80 lines
2.6 KiB
Go
80 lines
2.6 KiB
Go
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package driver
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import "time"
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// FileInfo returns information about a given path. Inspired by os.FileInfo,
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// it elides the base name method for a full path instead.
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type FileInfo interface {
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// Path provides the full path of the target of this file info.
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Path() string
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// Size returns current length in bytes of the file. The return value can
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// be used to write to the end of the file at path. The value is
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// meaningless if IsDir returns true.
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Size() int64
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// ModTime returns the modification time for the file. For backends that
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// don't have a modification time, the creation time should be returned.
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ModTime() time.Time
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// IsDir returns true if the path is a directory.
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IsDir() bool
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}
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// NOTE(stevvooe): The next two types, FileInfoFields and FileInfoInternal
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// should only be used by storagedriver implementations. They should moved to
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// a "driver" package, similar to database/sql.
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// FileInfoFields provides the exported fields for implementing FileInfo
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// interface in storagedriver implementations. It should be used with
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// InternalFileInfo.
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type FileInfoFields struct {
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// Path provides the full path of the target of this file info.
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Path string
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// Size is current length in bytes of the file. The value of this field
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// can be used to write to the end of the file at path. The value is
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// meaningless if IsDir is set to true.
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Size int64
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// ModTime returns the modification time for the file. For backends that
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// don't have a modification time, the creation time should be returned.
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ModTime time.Time
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// IsDir returns true if the path is a directory.
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IsDir bool
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}
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// FileInfoInternal implements the FileInfo interface. This should only be
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// used by storagedriver implementations that don't have a specialized
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// FileInfo type.
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type FileInfoInternal struct {
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FileInfoFields
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}
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var _ FileInfo = FileInfoInternal{}
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var _ FileInfo = &FileInfoInternal{}
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// Path provides the full path of the target of this file info.
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func (fi FileInfoInternal) Path() string {
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return fi.FileInfoFields.Path
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}
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// Size returns current length in bytes of the file. The return value can
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// be used to write to the end of the file at path. The value is
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// meaningless if IsDir returns true.
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func (fi FileInfoInternal) Size() int64 {
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return fi.FileInfoFields.Size
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}
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// ModTime returns the modification time for the file. For backends that
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// don't have a modification time, the creation time should be returned.
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func (fi FileInfoInternal) ModTime() time.Time {
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return fi.FileInfoFields.ModTime
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}
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// IsDir returns true if the path is a directory.
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func (fi FileInfoInternal) IsDir() bool {
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return fi.FileInfoFields.IsDir
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}
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