class Patterns::Leaf

Leaf -> Node

Acts as a leaf branch to a Composite structure; as a leaf, it may not have children

Public Class Methods

new(name) click to toggle source

Initializes the Leaf class

Calls superclass method 
# File app/models/composite/leaf.rb, line 10
def initialize(name)
  super(name)
end

Public Instance Methods

add(component) click to toggle source

Raises an error, since a leaf may not have a child node

# File app/models/composite/leaf.rb, line 15
def add(component)
  raise AddChildToLeafError, 'Cannot add children to a leaf'
end
display(depth) click to toggle source

Displays this leaf node with dashes indicating its current depth

# File app/models/composite/leaf.rb, line 25
def display(depth)
  str = ''
  depth.times do
    str << '-'
  end
  puts str + @name
end
remove(component) click to toggle source

Raises an error, since a leaf can not remove what it doesn't have

# File app/models/composite/leaf.rb, line 20
def remove(component)
  raise RemoveChildFromLeafError, 'Cannot remove children from a leaf.'
end