecond:
typ = unitZoneJSON{Name: "timestamp", Unit: "NANOSECOND", TimeZone: dt.TimeZone}
}
case *arrow.ListType:
typ = nameJSON{"list"}
case *arrow.MapType:
typ = mapJSON{Name: "map", KeysSorted: dt.KeysSorted}
case *arrow.StructType:
typ = nameJSON{"struct"}
case *arrow.FixedSizeListType:
typ = listSizeJSON{"fixedsizelist", dt.Len()}
case *arrow.FixedSizeBinaryType:
typ = byteWidthJSON{"fixedsizebinary", dt.ByteWidth}
case *arrow.Decimal128Type:
typ = decimalJSON{"decimal", int(dt.Scale), int(dt.Precision)}
default:
return nil, xerrors.Errorf("unknown arrow.DataType %v", f.arrowType)
}
var err error
if f.Type, err = json.Marshal(typ); err != nil {
return nil, err
}
// if we have metadata then add the key/value pairs to the json
if f.arrowMeta.Len() > 0 {
f.Metadata = make([]metaKV, 0, f.arrowMeta.Len())
for i := 0; i < f.arrowMeta.Len(); i++ {
f.Metadata = append(f.Metadata, metaKV{Key: f.arrowMeta.Keys()[i], Value: f.arrowMeta.Values()[i]})
}
}
var buf bytes.Buffer
enc := json.NewEncoder(&buf)
enc.SetEscapeHTML(false)
err = enc.Encode(f.Field)
return buf.Bytes(), err
}
func (f *FieldWrapper) UnmarshalJSON(data []byte) error {
if err := json.Unmarshal(data, &f.Field); err != nil {
return err
}
tmp := nameJSON{}
if err := json.Unmarshal(f.Type, &tmp); err != nil {
return err
}
switch tmp.Name {
case "null":
f.arrowType = arrow.Null
case "bool":
f.arrowType = arrow.FixedWidthTypes.Boolean
case "int":
t := bitWidthJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.Signed {
case true:
switch t.BitWidth {
case 8:
f.arrowType = arrow.PrimitiveTypes.Int8
case 16:
f.arrowType = arrow.PrimitiveTypes.Int16
case 32:
f.arrowType = arrow.PrimitiveTypes.Int32
case 64:
f.arrowType = arrow.PrimitiveTypes.Int64
}
default:
switch t.BitWidth {
case 8:
f.arrowType = arrow.PrimitiveTypes.Uint8
case 16:
f.arrowType = arrow.PrimitiveTypes.Uint16
case 32:
f.arrowType = arrow.PrimitiveTypes.Uint32
case 64:
f.arrowType = arrow.PrimitiveTypes.Uint64
}
}
case "floatingpoint":
t := floatJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.Precision {
case "HALF":
f.arrowType = arrow.FixedWidthTypes.Float16
case "SINGLE":
f.arrowType = arrow.PrimitiveTypes.Float32
case "DOUBLE":
f.arrowType = arrow.PrimitiveTypes.Float64
}
case "binary":
f.arrowType = arrow.BinaryTypes.Binary
case "utf8":
f.arrowType = arrow.BinaryTypes.String
case "date":
t := unitZoneJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.Unit {
case "DAY":
f.arrowType = arrow.FixedWidthTypes.Date32
case "MILLISECOND":
f.arrowType = arrow.FixedWidthTypes.Date64
}
case "time":
t := bitWidthJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.BitWidth {
case 32:
switch t.Unit {
case "SECOND":
f.arrowType = arrow.FixedWidthTypes.Time32s
case "MILLISECOND":
f.arrowType = arrow.FixedWidthTypes.Time32ms
}
case 64:
switch t.Unit {
case "MICROSECOND":
f.arrowType = arrow.FixedWidthTypes.Time64us
case "NANOSECOND":
f.arrowType = arrow.FixedWidthTypes.Time64ns
}
}
case "timestamp":
t := unitZoneJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
f.arrowType = &arrow.TimestampType{TimeZone: t.TimeZone}
switch t.Unit {
case "SECOND":
f.arrowType.(*arrow.TimestampType).Unit = arrow.Second
case "MILLISECOND":
f.arrowType.(*arrow.TimestampType).Unit = arrow.Millisecond
case "MICROSECOND":
f.arrowType.(*arrow.TimestampType).Unit = arrow.Microsecond
case "NANOSECOND":
f.arrowType.(*arrow.TimestampType).Unit = arrow.Nanosecond
}
case "list":
f.arrowType = arrow.ListOfField(arrow.Field{
Name: f.Children[0].Name,
Type: f.Children[0].arrowType,
Metadata: f.Children[0].arrowMeta,
Nullable: f.Children[0].Nullable,
})
case "map":
t := mapJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
pairType := f.Children[0].arrowType
f.arrowType = arrow.MapOf(pairType.(*arrow.StructType).Field(0).Type, pairType.(*arrow.StructType).Field(1).Type)
f.arrowType.(*arrow.MapType).KeysSorted = t.KeysSorted
case "struct":
f.arrowType = arrow.StructOf(fieldsFromJSON(f.Children)...)
case "fixedsizebinary":
t := byteWidthJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
f.arrowType = &arrow.FixedSizeBinaryType{ByteWidth: t.ByteWidth}
case "fixedsizelist":
t := listSizeJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
f.arrowType = arrow.FixedSizeListOfField(t.ListSize, arrow.Field{
Name: f.Children[0].Name,
Type: f.Children[0].arrowType,
Metadata: f.Children[0].arrowMeta,
Nullable: f.Children[0].Nullable,
})
case "interval":
t := unitZoneJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.Unit {
case "YEAR_MONTH":
f.arrowType = arrow.FixedWidthTypes.MonthInterval
case "DAY_TIME":
f.arrowType = arrow.FixedWidthTypes.DayTimeInterval
case "MONTH_DAY_NANO":
f.arrowType = arrow.FixedWidthTypes.MonthDayNanoInterval
}
case "duration":
t := unitZoneJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
switch t.Unit {
case "SECOND":
f.arrowType = arrow.FixedWidthTypes.Duration_s
case "MILLISECOND":
f.arrowType = arrow.FixedWidthTypes.Duration_ms
case "MICROSECOND":
f.arrowType = arrow.FixedWidthTypes.Duration_us
case "NANOSECOND":
f.arrowType = arrow.FixedWidthTypes.Duration_ns
}
case "decimal":
t := decimalJSON{}
if err := json.Unmarshal(f.Type, &t); err != nil {
return err
}
f.arrowType = &arrow.Decimal128Type{Precision: int32(t.Precision), Scale: int32(t.Scale)}
}
if f.arrowType == nil {
return xerrors.Errorf("unhandled type unmarshalling from json: %s", tmp.Name)
}
var err error
if len(f.Metadata) > 0 { // unmarshal the key/value metadata pairs
var (
mdkeys = make([]string, 0, len(f.Metadata))
mdvals = make([]string, 0, len(f.Metadata))
extKeyIdx int = -1
extDataIdx int = -1
)
for i, kv := range f.Metadata {
switch kv.Key {
case ipc.ExtensionTypeKeyName:
extKeyIdx = i
case ipc.ExtensionMetadataKeyName:
extDataIdx = i
}
mdkeys = append(mdkeys, kv.Key)
mdvals = append(mdvals, kv.Value)
}
if extKeyIdx == -1 { // no extension metadata just create the metadata
f.arrowMeta = arrow.NewMetadata(mdkeys, mdvals)
return nil
}
extType := arrow.GetExtensionType(mdvals[extKeyIdx])
if extType == nil { // unregistered extension type, just keep the metadata
f.arrowMeta = arrow.NewMetadata(mdkeys, mdvals)
return nil
}
var extData string
if extDataIdx > -1 {
extData = mdvals[extDataIdx]
// if both extension type and extension type metadata exist
// filter out both keys
newkeys := make([]string, 0, len(mdkeys)-2)
newvals := make([]string, 0, len(mdvals)-2)
for i := range mdkeys {
if i != extKeyIdx && i != extDataIdx {
newkeys = append(newkeys, mdkeys[i])
newvals = append(newvals, mdvals[i])
}
}
mdkeys = newkeys
mdvals = newvals
} else {
// if only extension type key is present, we can simplify filtering it out
mdkeys = append(mdkeys[:extKeyIdx], mdkeys[extKeyIdx+1:]...)
mdvals = append(mdvals[:extKeyIdx], mdvals[extKeyIdx+1:]...)
}
if f.arrowType, err = extType.Deserialize(f.arrowType, extData); err != nil {
return err
}
f.arrowMeta = arrow.NewMetadata(mdkeys, mdvals)
}
return err
}
// the structs below represent various configurations of the Type
// json block and what fields will be expected. Sometimes there is
// overlap between the same key used with different types, so it's
// easier to partial unmarshal and then use these to ensure correct
// typing.
type nameJSON struct {
Name string `json:"name"`
}
type listSizeJSON struct {
Name string `json:"name"`
ListSize int32 `json:"listSize,omitempty"`
}
type bitWidthJSON struct {
Name string `json:"name"`
Signed bool `json:"isSigned,omitempty"`
BitWidth int `json:"bitWidth,omitempty"`
Unit string `json:"unit,omitempty"`
}
type floatJSON struct {
Name string `json:"name"`
Precision string `json:"precision,omitempty"`
}
type unitZoneJSON struct {
Name string `json:"name"`
Unit string `json:"unit,omitempty"`
TimeZone string `json:"timezone,omitempty"`
}
type decimalJSON struct {
Name string `json:"name"`
Scale int `json:"scale,omitempty"`
Precision int `json:"precision,omitempty"`
}
type byteWidthJSON struct {
Name string `json:"name"`
ByteWidth int `json:"byteWidth,omitempty"`
}
type mapJSON struct {
Name string `json:"name"`
KeysSorted bool `json:"keysSorted,omitempty"`
}
func schemaToJSON(schema *arrow.Schema) Schema {
return Schema{
Fields: fieldsToJSON(schema.Fields()),
arrowMeta: schema.Metadata(),
}
}
func schemaFromJSON(schema Schema) *arrow.Schema {
return arrow.NewSchema(fieldsFromJSON(schema.Fields), &schema.arrowMeta)
}
func fieldsToJSON(fields []arrow.Field) []FieldWrapper {
o := make([]FieldWrapper, len(fields))
for i, f := range fields {
o[i] = FieldWrapper{Field{
Name: f.Name,
arrowType: f.Type,
Nullable: f.Nullable,
Children: []FieldWrapper{},
arrowMeta: f.Metadata,
}}
switch dt := f.Type.(type) {
case *arrow.ListType:
o[i].Children = fieldsToJSON([]arrow.Field{dt.ElemField()})
case *arrow.FixedSizeListType:
o[i].Children = fieldsToJSON([]arrow.Field{dt.ElemField()})
case *arrow.StructType:
o[i].Children = fieldsToJSON(dt.Fields())
case *arrow.MapType:
o[i].Children = fieldsToJSON([]arrow.Field{dt.ValueField()})
}
}
return o
}
func fieldsFromJSON(fields []FieldWrapper) []arrow.Field {
vs := make([]arrow.Field, len(fields))
for i, v := range fields {
vs[i] = fieldFromJSON(v.Field)
}
return vs
}
func fieldFromJSON(f Field) arrow.Field {
return arrow.Field{
Name: f.Name,
Type: f.arrowType,
Nullable: f.Nullable,
Metadata: f.arrowMeta,
}
}
type Record struct {
Count int64 `json:"count"`
Columns []Array `json:"columns"`
}
func recordsFromJSON(mem memory.Allocator, schema *arrow.Schema, recs []Record) []array.Record {
vs := make([]array.Record, len(recs))
for i, rec := range recs {
vs[i] = recordFromJSON(mem, schema, rec)
}
return vs
}
func recordFromJSON(mem memory.Allocator, schema *arrow.Schema, rec Record) array.Record {
arrs := arraysFromJSON(mem, schema, rec.Columns)
defer func() {
for _, arr := range arrs {
arr.Release()
}
}()
return array.NewRecord(schema, arrs, int64(rec.Count))
}
func recordToJSON(rec array.Record) Record {
return Record{
Count: rec.NumRows(),
Columns: arraysToJSON(rec.Schema(), rec.Columns()),
}
}
type Array struct {
Name string `json:"name"`
Count int `json:"count"`
Valids []int `json:"VALIDITY,omitempty"`
Data []interface{} `json:"DATA,omitempty"`
Offset []int32 `json:"OFFSET,omitempty"`
Children []Array `json:"children,omitempty"`
}
func arraysFromJSON(mem memory.Allocator, schema *arrow.Schema, arrs []Array) []array.Interface {
o := make([]array.Interface, len(arrs))
for i, v := range arrs {
o[i] = arrayFromJSON(mem, schema.Field(i).Type, v)
}
return o
}
func arraysToJSON(schema *arrow.Schema, arrs []array.Interface) []Array {
o := make([]Array, len(arrs))
for i, v := range arrs {
o[i] = arrayToJSON(schema.Field(i), v)
}
return o
}
func validsToBitmap(valids []bool, mem memory.Allocator) *memory.Buffer {
buf := memory.NewResizableBuffer(mem)
buf.Resize(int(bitutil.BytesForBits(int64(len(valids)))))
wr := bitutil.NewBitmapWriter(buf.Bytes(), 0, len(valids))
wr.AppendBools(valids)
wr.Finish()
return buf
}
func arrayFromJSON(mem memory.Allocator, dt arrow.DataType, arr Array) array.Interface {
switch dt := dt.(type) {
case *arrow.NullType:
return array.NewNull(arr.Count)
case *arrow.BooleanType:
bldr := array.NewBooleanBuilder(mem)
defer bldr.Release()
data := boolsFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Int8Type:
bldr := array.NewInt8Builder(mem)
defer bldr.Release()
data := i8FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Int16Type:
bldr := array.NewInt16Builder(mem)
defer bldr.Release()
data := i16FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Int32Type:
bldr := array.NewInt32Builder(mem)
defer bldr.Release()
data := i32FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Int64Type:
bldr := array.NewInt64Builder(mem)
defer bldr.Release()
data := i64FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Uint8Type:
bldr := array.NewUint8Builder(mem)
defer bldr.Release()
data := u8FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Uint16Type:
bldr := array.NewUint16Builder(mem)
defer bldr.Release()
data := u16FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Uint32Type:
bldr := array.NewUint32Builder(mem)
defer bldr.Release()
data := u32FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Uint64Type:
bldr := array.NewUint64Builder(mem)
defer bldr.Release()
data := u64FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Float16Type:
bldr := array.NewFloat16Builder(mem)
defer bldr.Release()
data := f16FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Float32Type:
bldr := array.NewFloat32Builder(mem)
defer bldr.Release()
data := f32FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Float64Type:
bldr := array.NewFloat64Builder(mem)
defer bldr.Release()
data := f64FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.StringType:
bldr := array.NewStringBuilder(mem)
defer bldr.Release()
data := strFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.BinaryType:
bldr := array.NewBinaryBuilder(mem, dt)
defer bldr.Release()
data := bytesFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.ListType:
valids := validsFromJSON(arr.Valids)
elems := arrayFromJSON(mem, dt.Elem(), arr.Children[0])
defer elems.Release()
bitmap := validsToBitmap(valids, mem)
defer bitmap.Release()
nulls := arr.Count - bitutil.CountSetBits(bitmap.Bytes(), 0, arr.Count)
data := array.NewData(dt, arr.Count, []*memory.Buffer{bitmap,
memory.NewBufferBytes(arrow.Int32Traits.CastToBytes(arr.Offset))},
[]*array.Data{elems.Data()}, nulls, 0)
defer data.Release()
return array.NewListData(data)
case *arrow.FixedSizeListType:
valids := validsFromJSON(arr.Valids)
elems := arrayFromJSON(mem, dt.Elem(), arr.Children[0])
defer elems.Release()
bitmap := validsToBitmap(valids, mem)
defer bitmap.Release()
nulls := arr.Count - bitutil.CountSetBits(bitmap.Bytes(), 0, arr.Count)
data := array.NewData(dt, arr.Count, []*memory.Buffer{bitmap}, []*array.Data{elems.Data()}, nulls, 0)
defer data.Release()
return array.NewFixedSizeListData(data)
case *arrow.StructType:
valids := validsFromJSON(arr.Valids)
bitmap := validsToBitmap(valids, mem)
defer bitmap.Release()
nulls := arr.Count - bitutil.CountSetBits(bitmap.Bytes(), 0, arr.Count)
fields := make([]*array.Data, len(dt.Fields()))
for i := range fields {
child := arrayFromJSON(mem, dt.Field(i).Type, arr.Children[i])
defer child.Release()
fields[i] = child.Data()
}
data := array.NewData(dt, arr.Count, []*memory.Buffer{bitmap}, fields, nulls, 0)
defer data.Release()
return array.NewStructData(data)
case *arrow.FixedSizeBinaryType:
bldr := array.NewFixedSizeBinaryBuilder(mem, dt)
defer bldr.Release()
strdata := strFromJSON(arr.Data)
data := make([][]byte, len(strdata))
for i, v := range strdata {
if len(v) != 2*dt.ByteWidth {
panic(xerrors.Errorf("arrjson: invalid hex-string length (got=%d, want=%d)", len(v), 2*dt.ByteWidth))
}
vv, err := hex.DecodeString(v)
if err != nil {
panic(err)
}
data[i] = vv
}
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.MapType:
valids := validsFromJSON(arr.Valids)
elems := arrayFromJSON(mem, dt.ValueType(), arr.Children[0])
defer elems.Release()
bitmap := validsToBitmap(valids, mem)
defer bitmap.Release()
nulls := arr.Count - bitutil.CountSetBits(bitmap.Bytes(), 0, arr.Count)
data := array.NewData(dt, arr.Count, []*memory.Buffer{bitmap,
memory.NewBufferBytes(arrow.Int32Traits.CastToBytes(arr.Offset))},
[]*array.Data{elems.Data()}, nulls, 0)
defer data.Release()
return array.NewMapData(data)
case *arrow.Date32Type:
bldr := array.NewDate32Builder(mem)
defer bldr.Release()
data := date32FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Date64Type:
bldr := array.NewDate64Builder(mem)
defer bldr.Release()
data := date64FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Time32Type:
bldr := array.NewTime32Builder(mem, dt)
defer bldr.Release()
data := time32FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Time64Type:
bldr := array.NewTime64Builder(mem, dt)
defer bldr.Release()
data := time64FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.TimestampType:
bldr := array.NewTimestampBuilder(mem, dt)
defer bldr.Release()
data := timestampFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.MonthIntervalType:
bldr := array.NewMonthIntervalBuilder(mem)
defer bldr.Release()
data := monthintervalFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.DayTimeIntervalType:
bldr := array.NewDayTimeIntervalBuilder(mem)
defer bldr.Release()
data := daytimeintervalFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.MonthDayNanoIntervalType:
bldr := array.NewMonthDayNanoIntervalBuilder(mem)
defer bldr.Release()
data := monthDayNanointervalFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.DurationType:
bldr := array.NewDurationBuilder(mem, dt)
defer bldr.Release()
data := durationFromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case *arrow.Decimal128Type:
bldr := array.NewDecimal128Builder(mem, dt)
defer bldr.Release()
data := decimal128FromJSON(arr.Data)
valids := validsFromJSON(arr.Valids)
bldr.AppendValues(data, valids)
return bldr.NewArray()
case arrow.ExtensionType:
storage := arrayFromJSON(mem, dt.StorageType(), arr)
defer storage.Release()
return array.NewExtensionArrayWithStorage(dt, storage)
default:
panic(xerrors.Errorf("unknown data type %v %T", dt, dt))
}
panic("impossible")
}
func arrayToJSON(field arrow.Field, arr array.Interface) Array {
switch arr := arr.(type) {
case *array.Null:
return Array{
Name: field.Name,
Count: arr.Len(),
}
case *array.Boolean:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: boolsToJSON(arr),
Valids: validsToJSON(arr),
}
case *array.Int8:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: i8ToJSON(arr),
Valids: validsToJSON(arr),
}
case *array.Int16:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: i16ToJSON(arr),
Valids: validsToJSON(arr),
}
case *array.Int32:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: i32ToJSON(arr),
Valids: validsToJSON(arr),
}
case *array.Int64:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: i64ToJSON(arr),
Valids: validsToJSON(arr),
}
case *array.Uint8:
return Array{
Name: field.Name,
Count: arr.Len(),
Data: u8ToJSON(arr),
Valids: validsToJSON(arr),