Module: JsonPath::Dig

Included in:
Enumerable, Parser
Defined in:
lib/jsonpath/dig.rb

Instance Method Summary collapse

Instance Method Details

#dig(context, *keys) ⇒ Object

Similar to what Hash#dig or Array#dig



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# File 'lib/jsonpath/dig.rb', line 7

def dig(context, *keys)
  keys.inject(context){|memo,k|
    dig_one(memo, k)
  }
end

#dig_as_hash(context, keys) ⇒ Object

Returns a hash mapping each key from keys to its dig value on context.



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# File 'lib/jsonpath/dig.rb', line 15

def dig_as_hash(context, keys)
  keys.each_with_object({}) do |k, memo|
    memo[k] = dig_one(context, k)
  end
end

#dig_one(context, k) ⇒ Object

Dig the value of k on context.



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# File 'lib/jsonpath/dig.rb', line 22

def dig_one(context, k)
  case context
  when Hash
    context[@options[:use_symbols] ? k.to_sym : k]
  when Array
    context[k.to_i]
  else
    if context.respond_to?(:dig)
      context.dig(k)
    elsif @options[:allow_send]
      context.__send__(k)
    end
  end
end

#yield_if_diggable(context, k, &blk) ⇒ Object

Yields the block if context has a diggable value for k



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# File 'lib/jsonpath/dig.rb', line 39

def yield_if_diggable(context, k, &blk)
  case context
  when Array
    nil
  when Hash
    k = @options[:use_symbols] ? k.to_sym : k
    return yield if context.key?(k) || @options[:default_path_leaf_to_null]
  else
    if context.respond_to?(:dig)
      digged = dig_one(context, k)
      yield if !digged.nil? || @options[:default_path_leaf_to_null]
    elsif @options[:allow_send] && context.respond_to?(k.to_s) && !Object.respond_to?(k.to_s)
      yield
    end
  end
end