Class: SAPNW::RFC::Parameter

Inherits:
Parameters::Base show all
Defined in:
lib/sapnwrfc/parameters.rb

Overview

Base class for all Parameter types

Direct Known Subclasses

Changing, Export, Import, Table

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*parms) ⇒ Parameter

constructor called only from the SAPNW::RFC::Connector#discover process def initialize(funcdesc, name, type, len, ulen, decimals)



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# File 'lib/sapnwrfc/parameters.rb', line 90

def initialize(*parms)
  parms = parms.first if parms.class == Array and parms.first.class == Hash
  case parms
    when Array
      # this way happens when the interface of the parameter has been discover()ed
      funcdesc, name, type, len, ulen, decimals, typedef = parms
    when Hash
      # This way happens when a parameter is being manually constructed
      raise "Missing parameter :name => #{parms.inspect}\n" unless parms.has_key?(:name)
      raise "Missing parameter :type => #{parms.inspect}\n" unless parms.has_key?(:type)
      case parms[:type]
        when SAPNW::RFC::CHAR, SAPNW::RFC::DATE, SAPNW::RFC::BCD, SAPNW::RFC::TIME, SAPNW::RFC::BYTE, SAPNW::RFC::TABLE, SAPNW::RFC::NUM, SAPNW::RFC::FLOAT, SAPNW::RFC::INT, SAPNW::RFC::INT2, SAPNW::RFC::INT1, SAPNW::RFC::NULL, SAPNW::RFC::STRUCTURE, SAPNW::RFC::DECF16, SAPNW::RFC::DECF34, SAPNW::RFC::XMLDATA, SAPNW::RFC::STRING, SAPNW::RFC::XSTRING, SAPNW::RFC::EXCEPTION
        else
          if parms[:type].class == SAPNW::RFC::Type
            parms[:typedef] = parms[:type]
            parms[:type] = parms[:typedef].type
            raise "Parameter type (#{self.class}) does not match Type type (#{parms[:typedef].inspect})\n" if self.class == SAPNW::RFC::Table and parms[:type] != SAPNW::RFC::TABLE
          else
            raise "Invalid SAPNW::RFC* type supplied (#{parms[:type]})\n"
          end
      end
      funcdesc = nil
      len = 0
      ulen = 0
      decimals = 0
      name = parms[:name]
      type = parms[:type]
      typedef = parms[:typedef] if parms.has_key?(:typedef)
      len = parms[:len] if parms.has_key?(:len)
      ulen = parms[:ulen] if parms.has_key?(:ulen)
      decimals = parms[:decimals] if parms.has_key?(:decimals)
    else
      raise "invalid parameters: #{parms.inspect}\n"
  end
  @function_descriptor = funcdesc
  @name = name
  @type = type
  @typedef = typedef
  @len = len
  @ulen = ulen
  @decimals = decimals
  @value = nil
  #$stderr.print "initilised parameter(#{@name}): #{self.inspect}\n"
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(methid, *rest, &block) ⇒ Object

method_missing is used to pass on any method call to a parameter to the underlying native Ruby data type



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# File 'lib/sapnwrfc/parameters.rb', line 137

def method_missing(methid, *rest, &block)
  meth = methid.id2name
  #$stderr.print "method_missing: #{meth}\n"
  #$stderr.print "parameters: #{@parameters.keys.inspect}\n"
  if block
    @value.send(meth, &block)
  else
    #$stderr.print "Export method_missing - no block: #{meth}\n"
    @value.send(meth, *rest)
  end
end

Instance Attribute Details

#decimals ⇒ Object (readonly)

Returns the value of attribute decimals.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def decimals
  @decimals
end

#direction ⇒ Object (readonly)

Returns the value of attribute direction.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def direction
  @direction
end

#len ⇒ Object (readonly)

Returns the value of attribute len.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def len
  @len
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def name
  @name
end

#typdef ⇒ Object (readonly)

Returns the value of attribute typdef.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def typdef
  @typdef
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def type
  @type
end

#ulen ⇒ Object (readonly)

Returns the value of attribute ulen.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def ulen
  @ulen
end

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/sapnwrfc/parameters.rb', line 86

def value
  @value
end