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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.
//go:build cdata_test
// +build cdata_test
package main
import (
"fmt"
"runtime"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/cdata"
"github.com/apache/arrow-go/v18/arrow/memory"
)
// #include <stdint.h>
import "C"
var alloc = memory.NewCheckedAllocator(memory.NewGoAllocator())
//export totalAllocated
func totalAllocated() int64 {
return int64(alloc.CurrentAlloc())
}
//export runGC
func runGC() {
runtime.GC()
}
//export importSchema
func importSchema(ptr uintptr) {
schema, err := cdata.ImportCArrowSchema(cdata.SchemaFromPtr(ptr))
if err != nil {
panic(err)
}
expectedMetadata := arrow.NewMetadata([]string{"key1"}, []string{"value1"})
expectedSchema := arrow.NewSchema([]arrow.Field{{Name: "ints", Type: arrow.ListOf(arrow.PrimitiveTypes.Int32), Nullable: true}}, &expectedMetadata)
if !schema.Equal(expectedSchema) {
panic(fmt.Sprintf("schema didn't match: expected %s, got %s", expectedSchema, schema))
}
if !schema.Metadata().Equal(expectedMetadata) {
panic(fmt.Sprintf("metadata didn't match: expected %s, got %s", expectedMetadata, schema.Metadata()))
}
fmt.Println("schema matches! Huzzah!")
}
//export importRecordBatch
func importRecordBatch(scptr, rbptr uintptr) {
sc := cdata.SchemaFromPtr(scptr)
rb := cdata.ArrayFromPtr(rbptr)
rec, err := cdata.ImportCRecordBatch(rb, sc)
if err != nil {
panic(err)
}
defer rec.Release()
expectedMetadata := arrow.NewMetadata([]string{"key1"}, []string{"value1"})
expectedSchema := arrow.NewSchema([]arrow.Field{{Name: "ints", Type: arrow.ListOf(arrow.PrimitiveTypes.Int32), Nullable: true}}, &expectedMetadata)
bldr := array.NewRecordBuilder(alloc, expectedSchema)
defer bldr.Release()
lb := bldr.Field(0).(*array.ListBuilder)
vb := lb.ValueBuilder().(*array.Int32Builder)
// [[[1], [], None [2, 42]]]
lb.Append(true)
vb.Append(int32(1))
lb.Append(true)
lb.Append(false)
lb.Append(true)
vb.AppendValues([]int32{2, 42}, nil)
expectedRec := bldr.NewRecord()
defer expectedRec.Release()
if !array.RecordEqual(expectedRec, rec) {
panic(fmt.Sprintf("records didn't match: expected %s\n got %s", expectedRec, rec))
}
fmt.Println("record batch matches huzzah!")
}
func makeSchema() *arrow.Schema {
meta := arrow.NewMetadata([]string{"key1"}, []string{"value1"})
return arrow.NewSchema([]arrow.Field{
{Name: "ints", Type: arrow.ListOf(arrow.PrimitiveTypes.Int32), Nullable: true},
}, &meta)
}
func makeBatch() arrow.Record {
bldr := array.NewRecordBuilder(alloc, makeSchema())
defer bldr.Release()
fbldr := bldr.Field(0).(*array.ListBuilder)
valbldr := fbldr.ValueBuilder().(*array.Int32Builder)
fbldr.Append(true)
valbldr.Append(1)
fbldr.Append(true)
fbldr.AppendNull()
fbldr.Append(true)
valbldr.Append(2)
valbldr.Append(42)
return bldr.NewRecord()
}
//export exportSchema
func exportSchema(schema uintptr) {
cdata.ExportArrowSchema(makeSchema(), cdata.SchemaFromPtr(schema))
}
//export exportRecordBatch
func exportRecordBatch(schema, record uintptr) {
batch := makeBatch()
defer batch.Release()
cdata.ExportArrowRecordBatch(batch, cdata.ArrayFromPtr(record), cdata.SchemaFromPtr(schema))
}
//export importThenExportSchema
func importThenExportSchema(input, output uintptr) {
schema, err := cdata.ImportCArrowSchema(cdata.SchemaFromPtr(input))
if err != nil {
panic(err)
}
cdata.ExportArrowSchema(schema, cdata.SchemaFromPtr(output))
}
//export importThenExportRecord
func importThenExportRecord(schemaIn, arrIn uintptr, schemaOut, arrOut uintptr) {
rec, err := cdata.ImportCRecordBatch(cdata.ArrayFromPtr(arrIn), cdata.SchemaFromPtr(schemaIn))
if err != nil {
panic(err)
}
defer rec.Release()
cdata.ExportArrowRecordBatch(rec, cdata.ArrayFromPtr(arrOut), cdata.SchemaFromPtr(schemaOut))
}
//export roundtripArray
func roundtripArray(arrIn, schema, arrOut uintptr) {
_, arr, err := cdata.ImportCArray(cdata.ArrayFromPtr(arrIn), cdata.SchemaFromPtr(schema))
if err != nil {
panic(err)
}
defer arr.Release()
outArr := cdata.ArrayFromPtr(arrOut)
cdata.ExportArrowArray(arr, outArr, nil)
}
func main() {}
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