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Class: Gem::Resolver::Molinillo::DependencyGraph::AddEdgeNoCircular

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Action
Instance Chain:
self, Action
Inherits: Gem::Resolver::Molinillo::DependencyGraph::Action
Defined in: lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb

Overview

Action

AddEdgeNoCircular

Class Method Summary

Action - Inherited

.action_name

Instance Attribute Summary

Action - Inherited

#next, #previous

Instance Method Summary

Action - Inherited

#down

Reverses the action on the given graph.
#up

Performs the action on the given graph.

Constructor Details

.new(origin, destination, requirement) ⇒ AddEdgeNoCircular

Initialize an action to add an edge to a dependency graph

Parameters:

  • origin (String) —

    the name of the origin of the edge

  • destination (String) —

    the name of the destination of the edge

  • requirement (Object) —

    the requirement that the edge represents

[ GitHub ] 

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 51



def initialize(origin, destination, requirement)
  @origin = origin
  @destination = destination
  @requirement = requirement
end


  







Class Method Details



  

    .action_name  ⇒ Symbol 
  



  

    
  





  
Returns:


    
  
  • 
    (Symbol)
—    
    

    The name of the action.
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 11



def self.action_name
  :add_vertex
end


  







Instance Attribute Details



  

    #destination  ⇒ String  (readonly)
  



  

    
  





  
Returns:


    
  
  • 
    (String)
—    
    

    the name of the destination of the edge
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 36



attr_reader :destination


  








  

    #origin  ⇒ String  (readonly)
  



  

    
  





  
Returns:


    
  
  • 
    (String)
—    
    

    the name of the origin of the edge
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 33



attr_reader :origin


  








  

    #requirement  ⇒ Object  (readonly)
  



  

    
  





  
Returns:


    
  
  • 
    (Object)
—    
    

    the requirement that the edge represents
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 39



attr_reader :requirement


  







Instance Method Details



  

    #delete_first(array, item)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 59



def delete_first(array, item)
  return unless index = array.index(item)
  array.delete_at(index)
end


  








  

    #down(graph)  ⇒ Void 
  



  

    

Reverses the action on the given graph.


  





  
Parameters:





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 24



def down(graph)
  edge = make_edge(graph)
  delete_first(edge.origin.outgoing_edges, edge)
  delete_first(edge.destination.incoming_edges, edge)
end


  








  

    #make_edge(graph)  ⇒ Edge 
  



  

    
  





  
Parameters:



Returns:


    
  
  • 
    (Edge)
—    
    

    The edge this action adds
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 43



def make_edge(graph)
  Edge.new(graph.vertex_named(origin), graph.vertex_named(destination), requirement)
end


  








  

    #up(graph)  ⇒ Void 
  



  

    

Performs the action on the given graph.


  





  
Parameters:





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/add_edge_no_circular.rb', line 16



def up(graph)
  edge = make_edge(graph)
  edge.origin.outgoing_edges << edge
  edge.destination.incoming_edges << edge
  edge
end