Module: Serialize

Defined in:
lib/simple_mapper/support/bliss_serializer.rb

Constant Summary collapse

XML_OPTIONS = 
{
  :include_key => false, # Can be false, :element, or :attribute
  :report_nil => true, # Sets an attribute nil="true" on elements that are nil, so that the reader doesn't read as an empty string
  :key_name => :id, # Default key name
  :instance_columns => :visible_properties,
  :class_columns => :visible_properties,
  :default_root => 'xml',
}

Class Method Summary collapse

Class Method Details

.hash_from_xml(xml, options = {}) ⇒ Object 



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# File 'lib/simple_mapper/support/bliss_serializer.rb', line 61

def self.hash_from_xml(xml,options={})
  xml.formatted(:xml).to_hash
end

.object_to_xml(obj, options = {}) ⇒ Object 



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# File 'lib/simple_mapper/support/bliss_serializer.rb', line 17

def self.object_to_xml(obj, options={})
  # Automatically set the key_name for DataMapper objects
  options.merge!(:key_name => obj.class.table.key.name) if obj.class.respond_to?(:table) && obj.class.respond_to?(:persistent?) && obj.class.persistent?
  # Should do the above also for ActiveRecord...
  options = options.reverse_merge!(obj.class.xml_options) if obj.class.respond_to?(:xml_options)
  options = options.reverse_merge!(obj.xml_options) if obj.respond_to?(:xml_options)
  to_xml(obj.to_hash(options), {:root => Inflector.underscore(obj.class.name)}.merge(options))
end

.to_xml(attributes = {}, options = {}) ⇒ Object 



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# File 'lib/simple_mapper/support/bliss_serializer.rb', line 25

def self.to_xml(attributes={}, options={})
  options = XML_OPTIONS.merge(options)
  root = options[:root]
  options[:exclude] = [options[:exclude]].flatten.compact.collect {|e| e.to_s}
  attributes.reject! {|k,v| options[:exclude].include?(k)}

  doc = REXML::Document.new
  root_element = doc.add_element(root || 'xml')

  case options[:include_key]
  when :attribute
    root_element.add_attribute(options[:key_name].to_s, attributes.delete(options[:key_name].to_s).to_s).extended do
      def self.to_string; %Q[#@expanded_name="#{to_s().gsub(/"/, '"')}"] end
    end
  when :element
    root_element.add_element(options[:key_name].to_s) << REXML::Text.new(attributes.delete(options[:key_name].to_s).to_s)
  end

  attributes.each do |key,value|
    if value.nil?
      node = root_element.add_element(key.to_s)
      node.add_attribute('nil', 'true') if options[:report_nil]
    else
      if value.respond_to?(:to_xml)
        assoc_options = {}
        assoc_options = {:exclude => value.association.foreign_key_column.name} if value.respond_to?(:association)
        root_element.add_element(REXML::Document.new(value.to_xml(assoc_options.merge(:root => key)).to_s))
      else
        root_element.add_element(key.to_s) << REXML::Text.new(value.to_s.dup)
      end
    end
  end

  root ? doc.to_s : doc.children[0].children.to_s
end