Class: IO

Inherits:
Object
  • Object
show all
Defined in:
lib/torquebox/vfs/ext/io.rb

Class Method Summary collapse

Class Method Details

.read(name, *options) ⇒ Object

1.8: IO.read( portname, <length=$/ <,offset>> ) 1.9: IO.read( portname, <length=$/ <,offset>> <,options-for-open> )



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# File 'lib/torquebox/vfs/ext/io.rb', line 128

def read(name, *options)
  length, offset = options unless options.first.is_a?( Hash ) #1.9
  
  if ::File.exist_without_vfs?( name )
    read_without_vfs( name, *options )
  else
    # FIXME: we're ignoring the 1.9 options (encoding, mode, open_args)
    vfs_open( name ) do |f|
      f.seek( offset ) if offset
      f.read( length )
    end
  end
end

.read_without_vfs ⇒ Object

alias_method :open_without_vfs, :open



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# File 'lib/torquebox/vfs/ext/io.rb', line 25

alias_method :read_without_vfs, :read

.readlines(name, *options) ⇒ Object

1.8: IO.readlines( portname, separator=$/ ) 1.9: IO.readlines( portname, separator=$/ <, options-for-open> )

IO.readlines( portname, limit <, options-for-open> )
IO.readlines( portname, separator, limit <, options-for-open> )



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# File 'lib/torquebox/vfs/ext/io.rb', line 147

def readlines(name, *options)
  if ::File.exist_without_vfs?( name )
    readlines_without_vfs( name, *options )
  else
    opts = options.pop if options.last.is_a?( Hash ) #1.9
    # FIXME: we're ignoring the 1.9 options (encoding, mode, open_args)
    vfs_open( name ).readlines( *options )
  end
end

.readlines_without_vfs ⇒ Object 



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# File 'lib/torquebox/vfs/ext/io.rb', line 26

alias_method :readlines_without_vfs, :readlines

.vfs_open(fd, mode_str = 'r', &block) ⇒ Object 



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# File 'lib/torquebox/vfs/ext/io.rb', line 28

def vfs_open(fd,mode_str='r', &block)
  append   = false
  truncate = false
  write    = false
  read     = false
  create   = false
  case ( mode_str )
    when /r/
      read   = true
      write  = false
      append = false
      create = false
    when /r\+/
      read   = true
      write  = true
      create = false
      append = false
    when /w/
      read     = false
      write    = true
      create   = true
      append   = false
      truncate = true
    when /w\+/
      read   = false
      write  = true
      create = true
      append = false
      truncate = true
    when /a/
      read   = false
      write  = true
      create = true
      append = true
    when /a\+/
      read   = true
      write  = true
      create = true
    when Fixnum
      if ( mode_str & File::RDONLY != 0 )
        read  = true
        write = false
      end
      if ( mode_str & File::WRONLY != 0  )
        read  = false
        write = true
      end
      if ( mode_str & File::RDWR  != 0)
        read  = true
        write = true
      end
      if ( mode_str & File::APPEND  != 0)
        append = true
      end
      if ( mode_str & File::TRUNC  != 0)
        append = false
        truncate = true
      end
      if ( mode_str & File::CREAT  != 0)
        create = true
      end
  end

  # VFS doesn't correctly handle relative paths when
  # retrieving the physical file so expand it
  fd = File.expand_path( fd )
  virtual_file = org.jboss.vfs.VFS.child( fd )

  if ( ! create && ! virtual_file.exists )
    raise Errno::ENOENT
  end

  if ( read && ! write )
    java_in = virtual_file.open_stream()
    ruby_io = java_in.to_io
  elsif ( write && ! read )
    physical_file = virtual_file.physical_file
    java_out = java.io::FileOutputStream.new( physical_file, append )
    ruby_io = java_out.to_io
  elsif ( read && write )
    raise Error.new( "Random-access on VFS not supported" )
  end

  file_io = TorqueBox::VFS::Ext::VirtualFile.new( ruby_io, fd )

  if ( block )
    begin
      block.call( file_io )
    ensure
      file_io.close
    end
  else
    return file_io
  end

end