Class: Words::Relation

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

Constant Summary collapse

RELATION_TO_SYMBOL = 
{ "-c" => :member_of_this_domain_topic, "+" => :derivationally_related_form, "%p" => :part_meronym, "~i" => :instance_hyponym, "@" => :hypernym,
";r" => :domain_of_synset_region, "!" => :antonym, "#p" => :part_holonym, "%s" => :substance_meronym, ";u" => :domain_of_synset_usage,
"-r" => :member_of_this_domain_region, "#s" => :substance_holonym, "=" => :attribute, "-u" => :member_of_this_domain_usage, ";c" => :domain_of_synset_topic,
"%m"=> :member_meronym, "~" => :hyponym, "@i" => :instance_hypernym, "#m" => :member_holonym, "$" => :verb_group, ">" => :cause, "*" => :entailment,
"\\" => :pertainym, "<" => :participle_of_verb, "&" => :similar_to, "^" => :see_also }
SYMBOL_TO_RELATION = 
RELATION_TO_SYMBOL.invert

Instance Method Summary collapse

Constructor Details

#initialize(relation_construct, source_synset, wordnet_connection) ⇒ Relation

Returns a new instance of Relation.



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# File 'lib/relation.rb', line 17

def initialize(relation_construct, source_synset, wordnet_connection)

    @wordnet_connection = wordnet_connection
    @symbol, @dest_synset_id, @pos, @source_dest = relation_construct.split('.')
    @dest_synset_id = @pos + @dest_synset_id
    @symbol = RELATION_TO_SYMBOL[@symbol]
    @source_synset = source_synset

end

Instance Method Details

#destination ⇒ Object 



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# File 'lib/relation.rb', line 66

def destination

    @destination ||= Synset.new(@dest_synset_id, @wordnet_connection, nil)

end

#destination_word ⇒ Object 



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# File 'lib/relation.rb', line 40

def destination_word

    return nil if is_semantic?
    @destination_word ||= destination.words[@source_dest[2..3].to_i(16)-1]

end

#inspect ⇒ Object 



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# File 'lib/relation.rb', line 82

def inspect

    { :symbol => @symbol, :dest_synset_id => @dest_synset_id, :pos => @pos, :source_dest => @source_dest }.inspect
     
end

#is_semantic? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/relation.rb', line 27

def is_semantic?

    @source_dest == "0000"

end

#relation_type ⇒ Object 



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# File 'lib/relation.rb', line 60

def relation_type

    @symbol

end

#relation_type?(type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/relation.rb', line 47

def relation_type?(type)

    case
    when SYMBOL_TO_RELATION.include?(type.to_sym)
	type.to_sym == @symbol
    when RELATION_TO_SYMBOL.include?(pos.to_s)
	POINTER_TO_SYMBOL[type.to_sym] == @symbol
    else
	false
    end

end

#source_word ⇒ Object 



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# File 'lib/relation.rb', line 33

def source_word

    return nil if is_semantic?
    @source_word ||= @source_synset.words[@source_dest[0..1].to_i(16)-1]

end

#to_s ⇒ Object 



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# File 'lib/relation.rb', line 72

def to_s

    if is_semantic?
	@to_s ||= "Semantic #{relation_type.to_s.gsub('_', ' ')} relation between #{@source_synset.synset_id} and #{@dest_synset_id}"
    else
	@to_s ||= "#{relation_type.to_s.gsub('_', ' ').capitalize} relation between #{@source_synset.synset_id}'s word \"#{source_word}\" and #{@dest_synset_id}'s word \"#{destination_word}\""
    end

end