Module: XML::Smart

Defined in:
lib/xml/smart.rb,
lib/xml/smart_dom.rb,
lib/xml/smart_qname.rb,
lib/xml/smart_domtext.rb,
lib/xml/smart_domother.rb,
lib/xml/smart_domelement.rb,
lib/xml/smart_domnodeset.rb,
lib/xml/smart_domattribute.rb,
lib/xml/smart_domnamespace.rb,
lib/xml/smart_domattributeset.rb,
lib/xml/smart_domnamespaceset.rb,
lib/xml/smart_processinginstruction.rb

Defined Under Namespace

Classes: Dom, Error, ProcessingInstruction, QName

Constant Summary collapse

VERSION = 


LIBXML_VERSION =





MUTEX =



Mutex.new


COPY =



0


MOVE =



1





Class Method Summary
collapse





Instance Method Summary
collapse






Class Method Details





.modify(name, default = nil, &block) ⇒ Object













Raises:










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# File 'lib/xml/smart.rb', line 157

def self::modify(name,default=nil,&block)
  raise Error, 'first parameter has to be a filename or filehandle' unless name.is_a?(String) || name.is_a?(IO) || name.is_a?(Tempfile)
  raise Error, 'a block is mandatory' unless block_given?
  dom = io = nil
  begin
    if name.is_a?(String) && File.exists?(name)
      MUTEX.synchronize do
        io = ::Kernel::open(name,'r+')
        io.flock(File::LOCK_EX)
      end  
      dom = Dom.new Nokogiri::XML::parse(io){|config| config.noblanks.noent.nsclean.strict }, name
      io.rewind
    elsif name.is_a?(String) && !File.exists?(name)
      MUTEX.synchronize do
        io = ::Kernel::open(name,'w')
        io.flock(File::LOCK_EX)
      end  
      dom = Smart::string(default,name)
    elsif name.is_a?(IO) || name.is_a?(Tempfile)
      MUTEX.synchronize do
        io = name
        io.flock(File::LOCK_EX)
      end
      dom = Dom.new Nokogiri::XML::parse(io){|config| config.noblanks.noent.nsclean.strict }
      io.rewind
    end
    block.call(dom)
    dom.save_as(io)
  rescue => e
    puts e.message
    raise Error, "could not open #{name}"
  ensure
    if io
      io.flush
      io.truncate(io.pos)
      io.flock(File::LOCK_UN)
      io.close if name.is_a?(String)
    end
  end
  nil
end












.open(name, default = nil) ⇒ Object













Raises:










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# File 'lib/xml/smart.rb', line 199

def self::open(name,default=nil)
  raise Error, 'first parameter has to be a filename or filehandle' unless name.is_a?(String) || name.is_a?(IO) || name.is_a?(Tempfile)
  raise Error, 'second parameter has to be an xml string' unless default.is_a?(String) || default.nil?
  dom = Smart::open_unprotected(name,default,true)
  if dom && block_given?
    yield dom
    nil
  else  
    dom
  end
end












.open_unprotected(name, default = nil, lock = false) ⇒ Object













Raises:










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# File 'lib/xml/smart.rb', line 211

def self::open_unprotected(name,default=nil,lock=false)
  raise Error, 'first parameter has to be a filename or filehandle' unless name.is_a?(String) || name.is_a?(IO) || name.is_a?(Tempfile)
  raise Error, 'second parameter has to be an xml string' unless default.is_a?(String) || default.nil?
  dom = begin
    filename = nil
    io = if name.is_a?(String) 
      filename = name
      ::Kernel::open(name) 
    else
      filename = name.path
      name
    end
    begin
      io.flock(File::LOCK_EX) if lock
      Dom.new Nokogiri::XML::parse(io){|config| config.noblanks.noent.nsclean.strict }, filename
    ensure
      io.flock(File::LOCK_UN)
    end
  rescue => e
    if default.nil?
      puts e.message
      raise Error, "could not open #{name}"
    else
      Smart::string(default)
    end
  end
  if block_given?
    yield dom
    nil
  else  
    dom
  end
end












.string(str, basepath = nil) ⇒ Object













Raises:










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# File 'lib/xml/smart.rb', line 245

def self::string(str,basepath=nil)
  raise Error, 'first parameter has to be stringable (:to_s)' unless str.is_a?(String)
  dom = Dom.new Nokogiri::XML::parse(str.to_s){|config| config.noblanks.noent.nsclean.strict }, basepath
  if block_given?
    yield dom
    nil
  else  
    dom
  end
end













Instance Method Details





#initialize(name, default = nil) ⇒ Object










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# File 'lib/xml/smart.rb', line 155

def initialize(name,default=nil); open(name,default); end