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@@ -7,7 +7,14 @@ require 'net/sftp/protocol/06/base'
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 module Net; module SFTP
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+  # The Protocol module contains the definitions for all supported SFTP
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+  # protocol versions.
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   module Protocol
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+
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+    # Instantiates and returns a new protocol driver instance for the given
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+    # protocol version. +session+ must be a valid SFTP session object, and
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+    # +version+ must be an integer. If an unsupported version is given,
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+    # an exception will be raised.
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     def self.load(session, version)
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       case version
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       when 1 then V01::Base.new(session)
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@@ -19,6 +26,7 @@ module Net; module SFTP
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       else raise NotImplementedError, "unsupported SFTP version #{version.inspect}"
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       end
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     end
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+
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   end
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 end; end
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