| Module | OpenWFE::FilterMixin |
| In: |
lib/openwfe/expressions/filter.rb
|
This mixin adds filtering capabilities to a FlowExpression.
It‘s used by the ‘participant’ and ‘filter’ expressions.
| filter | [RW] |
Used when the workitem enters the ‘filtered zone’. Will replace the attributes of the workitem with filtered ones. Assumes the original workitem is kept under @applied_workitem.
# File lib/openwfe/expressions/filter.rb, line 61
61: def filter_in workitem, filter_attribute_name=:filter
62:
63: @filter = get_filter filter_attribute_name, workitem
64:
65: return unless @filter
66:
67: workitem.attributes = @filter.filter_in workitem.attributes
68: workitem.filter = @filter.dup
69: end
Prepares the workitem for leaving the ‘filtered zone’. Makes sure hidden and unwritable fields haven‘t been tampered with. Enforces the ‘add_ok’, ‘remove_ok’, ‘closed’ filter directives. Assumes the original workitem is kept under @applied_workitem.
# File lib/openwfe/expressions/filter.rb, line 77
77: def filter_out incoming_workitem
78:
79: return unless @filter
80:
81: incoming_workitem.filter = nil
82:
83: incoming_workitem.attributes = @filter.filter_out(
84: @applied_workitem.attributes, incoming_workitem.attributes)
85: end
Fetches the filter pointed at via the ‘filter’ attribute of the including expression class.
# File lib/openwfe/expressions/filter.rb, line 93
93: def get_filter filter_attribute_name, workitem
94:
95: filter_name = lookup_attribute filter_attribute_name, workitem
96:
97: return nil unless filter_name
98:
99: lookup_variable filter_name
100: end