Class: XML::Mapping::ObjectNode

Inherits:
SubObjectBaseNode show all
Defined in:
lib/xml/mapping/standard_nodes.rb

Overview

Node factory function synopsis:

object_node :_attrname_, _path_ [, :default_value=>_obj_]
                                [, :optional=>true]
                                [, :class=>_c_]
                                [, :marshaller=>_proc_]
                                [, :unmarshaller=>_proc_]

Node that maps a subtree in the source XML to a Ruby object. :attrname and path are again the attribute name resp. XPath expression of the mapped attribute; the keyword arguments :default_value and :optional are handled by the SingleAttributeNode superclass. The XML subnode named by path is mapped to the attribute named by :attrname according to the keyword arguments :class, :marshaller, and :unmarshaller, which are handled by the SubObjectBaseNode superclass.

Instance Method Summary collapse

Methods inherited from SingleAttributeNode

#default_when_xpath_err, #initialize, #obj_initializing, #obj_to_xml, #xml_to_obj

Methods inherited from Node

#initialize, #obj_initializing, #obj_to_xml, #xml_to_obj

Constructor Details

This class inherits a constructor from XML::Mapping::SingleAttributeNode

Instance Method Details

#extract_attr_value(xml) ⇒ Object

:nodoc:



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# File 'lib/xml/mapping/standard_nodes.rb', line 147

def extract_attr_value(xml) # :nodoc:
  @options[:unmarshaller].call(default_when_xpath_err{@path.first(xml)})
end

#initialize_impl(path) ⇒ Object

Initializer. path (a string denoting an XPath expression) is the location of the subtree.



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# File 'lib/xml/mapping/standard_nodes.rb', line 143

def initialize_impl(path)
  super
	@path = XML::XXPath.new(path)
end

#set_attr_value(xml, value) ⇒ Object

:nodoc:



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# File 'lib/xml/mapping/standard_nodes.rb', line 150

def set_attr_value(xml, value) # :nodoc:
  @options[:marshaller].call(@path.first(xml,:ensure_created=>true), value)
end