Class: FakeFS::File

Inherits:
StringIO
  • Object
show all
Defined in:
lib/fakefs/file.rb,
lib/fakefs/flockable_file.rb

Overview

Be careful using this, as it may break things if you obtain more that one flock per file using different descriptors. Real flock call blocks/returns false in that case - see man7.org/linux/man-pages/man2/flock.2.html, it says it “may be denied”, but it does, it fact, deny. This implementation simply returns 0. This may also be a problem if you, it fact, are accessing a real file, which is locked by another process.

Defined Under Namespace

Classes: Stat

Constant Summary collapse

MODES = 
[
  READ_ONLY           = 'r',
  READ_WRITE          = 'r+',
  WRITE_ONLY          = 'w',
  READ_WRITE_TRUNCATE = 'w+',
  APPEND_WRITE_ONLY   = 'a',
  APPEND_READ_WRITE   = 'a+'
].freeze
FMODE_READABLE = 
0x00000001
FMODE_WRITABLE = 
0x00000002
FMODE_READWRITE = 
(FMODE_READABLE | FMODE_WRITABLE)
FMODE_BINMODE = 
0x00000004
FMODE_APPEND = 
0x00000040
FMODE_CREATE = 
0x00000080
FMODE_EXCL = 
0x00000400
FMODE_TRUNC = 
0x00000800
FMODE_TEXTMODE = 
0x00001000
TEXT_MODES = 
{
  'r' => FMODE_READABLE,
  'w' => FMODE_WRITABLE | FMODE_TRUNC | FMODE_CREATE,
  'a' => FMODE_WRITABLE | FMODE_APPEND | FMODE_CREATE
}.freeze
FILE_CREATION_MODES = 
(MODES - [READ_ONLY, READ_WRITE]).freeze
FILE_ACCESS_MODE = 
(RealFile::RDONLY | RealFile::WRONLY | RealFile::RDWR)
MODE_BITMASK =

copied from github.com/ruby/ruby/blob/v2_7_8/include/ruby/io.h#L108

(
  RealFile::RDONLY |
  RealFile::WRONLY |
  RealFile::RDWR |
  RealFile::APPEND |
  RealFile::CREAT |
  RealFile::EXCL |
  RealFile::NONBLOCK |
  RealFile::TRUNC |
  RealFile::BINARY |
  (RealFile.const_defined?(:NOCTTY) ? RealFile::NOCTTY : 0) |
  (RealFile.const_defined?(:SYNC) ? RealFile::SYNC : 0)
)
DEFAULT_DIR_SIZE = 
64
DIR_ENTRY_SIZE = 
32
FAKE_FS_ALLOWED_FLOCK_MODES =

yep, File::LOCK_UN | File::LOCK_NB is allowed

[RealFile::LOCK_EX, RealFile::LOCK_SH, RealFile::LOCK_UN].flat_map do |mode|
  [mode, mode | RealFile::LOCK_NB]
end.freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, *args) ⇒ File

Returns a new instance of File.

Raises:

  • (ArgumentError) 


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# File 'lib/fakefs/file.rb', line 501

def initialize(path, *args)
  # unable to pass args otherwise on jruby, it may cause false passes on MRI, though
  # because explicit hash isn't supported
  opts = args.last.is_a?(Hash) ? args.pop : {}
  if args.size > 2
    raise ArgumentError, "wrong number of arguments (given #{args.size + 1}, expected 1..3)"
  end
  mode, _perm = args

  @path = path
  @file = FileSystem.find(@path)
  # real rb_scan_open_args - and rb_io_extract_modeenc - is much more complex
  raise ArgumentError, 'mode specified twice' unless mode.nil? || opts[:mode].nil?

  mode_opt = mode.nil? ? opts[:mode] : mode
  # see vmode_handle
  if mode_opt.nil?
    @oflags = RealFile::RDONLY
  elsif mode_opt.respond_to?(:to_int) && (intmode = mode_opt.to_int).instance_of?(Integer)
    @oflags = intmode
  else
    unless mode_opt.is_a?(String)
      unless mode_opt.respond_to?(:to_str)
        raise TypeError, "no implicit conversion of #{mode_opt.class} into String"
      end

      strmode = mode_opt.to_str
      unless strmode.is_a?(String)
        raise TypeError, "can't convert #{mode_opt.class} to String " \
          "(#{mode_opt.class}#to_str gives #{strmode.class})"
      end

      mode_opt = strmode
    end

    @oflags, @fmode = parse_strmode_oflags(mode_opt)
  end
  unless opts[:flags].nil?
    if opts[:flags].is_a?(Integer)
      @oflags |= opts[:flags]
    elsif opts[:flags].respond_to?(:to_int)
      intflags = opts[:flags].to_int
      unless intflags.instance_of?(Integer)
        raise TypeError, "can't convert #{opts[:flags].class} to Integer " \
          "(#{opts[:flags].class}#to_int gives #{intflags.class})"
      end

      @oflags |= intflags
      @fmode = create_fmode(@oflags)
    else
      raise TypeError, "no implicit conversion of #{opts[:flags].class} into Integer"
    end
  end
  @fmode ||= create_fmode(@oflags)
  @fmode = extract_binmode(opts, @fmode)

  @autoclose = true
  file_creation_mode? ? create_missing_file : check_file_existence!
  # StringIO changes enciding of the underlying string to binary
  # when binary data is written if it's opened in binary mode,
  # so content might have binary encoding. StringIO also switches to
  # binary mode if its string have binary encoding, but it might not
  # be what we want, so insteed we use encoding parsed after super call
  # and force set it back.

  # truncate doesn't work
  unless @file.is_a?(FakeFS::FakeDir)
    @file.content = @file.content.dup.force_encoding(Encoding.default_external)
  end
  # StringIO.new 'content', nil, **{} # works in MRI, but fails in JRuby
  # but File.open 'filename', nil, **{} is ok both in MRI and JRuby

  # JRuby StringIO doesn't support kwargs without mode
  #  StringIO.new "buff", encoding: 'binary' # work on MRI, fails on JRuby
  if RUBY_PLATFORM == "java"
    # other opts aren't supported
    super(@file.content, mode_opt || 'r')
    binmode if binmode? # Looks like it doesn't care about 'b'
    mode_opt_str = mode_opt.is_a?(String) ? mode_opt : ''
    raise ArgumentError, 'encoding specified twice' if mode_opt_str[':'] && opts[:encoding]

    # Might raise where real File just warns
    str_encoding = mode_opt_str.split(':')[1] # internal encoding is ignored anyway
    if opts[:encoding]
      set_encoding(opts[:encoding])
    elsif str_encoding && str_encoding != ''
      set_encoding(str_encoding)
    elsif opts[:binmode]
      set_encoding(Encoding::BINARY)
    end
  else
    super(@file.content, mode, **opts)
  end

  # StringIO is wrtable and readable by default, so we need to disable it
  # but maybe it was explicitly disabled by opts
  close_write if @fmode & FMODE_WRITABLE == 0 && !StringIO.instance_method(:closed_write?).bind(self).call
  close_read if @fmode & FMODE_READABLE == 0 && !StringIO.instance_method(:closed_read?).bind(self).call
end

Instance Attribute Details

#autoclose ⇒ Object

Returns the value of attribute autoclose.



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# File 'lib/fakefs/file.rb', line 740

def autoclose
  @autoclose
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/fakefs/file.rb', line 499

def path
  @path
end

Class Method Details

.absolute_path(file_name, dir_name = Dir.getwd) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 736

def self.absolute_path(file_name, dir_name = Dir.getwd)
  RealFile.absolute_path(file_name, dir_name)
end

.basename(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 178

def self.basename(*args)
  RealFile.basename(*args)
end

.binread(file, length = nil, offset = 0) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 337

def self.binread(file, length = nil, offset = 0)
  File.read(file, length, offset, mode: 'rb:ASCII-8BIT')
end

.binwrite(file, content, offset = nil) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 341

def self.binwrite(file, content, offset = nil)
  mode = offset ? 'r+b:ASCII-8BIT' : 'wb:ASCII-8BIT'
  File.write(file, content, offset, mode: mode)
end

.birthtime(path) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 788

def self.birthtime(path)
  if exist?(path)
    FileSystem.find(path).birthtime
  else
    raise Errno::ENOENT
  end
end

.chmod(new_mode, filename) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 300

def self.chmod(new_mode, filename)
  # chmod's mode can either be passed in in absolute mode, or symbolic mode
  # for reference: https://ruby-doc.org/stdlib-2.2.2/libdoc/fileutils/rdoc/FileUtils.html#method-c-chmod
  # if the mode is passed in symbolic mode we must convert it to absolute mode
  is_absolute_mode = new_mode.is_a? Numeric
  unless is_absolute_mode
    current_mode = FileSystem.find(filename).mode
    new_mode = convert_symbolic_chmod_to_absolute(new_mode, current_mode)
  end
  FileSystem.find(filename).mode = 0o100000 + new_mode
end

.chown(owner_int, group_int, filename) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 320

def self.chown(owner_int, group_int, filename)
  file = FileSystem.find(filename)

  if owner_int && owner_int != -1
    owner_int.is_a?(Integer) || raise(TypeError, "can't convert String into Integer")
    file.uid = owner_int
  end
  if group_int && group_int != -1
    group_int.is_a?(Integer) || raise(TypeError, "can't convert String into Integer")
    file.gid = group_int
  end
end

.const_missing(name) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 140

def self.const_missing(name)
  RealFile.const_get(name)
end

.delete(*files) ⇒ Object Also known as: unlink 



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# File 'lib/fakefs/file.rb', line 269

def self.delete(*files)
  files.each do |file|
    file_name = (file.instance_of?(FakeFS::File) ? file.path : file.to_s)
    raise Errno::ENOENT, file_name unless exist?(file_name)

    FileUtils.rm(file_name)
  end

  files.size
end

.directory?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 144

def self.directory?(path)
  if path.respond_to? :entry
    path.entry.is_a? FakeDir
  else
    result = FileSystem.find(path)
    result ? result.entry.is_a?(FakeDir) : false
  end
end

.dirname(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 182

def self.dirname(*args)
  RealFile.dirname(*args)
end

.executable?(filename) ⇒ Boolean

Not exactly right, returns true if the file is chmod +x for owner. In the context of when you would use fakefs, this is usually what you want.



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# File 'lib/fakefs/file.rb', line 314

def self.executable?(filename)
  file = FileSystem.find(filename)
  return false unless file
  (file.mode - 0o100000) & 0o100 != 0
end

.exist?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 66

def self.exist?(path)
  if File.symlink?(path)
    referent = File.expand_path(File.readlink(path), File.dirname(path))
    exist?(referent)
  else
    !FileSystem.find(path).nil?
  end
end

.expand_path(file_name, dir_string = FileSystem.current_dir.to_s) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 174

def self.expand_path(file_name, dir_string = FileSystem.current_dir.to_s)
  RealFile.expand_path(file_name, RealFile.expand_path(dir_string, Dir.pwd))
end

.extname(path) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 54

def self.extname(path)
  RealFile.extname(path)
end

.file?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 161

def self.file?(path)
  if path.respond_to? :entry
    path.entry.is_a? FakeFile
  else
    result = FileSystem.find(path)
    result ? result.entry.is_a?(FakeFile) : false
  end
end

.fnmatch?(pattern, path, flags = 0) ⇒ Boolean Also known as: fnmatch 



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# File 'lib/fakefs/file.rb', line 346

def self.fnmatch?(pattern, path, flags = 0)
  RealFile.fnmatch?(pattern, path, flags)
end

.foreach(path, *args, &block) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 217

def self.foreach(path, *args, &block)
  file = new(path)
  if file.exists?
    FileSystem.find(path).atime = Time.now
    if block_given?
      file.each_line(*args, &block)
    else
      file.each_line(*args)
    end
  else
    raise Errno::ENOENT
  end
end

.ftype(filename) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 170

def self.ftype(filename)
  File.lstat(filename).ftype
end

.identical?(one_path, another_path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 76

def identical?(one_path, another_path)
  FileSystem.find(one_path) == FileSystem.find(another_path)
end

.join(*parts) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 58

def self.join(*parts)
  RealFile.join(parts)
end

.link(source, dest) ⇒ Object

Raises:

  • (Errno::EPERM) 


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# File 'lib/fakefs/file.rb', line 257

def self.link(source, dest)
  raise Errno::EPERM, "#{source} or #{dest}" if directory?(source)
  raise Errno::ENOENT, "#{source} or #{dest}" unless exist?(source)
  raise Errno::EEXIST, "#{source} or #{dest}" if exist?(dest)

  source = FileSystem.find(source)
  dest = FileSystem.add(dest, source.entry.clone)
  source.link(dest)

  0
end

.lstat(file) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 292

def self.lstat(file)
  File::Stat.new(file, true)
end

.path(file) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 62

def self.path(file)
  RealFile.path(file)
end

.read(path, *args) ⇒ Object

TODO: support open_key_args

Raises:

  • (Errno::ENOENT) 


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# File 'lib/fakefs/file.rb', line 193

def self.read(path, *args)
  options = args[-1].is_a?(Hash) ? args.pop : {}
  length = args.empty? ? nil : args.shift
  offset = args.empty? ? 0 : args.shift
  file = new(path, **options)

  raise Errno::ENOENT unless file.exists?
  raise Errno::EISDIR, path.to_s if directory?(path)

  FileSystem.find(path).atime = Time.now
  file.seek(offset)
  file.read(length)
end

.readable?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 86

def self.readable?(path)
  return false unless exist? path
  File.lstat(path).readable?
end

.readlines(path, chomp: false) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 207

def self.readlines(path, chomp: false)
  file = new(path)
  if file.exists?
    FileSystem.find(path).atime = Time.now
    chomp ? file.readlines.map(&:chomp) : file.readlines
  else
    raise Errno::ENOENT
  end
end

.readlink(path) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/fakefs/file.rb', line 186

def self.readlink(path)
  symlink = FileSystem.find(path)
  raise Errno::ENOENT unless symlink
  symlink.target
end

.realdirpath(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 752

def self.realdirpath(*args)
  RealFile.realdirpath(*args)
end

.realpath(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 715

def self.realpath(*args)
  RealFile.realpath(*args)
end

.rename(source, dest) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 231

def self.rename(source, dest)
  if directory?(source) && file?(dest)
    raise Errno::ENOTDIR, "#{source} or #{dest}"
  elsif file?(source) && directory?(dest)
    raise Errno::EISDIR, "#{source} or #{dest}"
  elsif !exist?(dirname(dest))
    raise Errno::ENOENT, "#{source} or #{dest}"
  end

  if (target = FileSystem.find(source))
    return 0 if source == dest

    if target.is_a?(FakeFS::FakeSymlink)
      File.symlink(target.target, dest)
    else
      FileSystem.add(dest, target.entry.clone)
    end

    FileSystem.delete(source)
  else
    raise Errno::ENOENT, "#{source} or #{dest}"
  end

  0
end

.size(path) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 120

def self.size(path)
  if directory?(path)
    DEFAULT_DIR_SIZE + (DIR_ENTRY_SIZE * FileSystem.find(path).entries.size)
  else
    read(path).bytesize
  end
end

.size?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 128

def self.size?(path)
  size(path) if exist?(path) && !size(path).zero?
end

.split(path) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 296

def self.split(path)
  RealFile.split(path)
end

.stat(file) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 288

def self.stat(file)
  File::Stat.new(file)
end

.sticky?(_path) ⇒ Boolean

Assume nothing is sticky.



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# File 'lib/fakefs/file.rb', line 81

def sticky?(_path)
  false
end

.symlink(source, dest) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 284

def self.symlink(source, dest)
  FileUtils.ln_s(source, dest)
end

.symlink?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 153

def self.symlink?(path)
  if path.respond_to? :entry
    path.is_a? FakeSymlink
  else
    FileSystem.find(path).is_a? FakeSymlink
  end
end

.umask(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 333

def self.umask(*args)
  RealFile.umask(*args)
end

.utime(atime, mtime, *paths) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 106

def self.utime(atime, mtime, *paths)
  paths.each do |path|
    file_node = FileSystem.find(path)
    if file_node
      file_node.atime = atime
      file_node.mtime = mtime
    else
      raise Errno::ENOENT, "No such file or directory - #{path}"
    end
  end

  paths.size
end

.writable?(path) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 91

def self.writable?(path)
  return false unless exist? path
  File.lstat(path).writable?
end

.write(filename, contents, offset = nil, **open_args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 758

def self.write(filename, contents, offset = nil, **open_args)
  mode = offset ? 'r+' : 'w'
  if open_args[:open_args]
    # see open_key_args
    # todo: foreach, readlines, read also use it
    # Treat a final argument as keywords if it is a hash, and not as keywords otherwise.
    open_args = open_args[:open_args]
    if open_args.last.is_a?(Hash)
      args = open_args[0...-1]
      opt = open_args.last
    else
      args = open_args
      opt = {}
    end
  else
    args = [open_args.delete(:mode) || mode]
    opt = open_args
  end
  if offset
    open(filename, *args, **opt) do |f| # rubocop:disable Security/Open
      f.seek(offset)
      f.write(contents)
    end
  else
    open(filename, *args, **opt) do |f| # rubocop:disable Security/Open
      f.write(contents)
    end
  end
end

.zero?(path) ⇒ Boolean Also known as: empty? 



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# File 'lib/fakefs/file.rb', line 132

def self.zero?(path)
  exist?(path) && size(path) == 0
end

Instance Method Details

#advise(_advice, _offset = 0, _len = 0) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 756

def advise(_advice, _offset = 0, _len = 0); end

#atime ⇒ Object 



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# File 'lib/fakefs/file.rb', line 673

def atime
  self.class.atime(@path)
end

#autoclose? ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 742

def autoclose?
  @autoclose ? true : false
end

#binmode? ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 719

def binmode?
  # File.open('test_mode', mode: 'w:binary').binmode? # => false
  @fmode & FMODE_BINMODE != 0
end

#birthtime ⇒ Object 



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# File 'lib/fakefs/file.rb', line 796

def birthtime
  self.class.birthtime(@path)
end

#chmod(new_mode) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 689

def chmod(new_mode)
  # chmod's mode can either be passed in in absolute mode, or symbolic mode
  # for reference: https://ruby-doc.org/stdlib-2.2.2/libdoc/fileutils/rdoc/FileUtils.html#method-c-chmod
  # if the mode is passed in symbolic mode we must convert it to absolute mode
  is_absolute_mode = new_mode.is_a? Numeric
  unless is_absolute_mode
    current_mode = @file.mode
    new_mode = convert_symbolic_chmod_to_absolute(new_mode, current_mode)
  end
  @file.mode = 0o100000 + new_mode
end

#chown(owner_int, group_int) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 701

def chown(owner_int, group_int)
  return unless group_int && group_int != -1

  owner_int.is_a?(Integer) || raise(
    TypeError, "can't convert String into Integer"
  )
  @file.uid = owner_int

  group_int.is_a?(Integer) || raise(
    TypeError, "can't convert String into Integer"
  )
  @file.gid = group_int
end

#close_on_exec=(_bool) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 724

def close_on_exec=(_bool)
  raise NotImplementedError
end

#close_on_exec? ⇒ Boolean

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 728

def close_on_exec?
  raise NotImplementedError
end

#ctime ⇒ Object 



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# File 'lib/fakefs/file.rb', line 677

def ctime
  self.class.ctime(@path)
end

#exists? ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 601

def exists?
  true
end

#flock(mode) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 681

def flock(*)
  raise NotImplementedError
end

#ioctl ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 638

def ioctl(*)
  raise NotImplementedError
end

#is_a?(klass) ⇒ Boolean 



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# File 'lib/fakefs/file.rb', line 630

def is_a?(klass)
  RealFile.allocate.is_a?(klass)
end

#lstat ⇒ Object 



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# File 'lib/fakefs/file.rb', line 650

def lstat
  self.class.lstat(@path)
end

#mtime ⇒ Object 



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# File 'lib/fakefs/file.rb', line 685

def mtime
  self.class.mtime(@path)
end

#read_nonblock ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 642

def read_nonblock
  raise NotImplementedError
end

#readpartial ⇒ Object 



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# File 'lib/fakefs/file.rb', line 669

def readpartial(*)
  super
end

#size ⇒ Object 



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# File 'lib/fakefs/file.rb', line 748

def size
  File.size(@path)
end

#stat ⇒ Object 



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# File 'lib/fakefs/file.rb', line 646

def stat
  self.class.stat(@path)
end

#string ⇒ Object 



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# File 'lib/fakefs/file.rb', line 634

def string
  gets(nil)
end

#sysseek(position, whence = SEEK_SET) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 654

def sysseek(position, whence = SEEK_SET)
  seek(position, whence)
  pos
end

#syswrite ⇒ Object 



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# File 'lib/fakefs/file.rb', line 613

def write(*args)
  val = super(*args)
  @file.mtime = Time.now
  val
end

#to_io ⇒ Object 



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# File 'lib/fakefs/file.rb', line 661

def to_io
  self
end

#to_path ⇒ Object 



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# File 'lib/fakefs/file.rb', line 732

def to_path
  @path
end

#write(*args) ⇒ Object 



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# File 'lib/fakefs/file.rb', line 605

def write(*args)
  val = super(*args)
  @file.mtime = Time.now
  val
end

#write_nonblock ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fakefs/file.rb', line 665

def write_nonblock(*)
  raise NotImplementedError
end