Class: JPathTree

Inherits:
Object
  • Object
show all
Defined in:
lib/json/stream/j_path_tree.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(jpath) ⇒ JPathTree

Returns a new instance of JPathTree.



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# File 'lib/json/stream/j_path_tree.rb', line 4

def initialize(jpath)
  self.jpath = jpath
  self.tree = (jpath.nil? or jpath.empty? or !jpath.match(/^\//)) ? nil : {}
  self.tree || return

  prev_key = nil
  self.jpath.split('/')[1..-1].each do |name|
    name = name.intern
    self.tree[name] = {prev: prev_key, value: false, next: nil}
    self.tree[prev_key][:next] = name if prev_key
    prev_key = name
  end
end

Instance Attribute Details

#jpath ⇒ Object

Returns the value of attribute jpath.



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# File 'lib/json/stream/j_path_tree.rb', line 2

def jpath
  @jpath
end

#tree ⇒ Object

Returns the value of attribute tree.



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# File 'lib/json/stream/j_path_tree.rb', line 2

def tree
  @tree
end

Instance Method Details

#parsing_feasible?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/json/stream/j_path_tree.rb', line 18

def parsing_feasible?(key)
  key = key.is_a?(String) ? key.intern : nil
  return if key.nil? or self.tree.nil? or self.tree.empty?

  node = self.tree[key]

  return unless (node)
  return if (node[:value])

  prev_node = self.tree[node[:prev]]
  next_node = self.tree[node[:next]]

  if (next_node.nil?)
    if (prev_node.nil? || prev_node[:value])
      node[:value] = true
      return true
    end
  elsif (prev_node.nil? || prev_node[:value])
    node[:value] = true
    return nil
  else
    return nil
  end
end