module XML::XXPath::Accessors::UnspecifiednessSupport

we need a boolean “unspecified?” attribute for XML nodes – paths like “*” oder (somewhen) “foo|bar” create “unspecified” nodes that the user must then “specify” by setting their text etc. (or manually setting unspecified=false)

This is mixed into the REXML::Element and XML::XXPath::Accessors::Attribute classes.

Public Class Methods

append_features(base) click to toggle source

Calls superclass method

# File lib/xml/rexml_ext.rb, line 28
def self.append_features(base)
  return if base.included_modules.include? self # avoid aliasing methods more than once
                                                # (would lead to infinite recursion)
  super
  base.module_eval <<-EOS
    alias_method :_text_orig, :text
    alias_method :_textis_orig, :text=
    def text
      # we're suffering from the "fragile base class"
      # phenomenon here -- we don't know whether the
      # implementation of the class we get mixed into always
      # calls text (instead of just accessing @text or so)
      if unspecified?
        "[UNSPECIFIED]"
      else
        _text_orig
      end
    end
    def text=(x)
      _textis_orig(x)
      self.unspecified=false
    end

    alias_method :_nameis_orig, :name=
    def name=(x)
      _nameis_orig(x)
      self.unspecified=false
    end
  EOS
end

Public Instance Methods

unspecified=(x) click to toggle source

# File lib/xml/rexml_ext.rb, line 24
def unspecified=(x)
  @xml_xpath_unspecified = x
end

unspecified?() click to toggle source

# File lib/xml/rexml_ext.rb, line 20
def unspecified?
  @xml_xpath_unspecified ||= false
end