Module: XMLCodec::XMLUtils

Defined in:
lib/XMLUtils.rb

Class Method Summary collapse

Class Method Details

.count_elements(path, filename) ⇒ Object

Count the number of elements that correspond to a given xpath in a file.



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# File 'lib/XMLUtils.rb', line 17

def self.count_elements(path, filename)
  getdoc(filename).xpath(path).size
end

.create_close_tag(name) ⇒ Object

Create a close tag.



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# File 'lib/XMLUtils.rb', line 47

def self.create_close_tag(name)
  "</"+name.to_s+">"
end

.create_open_tag(name, attrs) ⇒ Object

Create an open tag.



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# File 'lib/XMLUtils.rb', line 39

def self.create_open_tag(name, attrs)
  str = "<"+name
  attrs.each {|name, value| str << " #{name}='#{value}'"}
  str << ">"
  str
end

.element_exists(path, filename) ⇒ Object

Test if a given xpath exists in the file.



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# File 'lib/XMLUtils.rb', line 22

def self.element_exists(path, filename)
  count_elements(path,filename)>0
end

.escape_xml(string) ⇒ Object

Escape a string so that it can be included in a XML document



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# File 'lib/XMLUtils.rb', line 52

def self.escape_xml(string)
  Nokogiri::XML::Text.new(string, Nokogiri::XML::Document.new).to_s
end

.getdoc(filename) ⇒ Object

Gets the Nokogiri DOM for a given filename that must be a XML file.



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# File 'lib/XMLUtils.rb', line 12

def self.getdoc(filename)
  Nokogiri::XML::Document.parse File.new(filename, 'r')
end

.select_path(path, filename) ⇒ Object

Get a xpath from a file.



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# File 'lib/XMLUtils.rb', line 34

def self.select_path(path, filename)
  select_path_doc(path, getdoc(filename))
end

.select_path_doc(path, doc) ⇒ Object

Get a xpath from a Nokogiri::XML::Document.



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# File 'lib/XMLUtils.rb', line 27

def self.select_path_doc(path, doc)
  els = doc.xpath(path)
  return "" if !els[0]
  els[0].children.to_s
end