Class: Pacer::Neo4j::Algo::BlockCostEvaluator

Inherits:
Object
  • Object
show all
Includes:
CostEvaluator
Defined in:
lib/pacer-neo4j/algo/block_cost_evaluator.rb

Constant Summary collapse

DIRS = 
{
  Direction::INCOMING => :in,
  Direction::OUTGOING => :out,
  Direction::BOTH => :both
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(block, graph, default) ⇒ BlockCostEvaluator

Returns a new instance of BlockCostEvaluator.



18
19
20
21
22
 
# File 'lib/pacer-neo4j/algo/block_cost_evaluator.rb', line 18

def initialize(block, graph, default)
  @block = block
  @graph = graph
  @default = default.to_f
end

Instance Attribute Details

#block ⇒ Object (readonly)

Returns the value of attribute block.



16
17
18
 
# File 'lib/pacer-neo4j/algo/block_cost_evaluator.rb', line 16

def block
  @block
end

#default ⇒ Object (readonly)

Returns the value of attribute default.



16
17
18
 
# File 'lib/pacer-neo4j/algo/block_cost_evaluator.rb', line 16

def default
  @default
end

#graph ⇒ Object (readonly)

Returns the value of attribute graph.



16
17
18
 
# File 'lib/pacer-neo4j/algo/block_cost_evaluator.rb', line 16

def graph
  @graph
end

Instance Method Details

#getCost(rel, dir) ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/pacer-neo4j/algo/block_cost_evaluator.rb', line 24

def getCost(rel, dir)
  e = Pacer::Wrappers::EdgeWrapper.new graph, Neo4jEdge.new(rel, graph.blueprints_graph)
  result = block.call e, DIRS[dir]
  if result.is_a? Numeric
    result.to_f
  elsif default
    default
  else
    fail Pacer::ClientError, "No cost returned and no default specified: #{ result.inspect }"
  end
end