Class: IOStreams::Zip::Reader

Inherits:
Reader
  • Object
show all
Defined in:
lib/io_streams/zip/reader.rb

Instance Attribute Summary

Attributes inherited from Reader

#input_stream

Class Method Summary collapse

Methods inherited from Reader

#initialize, open, stream

Constructor Details

This class inherits a constructor from IOStreams::Reader

Class Method Details

.file(file_name, entry_file_name: nil, &block) ⇒ Object

Read from a zip file or stream, decompressing the contents as it is read The input stream from the first file found in the zip file is passed to the supplied block



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# File 'lib/io_streams/zip/reader.rb', line 22

def self.file(file_name, entry_file_name: nil)
  fin = Java::JavaIo::FileInputStream.new(file_name)
  zin = Java::JavaUtilZip::ZipInputStream.new(fin)

  get_entry(zin, entry_file_name) ||
    raise(Java::JavaUtilZip::ZipException, "File #{entry_file_name} not found within zip file.")

  yield(zin.to_io)
ensure
  zin&.close
  fin&.close
end

.get_entry(zin, entry_file_name) ⇒ Object 



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# File 'lib/io_streams/zip/reader.rb', line 35

def self.get_entry(zin, entry_file_name)
  if entry_file_name.nil?
    zin.get_next_entry
    return true
  end

  while entry = zin.get_next_entry
    return true if entry.name == entry_file_name
  end
  false
end