Class: EDI::E::Interchange

Inherits:
Object
  • Object
show all
Defined in:
lib/edi4r/edifact-rexml.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse_xml(xdoc) ⇒ Object

Returns a REXML document that represents the interchange

xdoc

REXML document that contains the XML representation of a UN/EDIFACT interchange



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# File 'lib/edi4r/edifact-rexml.rb', line 34

def Interchange.parse_xml( xdoc )
  _root = xdoc.root
  _header  = _root.elements["Header"]
  _trailer = _root.elements["Trailer"]
  _una  = _header.elements["Parameter[@name='UNA']"]
  _una = _una.text if _una
  raise "Empty UNA" if _una and _una.empty? # remove later!
  # S001: Works for both batch and interactive EDI:
  _s001 =  _header.elements["Segment/CDE[@name='S001']"]
  _version = _s001.elements["DE[@name='0002']"].text.to_i
  _charset = _s001.elements["DE[@name='0001']"].text
  params = { :charset => _charset, :version => _version }
  if _una
    params[:una_string] = _una
    params[:show_una] = true
  end
  ic = Interchange.new( params )
  if _root.elements["Message"].nil? # correct ??
    _root.elements.each('MsgGroup') do |xel|
      ic.add( MsgGroup.parse_xml( ic, xel ), false )
    end
  else
    _root.elements.each('Message') do |xel|
      ic.add( Message.parse_xml( ic, xel ), false )
    end
  end

  ic.header  = Segment.parse_xml( ic, _header.elements["Segment"] )
  ic.trailer = Segment.parse_xml( ic, _trailer.elements["Segment"] )
  ic.validate
  ic
end

.peek_xml(xdoc) ⇒ Object

Read maxlen bytes from $stdin (default) or from given stream (UN/EDIFACT data expected), and peek into first segment (UNB/UIB).

Returns an empty Interchange object with a properly header filled.

Intended use:

Efficient routing by reading just UNB data: sender/recipient/ref/test



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# File 'lib/edi4r/edifact-rexml.rb', line 76

def Interchange.peek_xml(xdoc) # Handle to REXML document
  _root = xdoc.root
  _header  = _root.elements["Header"]
  _trailer = _root.elements["Trailer"]
  _una  = _header.elements["Parameter[@name='UNA']"]
  _una = _una.text if _una
  raise "Empty UNA" if _una and _una.empty? # remove later!
  # S001: Works for both batch and interactive EDI:
  _s001 =  _header.elements["Segment/CDE[@name='S001']"]
  _version = _s001.elements["DE[@name='0002']"].text.to_i
  _charset = _s001.elements["DE[@name='0001']"].text
  params = { :charset => _charset, :version => _version }
  if _una
    params[:una_string] = _una
    params[:show_una] = true
  end
  ic = Interchange.new( params )

  ic.header  = Segment.parse_xml( ic, _header.elements["Segment"] )
  ic.trailer = Segment.parse_xml( ic, _trailer.elements["Segment"] )

  ic
end

Instance Method Details

#to_din16557_4(xdoc = REXML::Document.new) ⇒ Object

Returns a REXML document that represents the interchange according to DIN 16557-4



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# File 'lib/edi4r/edifact-rexml.rb', line 122

def to_din16557_4( xdoc = REXML::Document.new )
  externalID = "SYSTEM \"edifact.dtd\""
  doc_element_name = 'EDIFACTINTERCHANGE'
  xdoc << REXML::XMLDecl.new
  xdoc << REXML::DocType.new( doc_element_name, externalID )

  doc_el = REXML::Element.new( doc_element_name )
  xel  = REXML::Element.new( 'UNA' ) 
  xel.attributes["UNA1"]  = una.ce_sep.chr
  xel.attributes["UNA2"]  = una.de_sep.chr
  xel.attributes["UNA3"]  = una.decimal_sign.chr
  xel.attributes["UNA4"]  = una.esc_char.chr
  xel.attributes["UNA5"]  = una.rep_sep.chr
  xel.attributes["UNA6"]  = una.seg_term.chr
  xdoc.elements << doc_el
  doc_el.elements << xel

  super( xdoc.root )
  xdoc
end

#to_xml(xdoc = REXML::Document.new) ⇒ Object

Returns a REXML document that represents the interchange



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# File 'lib/edi4r/edifact-rexml.rb', line 104

def to_xml( xdoc = REXML::Document.new )
  rc = super
  # Add parameter(s) to header in rc[1]
  unless @una.nil? #@una.empty?
    xel = REXML::Element.new('Parameter')
    rc[1] << xel
    xel.attributes["name"] = 'UNA'
    xel.text = @una.to_s
  end
#      rc
  xdoc
end