Class: Atom::CoreElement

Inherits:
RootElement show all
Defined in:
lib/atomutil.rb

Direct Known Subclasses

Entry, Feed

Instance Attribute Summary

Attributes inherited from Element

#elem

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Element

#add, element_attr_accessor, element_attr_accessors, element_datetime_accessor, element_datetime_accessors, element_name, element_ns, element_object_list_accessor, element_text_accessor, element_text_accessors, element_text_list_accessor, #get, #get_attr, #get_object, #get_objects, #getlist, new, ns, #set, #set_attr, #to_s

Constructor Details

#initialize(params = {}) ⇒ CoreElement

Returns a new instance of CoreElement.



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# File 'lib/atomutil.rb', line 903

def initialize(params={})
  if params.has_key?(:uri) || params.has_key?(:file)
    target = params.has_key?(:uri)         ? URI.parse(params.delete(:uri)) \
           : params[:file].is_a?(Pathname) ? params.delete(:file) \
           :                                 Pathname.new(params.delete(:file))
    params[:stream] = target.open { |f| f.read }
  end
  super(params)
end

Class Method Details



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# File 'lib/atomutil.rb', line 846

def self.element_link_accessor(type)
  type = type.to_s
  meth_name = [type.tr('-','_'), 'link'].join('_')
  class_eval(<<-EOS, __FILE__, __LINE__)

    def #{meth_name}
      selected = links.select{ |l| l.rel == '#{type}' }
      selected.empty? ? nil : selected.first.href
    end

    def #{meth_name}s
      links.select{ |l| l.rel == '#{type}' }.collect{ |l| l.href }
    end

    def add_#{meth_name}(href)
      l = Link.new
      l.href = href
      l.rel = '#{type}'
      add_link l
    end

    def #{meth_name}=(href)
      xpath = child_xpath(Namespace::ATOM, 'link', { :rel => '#{type}' })
      @elem.elements.delete_all(xpath)
      add_#{meth_name}(href)
    end
  EOS
end

.element_link_accessors(*types) ⇒ Object 



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# File 'lib/atomutil.rb', line 875

def self.element_link_accessors(*types)
  types.flatten.each{ |type| element_link_accessor(type) }
end

Instance Method Details



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# File 'lib/atomutil.rb', line 890

def add_alternate_link(href)
  l = Link.new
  l.href = href
  l.rel = 'alternate'
  add_link l
end

#alternate_link ⇒ Object 



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# File 'lib/atomutil.rb', line 885

def alternate_link
  alternates = links.select{ |l| l.rel.nil? || l.rel == 'alternate' }
  alternates.empty? ? nil : alternates.first.href
end

#alternate_link=(href) ⇒ Object 



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# File 'lib/atomutil.rb', line 897

def alternate_link=(href)
  xpath = child_xpath(Namespace::ATOM, 'link', { :rel => 'alternate' })
  @elem.elements.delete_all(xpath)
  add_alternate_link(href)
end

#alternate_links ⇒ Object 



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# File 'lib/atomutil.rb', line 881

def alternate_links
  links.select{ |l| l.rel.nil? || l.rel == 'alternate' }.collect{ |l| l.href }
end