Class: ScraperWiki::API::Matchers::FieldKeyMatcher

Inherits:
FieldMatcher show all
Defined in:
lib/scraperwiki-api/matchers.rb

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from ScraperWiki::API::Matchers::CustomMatcher

Instance Method Details

#difference(v) ⇒ Object

Raises:

  • (NotImplementerError) 


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# File 'lib/scraperwiki-api/matchers.rb', line 768

def difference(v)
  raise NotImplementerError, 'Subclasses must implement this method'
end

#failure_predicate ⇒ Object 



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# File 'lib/scraperwiki-api/matchers.rb', line 772

def failure_predicate
  "#{predicate}: #{difference.join ', '}"
end

#match?(v) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/scraperwiki-api/matchers.rb', line 751

def match?(v)
  w = Yajl::Parser.parse v
  if Hash === w
    difference(w).empty?
  elsif Array === w
    w.all? do |x|
      if Hash === x
        difference(x).empty?
      else
        raise NotImplementerError, 'Can only handle subfields that are hashes or arrays of hashes'
      end
    end
  else
    raise NotImplementerError, 'Can only handle subfields that are hashes or arrays of hashes'
  end
end

#negative_failure_predicate ⇒ Object 



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# File 'lib/scraperwiki-api/matchers.rb', line 776

def negative_failure_predicate
  "#{negative_predicate}: #{difference.join ', '}"
end