Method: SevenZipRuby::SevenZipReader#extract_data

Defined in:
lib/seven_zip_ruby/seven_zip_reader.rb

#extract_data(index) ⇒ Object

Extract some entries of 7zip archive and return the extracted data.

Args

index

Index of the entry to extract. :all, Integer or Array of Integer can be specified.

Examples

File.open("filename.7z", "rb") do |file|
  SevenZipRuby::SevenZipReader.open(file) do |szr|
    small_entries = szr.entries.select{ |i| i.size < 1024 }

    data_list = szr.extract_data(small_entries)
    # => [ "file contents1", "file contents2", ... ]
  end
end

File.open("filename.7z", "rb") do |file|
  SevenZipRuby::SevenZipReader.open(file) do |szr|
    largest_entry = szr.entries.max_by{ |i| i.file? ? i.size : 0 }

    data_list = szr.extract_data(largest_entry)
    # => "file contents..."
  end
end
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# File 'lib/seven_zip_ruby/seven_zip_reader.rb', line 416

def extract_data(index)
  case(index)
  when :all
    idx_prj = Object.new
    def idx_prj.[](index)
      return index
    end

    ret = []
    synchronize do
      extract_all_impl(data_proc(ret, idx_prj))
    end
    return ret

  when Enumerable
    index_list = index.map(&:to_i)
    idx_prj = Hash[*(index_list.each_with_index.map{ |idx, i| [ idx, i ] }.flatten)]

    ret = []
    synchronize do
      extract_files_impl(index_list, data_proc(ret, idx_prj))
    end
    return ret

  when nil
    raise ArgumentError.new("Invalid parameter index")

  else
    index = index.to_i
    item = entry(index)
    return nil unless (item.has_data?)

    idx_prj = Object.new
    def idx_prj.[](index)
      return 0
    end

    ret = []
    synchronize do
      extract_impl(index, data_proc(ret, idx_prj))
    end
    return ret[0]

  end
end