Class: MARC::Spec::Queries::Subfield

Inherits:
Object
  • Object
show all
Includes:
Selector
Defined in:
lib/marc/spec/queries/subfield.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Applicable

#apply

Methods included from Part

#eql?, #hash, #inspect

Constructor Details

#initialize(code, index: nil) ⇒ Subfield

Initializer



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# File 'lib/marc/spec/queries/subfield.rb', line 18

def initialize(code, index: nil)
  @code = parse_code(code)
  @index = ensure_type(index, PositionOrRange, allow_nil: true)
end

Instance Attribute Details

#code ⇒ Object (readonly)

Attributes



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# File 'lib/marc/spec/queries/subfield.rb', line 13

def code
  @code
end

#index ⇒ Object (readonly)

Attributes



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# File 'lib/marc/spec/queries/subfield.rb', line 13

def index
  @index
end

Instance Method Details

#can_apply?(marc_obj) ⇒ Boolean

Applicable

Returns:

  • (Boolean) 


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# File 'lib/marc/spec/queries/subfield.rb', line 37

def can_apply?(marc_obj)
  marc_obj.respond_to?(:subfields)
end

#to_s ⇒ Object

Object overrides



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# File 'lib/marc/spec/queries/subfield.rb', line 26

def to_s
  StringIO.new.tap do |out|
    out << '$'
    out << code
    out << "[#{index}]" if index
  end.string
end