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json.go
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/
json.go
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package main
import (
"encoding/json"
"io"
"strconv"
)
func (r *Row) MarshalJSON() ([]byte, error) {
var err error
b := []byte{'{'}
for i, val := range r.Values {
// is the value numeric?
_, convErr := strconv.ParseFloat(val, 64)
if i != 0 {
b = append(b, ',')
}
b = append(b, '"')
b = append(b, append([]byte(r.ColumnNames[i]), []byte{'"', ':'}...)...)
if convErr == nil {
b = append(b, []byte(val)...)
} else {
b = append(b, append([]byte{'"'}, append([]byte(val), '"')...)...)
}
}
b = append(b, '}')
return b, err
}
func writeJSONRows(writer io.Writer, ch <-chan *Row) error {
first := true
var err error
var jsonBytes []byte
for row := range ch {
if first {
first = !first
_, err = writer.Write([]byte{'['})
if err != nil {
return err
}
} else {
_, err = writer.Write([]byte{','})
if err != nil {
return err
}
}
jsonBytes, err = json.Marshal(row)
if err != nil {
return err
}
_, err = writer.Write(jsonBytes)
if err != nil {
return err
}
}
_, err = writer.Write([]byte{']'})
if err != nil {
return err
}
return nil
}