Class OpenWFE::RawExpression::Parameter
In: lib/openwfe/expressions/raw.rb
Parent: Object

Encapsulating 

    <parameter field="x" default="y" type="z" match="m" />

Somehow I have that : OpenWFEru is not a strongly typed language … Anyway I implemented that to please Pat.

Methods

check   check_match   enforce_type   new   to_s  

Public Class methods

new(field, match, default, type)

[Source]

     # File lib/openwfe/expressions/raw.rb, line 431
431:                 def initialize (field, match, default, type)
432: 
433:                     @field = to_s field
434:                     @match = to_s match
435:                     @default = to_s default
436:                     @type = to_s type
437:                 end

Public Instance methods

check(workitem)

Will raise an exception if this param requirement is not met by the workitem.

[Source]

     # File lib/openwfe/expressions/raw.rb, line 443
443:                 def check (workitem)
444: 
445:                     unless @field
446:                         raise \
447:                             OpenWFE::ParameterException,
448:                             "'parameter'/'param' without a 'field' attribute"
449:                     end
450: 
451:                     field_value = workitem.attributes[@field]
452:                     field_value = @default unless field_value
453: 
454:                     unless field_value
455:                         raise \
456:                             OpenWFE::ParameterException, 
457:                             "field '#{@field}' is missing" \
458:                     end
459: 
460:                     check_match(field_value)
461: 
462:                     enforce_type(workitem, field_value)
463:                 end

Protected Instance methods

check_match(value)

[Source]

     # File lib/openwfe/expressions/raw.rb, line 497
497:                     def check_match (value)
498: 
499:                         return unless @match
500: 
501:                         unless value.to_s.match(@match)
502:                             raise \
503:                                 OpenWFE::ParameterException,
504:                                 "value of field '#{@field}' doesn't match"
505:                         end
506:                     end
enforce_type(workitem, value)

Will raise an exception if it cannot coerce the type of the value to the one desired.

[Source]

     # File lib/openwfe/expressions/raw.rb, line 479
479:                     def enforce_type (workitem, value)
480: 
481:                         value = if not @type
482:                             value
483:                         elsif @type == "string"
484:                             value.to_s
485:                         elsif @type == "int" or @type == "integer"
486:                             Integer(value)
487:                         elsif @type == "float"
488:                             Float(value)
489:                         else
490:                             raise 
491:                                 "unknown type '#{@type}' for field '#{@field}'"
492:                         end
493: 
494:                         workitem.attributes[@field] = value
495:                     end
to_s(o)

Used in the constructor to flatten everything to strings.

[Source]

     # File lib/openwfe/expressions/raw.rb, line 470
470:                     def to_s (o)
471:                         return nil unless o
472:                         o.to_s
473:                     end

[Validate]