Class: HappyMapper::Element

Inherits:
Item
  • Object
show all
Defined in:
lib/happymapper/element.rb

Instance Attribute Summary

Attributes inherited from Item

#name, #namespace, #options, #tag, #type

Instance Method Summary collapse

Methods inherited from Item

#constant, #from_xml_node, #initialize, #method_name, #typecast, #xpath

Constructor Details

This class inherits a constructor from HappyMapper::Item

Instance Method Details

#find(node, namespace, xpath_options) ⇒ Object


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# File 'lib/happymapper/element.rb', line 5

def find(node, namespace, xpath_options)
  if self.namespace
    # from the class definition
    namespace = self.namespace
  elsif options[:namespace]
    namespace = options[:namespace]
  end

  if options[:single]
    result = if options[:xpath]
               node.xpath(options[:xpath], xpath_options)
             else
               node.xpath(xpath(namespace), xpath_options)
             end

    if result
      value = yield(result.first)
      handle_attributes_option(result, value, xpath_options)
      value
    end
  else
    target_path = options[:xpath] ? options[:xpath] : xpath(namespace)
    node.xpath(target_path, xpath_options).collect do |item|
      value = yield(item)
      handle_attributes_option(item, value, xpath_options)
      value
    end
  end
end

#handle_attributes_option(result, value, xpath_options) ⇒ Object


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# File 'lib/happymapper/element.rb', line 35

def handle_attributes_option(result, value, xpath_options)
  return unless options[:attributes].is_a?(Hash)
  result = result.first unless result.respond_to?(:attribute_nodes)
  return unless result.respond_to?(:attribute_nodes)

  result.attribute_nodes.each do |xml_attribute|
    next unless (attribute_options = options[:attributes][xml_attribute.name.to_sym])
    attribute_value = Attribute.new(xml_attribute.name.to_sym, *attribute_options).
                      from_xml_node(result, namespace, xpath_options)

    method_name = xml_attribute.name.tr('-', '_')
    value.define_singleton_method(method_name) { attribute_value }
  end
end