Class: Jievro::Ast::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/jievro/ast/node.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(initializer, parent = nil, id = nil) ⇒ Node

Returns a new instance of Node.



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# File 'lib/jievro/ast/node.rb', line 6

def initialize(initializer, parent = nil, id = nil)
  fail Exception, 'The initializer must be Hash' \
    unless initializer.is_a?(Hash)

  fail Exception, 'Initializer is missing __type value' \
    unless initializer.key?(:__type)

  if id.nil?
    @id = Ast::Node.generate_next_id
  else
    Ast::Node.set_current_id(id)
    @id = id
  end

  @parent = parent
  @value = {}
  @type = initializer[:__type]

  initializer.keys.each do |k|
    next if k == :__type

    value = initializer[k]

    if literal?(value)
      @value[k] = value
    else
      if array?(value)
        @value[k] = []
        value.each_with_index do |v, i|
          @value[k][i] = Node.new(v, self)
        end
      else
        @value[k] = Node.new(value, self)
      end
    end
  end
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/jievro/ast/node.rb', line 4

def id
  @id
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/jievro/ast/node.rb', line 4

def parent
  @parent
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/jievro/ast/node.rb', line 4

def type
  @type
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/jievro/ast/node.rb', line 44

def [](key)
  fail Exception, "Key '#{key}' is invalid" \
    unless @value.key?(key)

  @value[key]
end

#each ⇒ Object 



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# File 'lib/jievro/ast/node.rb', line 82

def each
  each_with_index do |v, _|
    yield v
  end
end

#each_with_index ⇒ Object 



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# File 'lib/jievro/ast/node.rb', line 88

def each_with_index
  @value.keys.each do |v|
    yield @value[v], v
  end
end

#keys ⇒ Object 



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# File 'lib/jievro/ast/node.rb', line 51

def keys
  @value.keys
end

#serialize ⇒ Object 



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# File 'lib/jievro/ast/node.rb', line 55

def serialize
  if array?(@value)
    serialized = []
  else
    serialized = {
      __type: type
    }
  end

  each_with_index do |v, k|
    if literal?(v)
      serialized[k] = v
    else
      if array?(v)
        serialized[k] = []
        v.each_with_index do |w, i|
          serialized[k][i] = w.serialize
        end
      else
        serialized[k] = v.serialize
      end
    end
  end

  serialized
end