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f5f4f0872e
issue: #28272 Numpy does not support array type import. Array type data is imported through parquet. Signed-off-by: Cai Zhang <cai.zhang@zilliz.com>
118 lines
2.9 KiB
Go
118 lines
2.9 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"io"
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"github.com/cockroachdb/errors"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/pkg/log"
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)
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var errInvalid = errors.New("invalid argument")
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// MemoryFile implements the FileReader interface
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type MemoryFile struct {
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data []byte
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position int
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}
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// NewMemoryFile creates a new instance of MemoryFile
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func NewMemoryFile(data []byte) *MemoryFile {
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return &MemoryFile{data: data}
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}
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// ReadAt implements the ReadAt method of the io.ReaderAt interface
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func (mf *MemoryFile) ReadAt(p []byte, off int64) (n int, err error) {
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if off < 0 || int64(int(off)) < off {
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return 0, errInvalid
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}
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if off > int64(len(mf.data)) {
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return 0, io.EOF
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}
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n = copy(p, mf.data[off:])
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mf.position += n
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if n < len(p) {
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return n, io.EOF
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}
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return n, nil
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}
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// Seek implements the Seek method of the io.Seeker interface
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func (mf *MemoryFile) Seek(offset int64, whence int) (int64, error) {
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var newOffset int64
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switch whence {
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case io.SeekStart:
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newOffset = offset
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case io.SeekCurrent:
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newOffset = int64(mf.position) + offset
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case io.SeekEnd:
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newOffset = int64(len(mf.data)) + offset
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default:
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return 0, errInvalid
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}
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if newOffset < 0 {
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return 0, errInvalid
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}
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mf.position = int(newOffset)
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return newOffset, nil
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}
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// Read implements the Read method of the io.Reader interface
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func (mf *MemoryFile) Read(p []byte) (n int, err error) {
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if mf.position >= len(mf.data) {
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return 0, io.EOF
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}
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n = copy(p, mf.data[mf.position:])
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mf.position += n
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return n, nil
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}
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// Write implements the Write method of the io.Writer interface
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func (mf *MemoryFile) Write(p []byte) (n int, err error) {
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// Write data to memory
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mf.data = append(mf.data, p...)
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return len(p), nil
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}
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// Close implements the Close method of the io.Closer interface
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func (mf *MemoryFile) Close() error {
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// Memory file does not need a close operation
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return nil
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}
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type AzureFile struct {
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*MemoryFile
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}
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func NewAzureFile(body io.ReadCloser) *AzureFile {
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data, err := io.ReadAll(body)
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defer body.Close()
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if err != nil && err != io.EOF {
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log.Warn("create azure file failed, read data failed", zap.Error(err))
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return &AzureFile{
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NewMemoryFile(nil),
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}
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}
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return &AzureFile{
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NewMemoryFile(data),
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}
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}
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