Class: MARC::MARC4J

Inherits:
Object
  • Object
show all
Defined in:
lib/marc/marc4j.rb,
lib/marc/marc4j/version.rb

Constant Summary collapse

DEFAULT_JAR_RELATIVE_DIR = 
File.join(File.dirname(__FILE__), "../../ext/marc4j/lib")
VERSION =

ruby-marc-marc4j version

"1.0.0"

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ MARC4J

Get a new coverter



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# File 'lib/marc/marc4j.rb', line 10

def initialize(opts = {})
  @logger = opts.delete(:logger)
  @jardir = opts.delete(:jardir)
  load_marc4j(@jardir)
  @factory = org.marc4j.marc::MarcFactory.newInstance
end

Instance Method Details

#marc4j_to_rubymarc(marc4j) ⇒ Object

Given a marc4j record, return a rubymarc record



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# File 'lib/marc/marc4j.rb', line 20

def marc4j_to_rubymarc(marc4j)
  rmarc = MARC::Record.new
  rmarc.leader = marc4j.getLeader.marshal

  marc4j.getControlFields.each do |marc4j_control|
    rmarc.append( MARC::ControlField.new(marc4j_control.getTag(), marc4j_control.getData )  )
  end

  marc4j.getDataFields.each do |marc4j_data|
    rdata = MARC::DataField.new(  marc4j_data.getTag,  marc4j_data.getIndicator1.chr, marc4j_data.getIndicator2.chr )

    marc4j_data.getSubfields.each do |subfield|

      # We assume Marc21, skip corrupted data
      # if subfield.getCode is more than 255, subsequent .chr
      # would raise.
      if subfield.getCode > 255
        if @logger
          @logger.warn("Marc4JReader: Corrupted MARC data, record id #{marc4j.getControlNumber}, field #{marc4j_data.tag}, corrupt subfield code byte #{subfield.getCode}. Skipping subfield, but continuing with record.")
        end
        next
      end

      rsubfield = MARC::Subfield.new(subfield.getCode.chr, subfield.getData)
      rdata.append rsubfield
    end

    rmarc.append rdata
  end

  return rmarc
end

#rubymarc_to_marc4j(rmarc) ⇒ Object

Given a rubymarc record, return a marc4j record



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# File 'lib/marc/marc4j.rb', line 55

def rubymarc_to_marc4j(rmarc)
  marc4j = @factory.newRecord(rmarc.leader)
  rmarc.each do |f|
    if f.is_a? MARC::ControlField
      new_field = @factory.newControlField(f.tag, f.value)
    else
      new_field = @factory.new_data_field(f.tag, f.indicator1.ord, f.indicator2.ord)
      f.each do |sf|
        new_field.add_subfield(@factory.new_subfield(sf.code.ord, sf.value))
      end
    end
    marc4j.add_variable_field(new_field)
  end
  return marc4j
end