Method: XML::DOM::Element#getDigest

Defined in:
lib/xml/dom/digest.rb

#getDigest(force = false) ⇒ Object 



64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
 
# File 'lib/xml/dom/digest.rb', line 64

def getDigest(force = false)
  return @digest if (!force && @digest)
  attr = attributes
  children = childNodes
  attr_digests = ""
  children_digests = ""
  if attr
    attr_array = attr.sort {|a, b|
      DOM.tou16(a.nodeName) <=> DOM.tou16(b.nodeName)}
    attr_array.each {|a|
      attr_digests << a.getDigest(force)
    }
  end
  children_num = 0
  children.each {|c|
    next if c.nodeType == COMMENT_NODE
    children_num += 1
    children_digests << c.getDigest(force)
  }
  @digest = MD5.new([ELEMENT_NODE].pack("N") +
                    DOM.tou16(nodeName) +
                    "\0\0" +
                    [attr.length].pack("N") +
                    attr_digests +
                    [children_num].pack("N") +
                    children_digests).digest
end