Class: Sfp::Parameter

Inherits:
Object
  • Object
show all
Defined in:
lib/sfp/sas_translator.rb

Overview

A class for operator/axiom parameter (prevail or effect condition)  :pre = nil - it can be anything (translated to -1)  :post = nil - variable’s value doesn’t change

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(var, pre, post = nil) ⇒ Parameter

Returns a new instance of Parameter.



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# File 'lib/sfp/sas_translator.rb', line 2156

def initialize(var, pre, post=nil)
  @var = var
  @pre = pre
  @post = post
end

Instance Attribute Details

#post ⇒ Object

Returns the value of attribute post.



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# File 'lib/sfp/sas_translator.rb', line 2154

def post
  @post
end

#pre ⇒ Object

Returns the value of attribute pre.



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# File 'lib/sfp/sas_translator.rb', line 2154

def pre
  @pre
end

#var ⇒ Object

Returns the value of attribute var.



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# File 'lib/sfp/sas_translator.rb', line 2154

def var
  @var
end

Instance Method Details

#clone ⇒ Object 



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# File 'lib/sfp/sas_translator.rb', line 2170

def clone
  return Parameter.new(@var, @pre, @post)
end

#dump(stream, root, variables, is_prevail = true) ⇒ Object

Raises:



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# File 'lib/sfp/sas_translator.rb', line 2197

def dump(stream, root, variables, is_prevail=true)
  ### resolve reference
  pre = ((@pre.is_a?(String) and @pre.isref) ? variables[@pre.to_sym].init : @pre)
  ### calculate index
  if pre.is_a?(Hash) and pre.isnull
    pre = 0
  elsif pre.nil?
    pre = -1
  else
    pre = @var.index(pre)
  end

  line = nil
  if is_prevail
    line = "#{@var.id} #{pre}\n"
  else
    ### resolve reference
    post = ((@post.is_a?(String) and @post.isref) ? variables[@post.to_sym].init : @post)
    ### calculate index
    if post.is_a?(Hash) and post.isnull
      line = "0 #{@var.id} #{pre} 0\n"
    else
      line = "0 #{@var.id} #{pre} #{@var.index(post)}\n"
    end
  end

  raise TranslationException if line[-2] == ' '
  stream.write line
end

#effect? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sfp/sas_translator.rb', line 2166

def effect?
  return (@post != nil)
end

#prevail? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sfp/sas_translator.rb', line 2162

def prevail?
  return (@post == nil)
end

#to_s ⇒ Object 



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# File 'lib/sfp/sas_translator.rb', line 2227

def to_s
  return @var.name + ',' +
    (@pre == nil ? '-' : (@pre.is_a?(Hash) ? @pre.tostring : @pre.to_s)) + ',' +
    (@post == nil ? '-' : (@post.is_a?(Hash) ? @post.tostring : @post.to_s))
end

#to_sas(root, variables, is_prevail = true) ⇒ Object 



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# File 'lib/sfp/sas_translator.rb', line 2174

def to_sas(root, variables, is_prevail=true)
  ### resolve reference
  pre = ((@pre.is_a?(String) and @pre.isref) ? variables[@pre.to_sym].init : @pre)
  ### calculate index
  if pre.is_a?(Hash) and pre.isnull
    pre = 0
  elsif pre.nil?
    pre = -1
  else
    pre = @var.index(pre)
  end
  return "#{@var.id} #{pre}" if is_prevail

  ### resolve reference
  post = ((@post.is_a?(String) and @post.isref) ? variables[@post.to_sym].init : @post)
  ### calculate index
  if post.is_a?(Hash) and post.isnull
    "0 #{@var.id} #{pre} 0"
  else
    "0 #{@var.id} #{pre} #{@var.index(post)}"
  end
end

#to_sfw ⇒ Object 



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# File 'lib/sfp/sas_translator.rb', line 2233

def to_sfw
  pre = @pre
  pre = @pre.ref if @pre.is_a?(Hash) and @pre.isobject
  pre = Sfp::Null.new if @pre.is_a?(Hash) and @pre.isnull

  post = @post
  post = @post.ref if @post.is_a?(Hash) and @post.isobject
  post = Sfp::Null.new if @post.is_a?(Hash) and @post.isnull

  return {
      'name' => @var.name,
      'pre' => pre,
      'post' => post
    }
end