Class: Mrt::Ingest::Component

Inherits:
Object
  • Object
show all
Defined in:
lib/mrt/ingest/component.rb

Overview

Represents a component of an object to ingest. Either a #URI or a #File.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(server, location, options) ⇒ Component

Returns a new instance of Component.



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# File 'lib/mrt/ingest/component.rb', line 11

def initialize(server, location, options)
  @server = server
  @name = options[:name]
  @digest = options[:digest]
  @mime_type = options[:mime_type]
  @size = options[:size]

  init_uri(location)
end

Instance Attribute Details

#server ⇒ Object (readonly)

:nodoc:



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# File 'lib/mrt/ingest/component.rb', line 9

def server
  @server
end

#uri ⇒ Object (readonly)

:nodoc:



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# File 'lib/mrt/ingest/component.rb', line 9

def uri
  @uri
end

Class Method Details

.from_erc(server, erc) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/mrt/ingest/component.rb', line 22

def from_erc(server, erc)
  return Component.new(server, erc, name: 'mrt-erc.txt') if erc.is_a?(URI) || erc.is_a?(File)
  return from_hash(server, erc) if erc.is_a?(Hash)

  raise ArgumentError, 'Bad ERC supplied: must be a URI, File, or Hash'
end

.from_hash(server, erc_h) ⇒ Object 



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# File 'lib/mrt/ingest/component.rb', line 29

def from_hash(server, erc_h)
  uri_str, path = server.add_file do |f|
    f.write("erc:\n")
    erc_h.each_pair { |k, v| f.write("#{k}: #{v}\n") }
  end

  digest = Mrt::Ingest::MessageDigest::MD5.from_file(File.new(path))
  Component.new(server, URI.parse(uri_str), name: 'mrt-erc.txt', digest: digest)
end

Instance Method Details

#digest_type ⇒ Object 



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# File 'lib/mrt/ingest/component.rb', line 44

def digest_type
  @digest && @digest.type
end

#digest_value ⇒ Object 



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# File 'lib/mrt/ingest/component.rb', line 48

def digest_value
  @digest && @digest.value
end

#to_manifest_entry ⇒ Object 



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# File 'lib/mrt/ingest/component.rb', line 40

def to_manifest_entry
  "#{@uri} | #{digest_type} | #{digest_value} | #{@size} | | #{@name} | #{@mime_type}\n"
end