Class: Cpr::Field

Inherits:
Object
  • Object
show all
Defined in:
lib/cpr/field.rb

Direct Known Subclasses

AlphanumericField, NumericField

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, range, opts = {}) ⇒ Field

Returns a new instance of Field.



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# File 'lib/cpr/field.rb', line 5

def initialize(name, range, opts = {})
  @name = name
  @range = range
  @default = opts[:default]
end

Instance Attribute Details

#default ⇒ Object (readonly)

Returns the value of attribute default.



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# File 'lib/cpr/field.rb', line 4

def default
  @default
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/cpr/field.rb', line 4

def name
  @name
end

#range ⇒ Object (readonly)

Returns the value of attribute range.



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# File 'lib/cpr/field.rb', line 4

def range
  @range
end

Class Method Details

.create_type(type, *args) ⇒ Object 



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# File 'lib/cpr/field.rb', line 40

def self.create_type(type, *args)
  klass = case type
  when 'A' then AlphanumericField
  when 'N' then NumericField
  else raise "Invalid value for type '#{type}'"
  end
  klass.new(*args)
end

Instance Method Details

#fill ⇒ Object 



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# File 'lib/cpr/field.rb', line 20

def fill
  if @default != nil
    cast_for_write @default
  else
    " "*length
  end
end

#length ⇒ Object 



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# File 'lib/cpr/field.rb', line 28

def length
  @range.max - @range.begin + 1
end

#pattern ⇒ Object 



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# File 'lib/cpr/field.rb', line 32

def pattern
  if default
    cast_for_write(default)
  else
    typed_pattern
  end
end

#read(raw) ⇒ Object 



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# File 'lib/cpr/field.rb', line 11

def read(raw)
  cast_for_read(raw[range])
end

#write(raw, value) ⇒ Object 



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# File 'lib/cpr/field.rb', line 15

def write(raw, value)
  raw[range] = cast_for_write(value).encode(Encoding::ISO_8859_1, undef: :replace, invalid: :replace)[0...length]
  raw
end