Class: Pdfrb::Model::Reference

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/pdfrb/model/reference.rb

Overview

A pointer to an indirect object (s7.3.10). Value-equal by (oid, gen) so it can be a Hash key. Stored inside dictionaries/arrays wherever an indirect reference appears in source.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(oid, gen = 0) ⇒ Reference

Returns a new instance of Reference.



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# File 'lib/pdfrb/model/reference.rb', line 13

def initialize(oid, gen = 0)
  @oid = oid.to_i
  @gen = gen.to_i
  freeze
end

Instance Attribute Details

#gen ⇒ Object (readonly)

Returns the value of attribute gen.



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# File 'lib/pdfrb/model/reference.rb', line 11

def gen
  @gen
end

#oid ⇒ Object (readonly)

Returns the value of attribute oid.



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# File 'lib/pdfrb/model/reference.rb', line 11

def oid
  @oid
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/pdfrb/model/reference.rb', line 19

def <=>(other)
  return nil unless other.is_a?(Reference)

  [oid, gen] <=> [other.oid, other.gen]
end

#deref(document) ⇒ Object

Resolve via the document's object reader. Returns an Object.



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# File 'lib/pdfrb/model/reference.rb', line 44

def deref(document)
  document.object(self)
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/pdfrb/model/reference.rb', line 29

def eql?(other)
  other.is_a?(Reference) && oid == other.oid && gen == other.gen
end

#hash ⇒ Object 



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# File 'lib/pdfrb/model/reference.rb', line 25

def hash
  [oid, gen].hash
end

#inspect ⇒ Object 



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# File 'lib/pdfrb/model/reference.rb', line 39

def inspect
  "#<Pdfrb::Model::Reference oid=#{oid} gen=#{gen}>"
end

#to_s ⇒ Object 



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# File 'lib/pdfrb/model/reference.rb', line 35

def to_s
  "#{oid} #{gen} R"
end