Class: Hollerith
- Inherits:
-
Object
show all
- Defined in:
- lib/hollerith.rb
Defined Under Namespace
Classes: ArgumentDecoder, FunctionRunner, SystemFunctions, ValueGetter
Constant Summary
collapse
- HOOKS =
%w(
on_place_order
on_update_order
)
Instance Method Summary
collapse
Constructor Details
#initialize(configuration, main_context = {}) ⇒ Hollerith
Returns a new instance of Hollerith.
8
9
10
11
12
13
|
# File 'lib/hollerith.rb', line 8
def initialize configuration, main_context = {}
@configuration = configuration
@main_context = main_context
@user_context = @configuration['configuration'] || {}
@user_defined_functions = @configuration['custom_functions']
end
|
Instance Method Details
#evaluate_conditional(conditional_statement) ⇒ Object
99
100
101
102
103
|
# File 'lib/hollerith.rb', line 99
def evaluate_conditional conditional_statement
return false unless conditional_statement
evaluate_function(conditional_statement)
end
|
#evaluate_function(function_definition) ⇒ Object
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
# File 'lib/hollerith.rb', line 105
def evaluate_function function_definition
return unless function_definition
runner = Hollerith::FunctionRunner.new(
function_definition,
@main_context,
@user_context,
@user_defined_functions
)
results = runner.evaluate
if runner.user_context_change
@user_context.deep_merge!(runner.user_context_change)
end
return results
end
|
#evaluate_functions(functions) ⇒ Object
91
92
93
94
95
96
97
|
# File 'lib/hollerith.rb', line 91
def evaluate_functions functions
if functions.compact.any?
functions.compact.each do |function|
evaluate_function(function)
end
end
end
|
#execute_hook_implementation(definition) ⇒ Object
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
# File 'lib/hollerith.rb', line 33
def execute_hook_implementation definition
if definition['before'] && definition['before']['functions']
evaluate_functions(definition['before']['functions'])
end
case definition['method']
when 'none'
evaluate_functions(definition['functions'])
when 'conditional'
raise "Not implemented!"
when 'for_each'
before_iteration_functions = definition['for_each']['before_iteration']
each_iteration_rules = definition['for_each']['each_iteration']
break_when = definition['for_each']['break_iteration_if']
next_when = definition['for_each']['next_if']
evaluate_functions(before_iteration_functions)
get_iterator(definition['loop']) do
next if evaluate_conditional(next_when)
evaluate_functions(each_iteration_rules)
break if evaluate_conditional(break_when)
end
end
if definition['finally'] && definition['finally']['functions']
evaluate_functions(definition['finally']['functions'])
end
end
|
#get_iterator(iterator_definition) ⇒ Object
65
66
67
68
69
70
71
72
73
|
# File 'lib/hollerith.rb', line 65
def get_iterator iterator_definition
collection_variable, each_value_variable = iterator_definition.split(' as ')
get_variable_from_context(collection_variable).each do |each_iteration|
@user_context[each_value_variable] = each_iteration
yield
end
end
|
#get_variable_from_context(variable) ⇒ Object
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
# File 'lib/hollerith.rb', line 75
def get_variable_from_context variable
if variable.start_with?('$$_')
value_to_return = @main_context[variable[3..-1].strip]
if value_to_return
return value_to_return
else
raise ArgumentError.new(
"Variable not found #{value_to_return} in this context"
)
end
else
raise ArgumentError.new("Invalid variable definition #{variable}")
end
end
|
#hook_should_be_run(hook_implementation) ⇒ Object
23
24
25
26
27
28
29
30
31
|
# File 'lib/hollerith.rb', line 23
def hook_should_be_run(hook_implementation)
if hook_implementation.has_key?('run_if')
evaluate_conditional(hook_implementation['run_if'])
elsif hook_implementation.has_key?('run_unless')
!evaluate_conditional(hook_implementation['run_unless'])
else
true
end
end
|
#trigger_hook(hook) ⇒ Object
15
16
17
18
19
20
21
|
# File 'lib/hollerith.rb', line 15
def trigger_hook hook
@configuration[hook].each do |each_hook_implementation|
if hook_should_be_run(each_hook_implementation)
execute_hook_implementation(each_hook_implementation)
end
end
end
|