Module: GrumpyMapper::ClassMethods

Defined in:
lib/grumpymapper.rb

Instance Method Summary collapse

Instance Method Details

#has_many(name, xpath, klass) ⇒ Object 



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# File 'lib/grumpymapper.rb', line 39

def has_many(name, xpath, klass)
  attr_accessor name
  @attributes[name] = Property::new(xpath, klass, true, [])
end

#has_one(name, xpath, klass, default = nil) ⇒ Object 



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# File 'lib/grumpymapper.rb', line 23

def has_one(name, xpath, klass, default=nil)
  attr_accessor name
  if default.nil?
    default = if klass.eql?(String)
      ""
    elsif klass.eql?(Integer)
      0
    elsif klass.eql?(Float)
      0.0
    else
      nil
    end
  end
  @attributes[name] = Property::new(xpath, klass, false, default)
end

#parse(xml) ⇒ Object 



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# File 'lib/grumpymapper.rb', line 44

def parse(xml)
  result = []
  Nokogiri::XML(xml).xpath(@tag).each do |tag|
    entity = new
    @attributes.each do |key,property|
      matches = tag.xpath(property.xpath)
      if matches.size > 0
        matches = if property.klass.eql?(Integer)
          matches.map(&:text).map(&:to_i)
        elsif property.klass.eql?(Float)
          matches.map(&:text).map(&:to_f)
        elsif property.klass.eql?(Boolean)
          matches.map(&:text).map do |m|
            %w(true t 1).include?(m) ? true : false
          end
        elsif property.klass.eql?(Date)
          matches.map(&:text).map do |m|
            Date::parse(m)
          end
        elsif property.klass.eql?(DateTime)
          matches.map(&:text).map do |m|
            DateTime::parse(m)
          end          
        elsif property.klass.eql?(String)
          matches.map(&:text)
        else
          matches.map do |m|
            property.klass.parse(m.to_s).first
          end
        end
        if property.multi
          entity.send(:"#{key}=", matches)
        else
          entity.send(:"#{key}=", matches.first)
        end
      else
        entity.send(:"#{key}=", property.default)
      end # if matches.size > 0
    end # @attributes.each
    result << entity
  end # each tag
  return result
end

#tag(xpath) ⇒ Object 



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# File 'lib/grumpymapper.rb', line 19

def tag(xpath)
  @tag = xpath
end