Class: ActiverecordCallbackLens::Graph::GraphBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/activerecord_callback_lens/graph/graph_builder.rb

Overview

Converts an array of parsed CallbackDefinition objects into a Graph.

Each definition becomes a CallbackNode. When a definition has a condition_tree, the tree is walked recursively and mapped onto graph nodes:

AndNode / OrNode  -> ConditionNode, then recurse into children
NotNode           -> no node; recurse into the child (negation is dropped
                     for the v0.1 dependency view)
PredicateNode     -> PredicateNode graph node
MethodRefNode     -> MethodNode; recurse into expanded_tree when present

Every condition/predicate/method node gets a :requires edge pointing at its parent (the callback or enclosing combinator), so edges flow from a dependency up to the thing that depends on it.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(definitions) ⇒ GraphBuilder

Returns a new instance of GraphBuilder.

Parameters:



30
31
32
33
34
35
 
# File 'lib/activerecord_callback_lens/graph/graph_builder.rb', line 30

def initialize(definitions)
  @definitions = definitions
  @nodes = []
  @edges = []
  @counter = 0
end

Class Method Details

.build(definitions) ⇒ Graph::Graph

Parameters:

Returns:



25
26
27
 
# File 'lib/activerecord_callback_lens/graph/graph_builder.rb', line 25

def self.build(definitions)
  new(definitions).build
end

Instance Method Details

#build ⇒ Graph::Graph

Returns:



38
39
40
41
 
# File 'lib/activerecord_callback_lens/graph/graph_builder.rb', line 38

def build
  @definitions.each { |definition| add_callback(definition) }
  Graph.new(nodes: @nodes, edges: @edges)
end