Module: VtdXml::Navigation

Included in:
Document, Node
Defined in:
lib/vtd_xml/document.rb

Instance Method Summary collapse

Instance Method Details

#clear_xpath_namespaces ⇒ Object 



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# File 'lib/vtd_xml/document.rb', line 38

def clear_xpath_namespaces
  begin
    @pilot.clear_xpath_name_spaces()
  rescue NullPointerException
  end
end

#register_namespaces(namespaces) ⇒ Object 



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# File 'lib/vtd_xml/document.rb', line 33

def register_namespaces(namespaces)
  namespaces.each do |prefix, url|
    @pilot.declare_xpath_name_space(prefix.to_s, url.to_s)
  end
end

#search(xpath) ⇒ Object 



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# File 'lib/vtd_xml/document.rb', line 7

def search(xpath)
  @pilot.select_xpath(xpath)

  results = []
  while (result = @pilot.eval_xpath()) != -1
    results << Node.new(result, @navigator, @pilot, @modifier)
  end

  results
end

#xpath(*xpaths) ⇒ Object 



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# File 'lib/vtd_xml/document.rb', line 18

def xpath(*xpaths)
  namespaces = Hash === xpaths.last ? xpaths.pop : {}
  register_namespaces(namespaces)

  results = xpaths.map { |xpath| search(xpath) }
  results.flatten!
  results.compact!
  results

rescue XPathParseException => e
  raise XPathError, '%s for xpath: %s' % [e.message, xpaths.inspect]
ensure
  clear_xpath_namespaces
end