Class: Gem::Resolver::Molinillo::DependencyGraph::Vertex

Inherits:
Object
  • Object
show all
Defined in:
lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb

Overview

A vertex in a Gem::Resolver::Molinillo::DependencyGraph that encapsulates a #name and a #payload

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, payload) ⇒ Vertex

Initializes a vertex with the given name and payload.

Parameters:



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

def initialize(name, payload)
  @name = name.frozen? ? name : name.dup.freeze
  @payload = payload
  @explicit_requirements = []
  @outgoing_edges = []
  @incoming_edges = []
end

Instance Attribute Details

#explicit_requirements ⇒ Array<Object> (readonly)

Returns the explicit requirements that required this vertex.

Returns:

  • (Array<Object>) —

    the explicit requirements that required this vertex



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 15

def explicit_requirements
  @explicit_requirements
end

#incoming_edges ⇒ Array<Edge>

Returns the edges of #graph that have ‘self` as their Edge#destination.

Returns:



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 44

def incoming_edges
  @incoming_edges
end

#name ⇒ String

Returns the name of the vertex.

Returns:

  • (String) —

    the name of the vertex



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 8

def name
  @name
end

#outgoing_edges ⇒ Array<Edge>

Returns the edges of #graph that have ‘self` as their Edge#origin.

Returns:

  • (Array<Edge>) —

    the edges of #graph that have ‘self` as their Edge#origin



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 40

def outgoing_edges
  @outgoing_edges
end

#payload ⇒ Object

Returns the payload the vertex holds.

Returns:

  • (Object) —

    the payload the vertex holds



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

def payload
  @payload
end

#root ⇒ Boolean Also known as: root?

Returns whether the vertex is considered a root vertex.

Returns:

  • (Boolean) —

    whether the vertex is considered a root vertex



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 18

def root
  @root
end

Instance Method Details

#==(other) ⇒ Boolean Also known as: eql?

Returns whether the two vertices are equal, determined by a recursive traversal of each #successors.

Returns:

  • (Boolean) —

    whether the two vertices are equal, determined by a recursive traversal of each #successors



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 83

def ==(other)
  return true if equal?(other)
  shallow_eql?(other) &&
    successors.to_set == other.successors.to_set
end

#ancestor?(other) ⇒ Boolean Also known as: is_reachable_from?

Is there a path from ‘other` to `self` following edges in the dependency graph?

Returns:

  • (Boolean) —

    true iff there is a path following edges within this #graph



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 118

def ancestor?(other)
  other.path_to?(self)
end

#hash ⇒ Fixnum

Returns a hash for the vertex based upon its #name.

Returns:

  • (Fixnum) —

    a hash for the vertex based upon its #name



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 102

def hash
  name.hash
end

#inspect ⇒ String

Returns a string suitable for debugging.

Returns:

  • (String) —

    a string suitable for debugging



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 77

def inspect
  "#{self.class}:#{name}(#{payload.inspect})"
end

#path_to?(other) ⇒ Boolean Also known as: descendent?

Is there a path from ‘self` to `other` following edges in the dependency graph?

Returns:

  • (Boolean) —

    true iff there is a path following edges within this #graph



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 109

def path_to?(other)
  equal?(other) || successors.any? { |v| v.path_to?(other) }
end

#predecessors ⇒ Array<Vertex>

Returns the vertices of #graph that have an edge with ‘self` as their Edge#destination.

Returns:



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 48

def predecessors
  incoming_edges.map(&:origin)
end

#recursive_predecessors ⇒ Array<Vertex>

Returns the vertices of #graph where ‘self` is a #descendent?.

Returns:



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 54

def recursive_predecessors
  vertices = predecessors
  vertices += vertices.map(&:recursive_predecessors).flatten(1)
  vertices.uniq!
  vertices
end

#recursive_successors ⇒ Array<Vertex>

Returns the vertices of #graph where ‘self` is an #ancestor?.

Returns:



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 69

def recursive_successors
  vertices = successors
  vertices += vertices.map(&:recursive_successors).flatten(1)
  vertices.uniq!
  vertices
end

#requirements ⇒ Array<Object>

Returns all of the requirements that required this vertex.

Returns:

  • (Array<Object>) —

    all of the requirements that required this vertex



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 34

def requirements
  incoming_edges.map(&:requirement) + explicit_requirements
end

#shallow_eql?(other) ⇒ Boolean

Returns whether the two vertices are equal, determined solely by #name and #payload equality.

Parameters:

  • other (Vertex) —

    the other vertex to compare to

Returns:

  • (Boolean) —

    whether the two vertices are equal, determined solely by #name and #payload equality



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 92

def shallow_eql?(other)
  return true if equal?(other)
  other &&
    name == other.name &&
    payload == other.payload
end

#successors ⇒ Array<Vertex>

Returns the vertices of #graph that have an edge with ‘self` as their Edge#origin.

Returns:

  • (Array<Vertex>) —

    the vertices of #graph that have an edge with ‘self` as their Edge#origin



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# File 'lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph/vertex.rb', line 63

def successors
  outgoing_edges.map(&:destination)
end