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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 array
import (
"bytes"
"encoding/base64"
"fmt"
"strings"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/internal/json"
)
// A type which represents an immutable sequence of fixed-length binary strings.
type FixedSizeBinary struct {
array
valueBytes []byte
bytewidth int32
}
// NewFixedSizeBinaryData constructs a new fixed-size binary array from data.
func NewFixedSizeBinaryData(data arrow.ArrayData) *FixedSizeBinary {
a := &FixedSizeBinary{bytewidth: int32(data.DataType().(arrow.FixedWidthDataType).BitWidth() / 8)}
a.refCount = 1
a.setData(data.(*Data))
return a
}
// Value returns the fixed-size slice at index i. This value should not be mutated.
func (a *FixedSizeBinary) Value(i int) []byte {
i += a.array.data.offset
var (
bw = int(a.bytewidth)
beg = i * bw
end = (i + 1) * bw
)
return a.valueBytes[beg:end]
}
func (a *FixedSizeBinary) ValueStr(i int) string {
if a.IsNull(i) {
return NullValueStr
}
return base64.StdEncoding.EncodeToString(a.Value(i))
}
func (a *FixedSizeBinary) String() string {
o := new(strings.Builder)
o.WriteString("[")
for i := 0; i < a.Len(); i++ {
if i > 0 {
o.WriteString(" ")
}
switch {
case a.IsNull(i):
o.WriteString(NullValueStr)
default:
fmt.Fprintf(o, "%q", a.Value(i))
}
}
o.WriteString("]")
return o.String()
}
func (a *FixedSizeBinary) setData(data *Data) {
a.array.setData(data)
vals := data.buffers[1]
if vals != nil {
a.valueBytes = vals.Bytes()
}
}
func (a *FixedSizeBinary) GetOneForMarshal(i int) interface{} {
if a.IsNull(i) {
return nil
}
return a.Value(i)
}
func (a *FixedSizeBinary) MarshalJSON() ([]byte, error) {
vals := make([]interface{}, a.Len())
for i := 0; i < a.Len(); i++ {
if a.IsValid(i) {
vals[i] = a.Value(i)
} else {
vals[i] = nil
}
}
return json.Marshal(vals)
}
func arrayEqualFixedSizeBinary(left, right *FixedSizeBinary) bool {
for i := 0; i < left.Len(); i++ {
if left.IsNull(i) {
continue
}
if !bytes.Equal(left.Value(i), right.Value(i)) {
return false
}
}
return true
}
var (
_ arrow.Array = (*FixedSizeBinary)(nil)
)
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