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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 extensions_test
import (
"bytes"
"fmt"
"reflect"
"testing"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/extensions"
"github.com/apache/arrow-go/v18/arrow/memory"
"github.com/stretchr/testify/require"
)
// testBool8Type minimally implements arrow.ExtensionType, but importantly does not implement array.CustomExtensionBuilder
// so it will fall back to the storage type's default builder.
type testBool8Type struct {
arrow.ExtensionBase
}
func newTestBool8Type() *testBool8Type {
return &testBool8Type{ExtensionBase: arrow.ExtensionBase{Storage: arrow.PrimitiveTypes.Int8}}
}
func (t *testBool8Type) ArrayType() reflect.Type { return reflect.TypeOf(testBool8Array{}) }
func (t *testBool8Type) ExtensionEquals(arrow.ExtensionType) bool { panic("unimplemented") }
func (t *testBool8Type) ExtensionName() string { panic("unimplemented") }
func (t *testBool8Type) Serialize() string { panic("unimplemented") }
func (t *testBool8Type) Deserialize(arrow.DataType, string) (arrow.ExtensionType, error) {
panic("unimplemented")
}
type testBool8Array struct {
array.ExtensionArrayBase
}
func TestUnmarshalExtensionTypes(t *testing.T) {
logicalJSON := `[true,null,false,null,true]`
storageJSON := `[1,null,0,null,1]`
// extensions.Bool8Type implements array.CustomExtensionBuilder so we expect the array to be built with the custom builder
arrCustomBuilder, _, err := array.FromJSON(memory.DefaultAllocator, extensions.NewBool8Type(), bytes.NewBufferString(logicalJSON))
require.NoError(t, err)
defer arrCustomBuilder.Release()
require.Equal(t, 5, arrCustomBuilder.Len())
// testBoolType falls back to the default builder for the storage type, so it cannot deserialize native booleans
_, _, err = array.FromJSON(memory.DefaultAllocator, newTestBool8Type(), bytes.NewBufferString(logicalJSON))
require.ErrorContains(t, err, "cannot unmarshal true into Go value of type int8")
// testBoolType must build the array with the native storage type: Int8
arrDefaultBuilder, _, err := array.FromJSON(memory.DefaultAllocator, newTestBool8Type(), bytes.NewBufferString(storageJSON))
require.NoError(t, err)
defer arrDefaultBuilder.Release()
require.Equal(t, 5, arrDefaultBuilder.Len())
arrBool8, ok := arrCustomBuilder.(*extensions.Bool8Array)
require.True(t, ok)
arrExt, ok := arrDefaultBuilder.(array.ExtensionArray)
require.True(t, ok)
// The physical layout of both arrays is identical
require.True(t, array.Equal(arrBool8.Storage(), arrExt.Storage()))
}
// invalidExtensionType does not fully implement the arrow.ExtensionType interface, even though it embeds arrow.ExtensionBase
type invalidExtensionType struct {
arrow.ExtensionBase
}
func newInvalidExtensionType() *invalidExtensionType {
return &invalidExtensionType{ExtensionBase: arrow.ExtensionBase{Storage: arrow.BinaryTypes.String}}
}
func TestInvalidExtensionType(t *testing.T) {
jsonStr := `["one","two","three"]`
typ := newInvalidExtensionType()
require.PanicsWithError(t, fmt.Sprintf("arrow/array: invalid extension type: %T", typ), func() {
array.FromJSON(memory.DefaultAllocator, typ, bytes.NewBufferString(jsonStr))
})
}
var (
_ arrow.ExtensionType = (*testBool8Type)(nil)
_ array.ExtensionArray = (*testBool8Array)(nil)
)
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