Class: WCID::ID

Inherits:
Object
  • Object
show all
Defined in:
lib/wcid/id.rb

Overview

A WCID::ID object is a single Identity record in WorldCat Identities.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(doc) ⇒ ID

Returns a new instance of ID.



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# File 'lib/wcid/id.rb', line 17

def initialize doc
  @record = doc.elements.to_a("searchRetrieveResponse/records/record")
  @identity = @record[0].elements['recordData/Identity']
  @pnkey = @identity.elements['pnkey'].text
  @lccn_record = @identity.elements['authorityInfo/lccn'].text
  @lccn = convert_lccn(@lccn_record)
  @identity = @record[0].elements['recordData/Identity'] 
  @type = @identity.attributes['type']
  @wiki_link = "http://en.wikipedia.org/wiki/#{(@identity.elements['authorityInfo/wikiLink']).text}" if @identity.elements['authorityInfo/wikiLink']
  @subfield_a = @identity.elements['authorityInfo/standardForm/suba'].text if @identity.elements['authorityInfo/standardForm/suba']
  @subfield_d = @identity.elements['authorityInfo/standardForm/subd'].text if @identity.elements['authorityInfo/standardForm/subd']
end

Instance Attribute Details

#lccn ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def lccn
  @lccn
end

#pnkey ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def pnkey
  @pnkey
end

#subfield_a ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def subfield_a
  @subfield_a
end

#subfield_d ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def subfield_d
  @subfield_d
end

#type ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def type
  @type
end

#wiki_link ⇒ Object (readonly)

lccn = Library of Congress Control Number type = wiki_link = link to Wikipedia for this identity subfield_a = name subfield_d = dates associated with the name pnkey = each WorldCat Identities record is given a unique pnkey made up

the name and associated dates (and qualifier?). A pnkey is the most exact way to 
search WorldCat Identities.



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# File 'lib/wcid/id.rb', line 16

def wiki_link
  @wiki_link
end

Instance Method Details

#convert_lccn(lccn) ⇒ Object

A method to convert the Library of Congress Control Number as represented in the WorldCat Identities database into an LCCN subtable for searching the Linked Authority File.



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# File 'lib/wcid/id.rb', line 34

def convert_lccn(lccn)
  lccn.gsub!(' ', '')
  ll = lccn.length
  if lccn[ll - 6, 1] != '0'
    lccn = lccn[0, ll - 6] + "-" + lccn[ll - 6, 99]
  elsif lccn[ll - 5, 1] != '0'
    lccn = lccn[0, ll - 6] + "-" + lccn[ll - 5, 99]
  elsif lccn[ll - 4, 1] != '0'
    lccn = lccn[0, ll - 6] + "-" + lccn[ll - 4, 99]
  elsif lccn[ll - 3, 1] != '0'
    lccn = lccn[0, ll - 6] + "-" + lccn[ll - 3, 99]
  end
  lccn
end

#get_lc_auth ⇒ Object

Returns a MARC::Record representation of the associated LC authority record.



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# File 'lib/wcid/id.rb', line 52

def get_lc_auth
  uri = URI.escape("http://errol.oclc.org/laf/#{self.lccn}.MarcXML")
  src = ''
  begin
    Timeout.timeout 20 do
      src = Net::HTTP.get(URI.parse("#{uri}"))
    end
    record = MARC::XMLReader.new(StringIO.new(string=src)).to_a[0]
  end
rescue Timeout::Error
  puts "The auth lookup timed out!"
  raise
rescue MARC::Exception => e
  puts "MARC exception: #{e}"
  raise
rescue REXML::ParseException
  puts "rexml error"
  raise
rescue EOFError
  puts "The service seems to be down!"
  raise "eof"
rescue Exception => e
  puts "some other type of exception"
  puts e
  raise
end