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local.go
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local.go
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package main
import (
"os"
"github.com/xitongsys/parquet-go/source"
)
type LocalFile struct {
FilePath string
File *os.File
}
func NewLocalFileWriter(name string) (source.ParquetFile, error) {
return (&LocalFile{}).Create(name)
}
func NewLocalFileReader(name string) (source.ParquetFile, error) {
return (&LocalFile{}).Open(name)
}
func (localFile *LocalFile) Create(name string) (source.ParquetFile, error) {
file, err := os.Create(name)
myFile := new(LocalFile)
myFile.FilePath = name
myFile.File = file
return myFile, err
}
func (localFile *LocalFile) Open(name string) (source.ParquetFile, error) {
var (
err error
)
if name == "" {
name = localFile.FilePath
}
myFile := new(LocalFile)
myFile.FilePath = name
myFile.File, err = os.Open(name)
return myFile, err
}
func (localFile *LocalFile) Seek(offset int64, pos int) (int64, error) {
return localFile.File.Seek(offset, pos)
}
func (localFile *LocalFile) Read(b []byte) (cnt int, err error) {
var n int
ln := len(b)
for cnt < ln {
n, err = localFile.File.Read(b[cnt:])
cnt += n
if err != nil {
break
}
}
return cnt, err
}
func (localFile *LocalFile) Write(b []byte) (n int, err error) {
return localFile.File.Write(b)
}
func (localFile *LocalFile) Close() error {
return localFile.File.Close()
}