Class: Google::Protobuf::RepeatedField

Inherits:
Object
  • Object
show all
Extended by:
Forwardable, Internal::Convert
Includes:
Enumerable, Internal::Convert
Defined in:
lib/google/protobuf/repeated_field.rb,
lib/google/protobuf/ffi/repeated_field.rb

Defined Under Namespace

Classes: ProxyingEnumerator

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Internal::Convert

convert_ruby_to_upb, convert_upb_to_ruby, map_create_hash, message_value_deep_copy, repeated_field_create_array, scalar_create_hash, to_h_internal

Class Method Details

.define_array_wrapper_method(method_name) ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 104

def define_array_wrapper_method(method_name)
  define_method(method_name) do |*args, &block|
    arr = self.to_a
    result = arr.send(method_name, *args)
    self.replace(arr)
    return result if result
    return block ? block.call : result
  end
end

.define_array_wrapper_with_result_method(method_name) ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 116

def define_array_wrapper_with_result_method(method_name)
  define_method(method_name) do |*args, &block|
    # result can be an Enumerator, Array, or nil
    # Enumerator can sometimes be returned if a block is an optional argument and it is not passed in
    # nil usually specifies that no change was made
    result = self.to_a.send(method_name, *args, &block)
    if result
      new_arr = result.to_a
      self.replace(new_arr)
      if result.is_a?(Enumerator)
        # generate a fresh enum; rewinding the exiting one, in Ruby 2.2, will
        # reset the enum with the same length, but all the #next calls will
        # return nil
        result = new_arr.to_enum
        # generate a wrapper enum so any changes which occur by a chained
        # enum can be captured
        ie = ProxyingEnumerator.new(self, result)
        result = ie.to_enum
      end
    end
    result
  end
end

.new(type, type_class = nil, initial_values = []) ⇒ Object

call-seq:

RepeatedField.new(type, type_class = nil, initial_values = [])

Creates a new repeated field. The provided type must be a Ruby symbol, and an take on the same values as those accepted by FieldDescriptor#type=. If the type is :message or :enum, type_class must be non-nil, and must be the Ruby class or module returned by Descriptor#msgclass or EnumDescriptor#enummodule, respectively. An initial list of elements may also be provided.



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 48

def self.new(type, type_class = nil, initial_values = [])
  instance = allocate
  # TODO This argument mangling doesn't agree with the type signature in the comments
  # but is required to make unit tests pass;
  if type_class.is_a?(Enumerable) and initial_values.empty? and ![:enum, :message].include?(type)
    initial_values = type_class
    type_class = nil
  end
  instance.send(:initialize, type, type_class: type_class, initial_values: initial_values)
  instance
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 226

def +(other)
  if other.is_a? RepeatedField
    if type != other.instance_variable_get(:@type) or descriptor != other.instance_variable_get(:@descriptor)
      raise ArgumentError.new "Attempt to append RepeatedField with different element type."
    end
    fuse_arena(other.send(:arena))
    super_set = dup
    other.send(:each_msg_val) do |msg_val|
      super_set.send(:append_msg_val, msg_val)
    end
    super_set
  elsif other.is_a? Enumerable
    super_set = dup
    super_set.push(*other.to_a)
  else
    raise ArgumentError.new "Unknown type appending to RepeatedField"
  end
end

#<<(element) ⇒ Object

Raises:

  • (FrozenError) 


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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 155

def <<(element)
  raise FrozenError if frozen?
  push element
end

#==(other) ⇒ Object 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 187

def ==(other)
  return true if other.object_id == object_id
  if other.is_a? RepeatedField
    return false unless other.length == length
    each_msg_val_with_index do |msg_val, i|
      other_msg_val = Google::Protobuf::FFI.get_msgval_at(other.send(:array), i)
      unless Google::Protobuf::FFI.message_value_equal(msg_val, other_msg_val, type, descriptor)
        return false
      end
    end
    return true
  elsif other.is_a? Enumerable
    return to_ary == other.to_a
  end
  false
end

#[](*args) ⇒ Object Also known as: at 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 74

def [](*args)
  count = length
  if args.size < 1
    raise ArgumentError.new "Index or range is a required argument."
  end
  if args[0].is_a? Range
    if args.size > 1
      raise ArgumentError.new "Expected 1 when passing Range argument, but got #{args.size}"
    end
    range = args[0]
    # Handle begin-less and/or endless ranges, when supported.
    index_of_first = range.respond_to?(:begin) ? range.begin : range.last
    index_of_first = 0 if index_of_first.nil?
    end_of_range = range.respond_to?(:end) ? range.end : range.last
    index_of_last = end_of_range.nil? ? -1 : end_of_range

    if index_of_last < 0
      index_of_last += count
    end
    unless range.exclude_end? and !end_of_range.nil?
      index_of_last += 1
    end
    index_of_first += count if index_of_first < 0
    length = index_of_last - index_of_first
    return [] if length.zero?
  elsif args[0].is_a? Integer
    index_of_first = args[0]
    index_of_first += count if index_of_first < 0
    if args.size > 2
      raise ArgumentError.new "Expected 1 or 2 arguments, but got #{args.size}"
    end
    if args.size == 1 # No length specified, return one element
      if array.null? or index_of_first < 0 or index_of_first >= count
        return nil
      else
        return convert_upb_to_ruby(Google::Protobuf::FFI.get_msgval_at(array, index_of_first), type, descriptor, arena)
      end
    else
      length = [args[1],count].min
    end
  else
    raise NotImplementedError
  end

  if array.null? or index_of_first < 0 or index_of_first >= count
    nil
  else
    if index_of_first + length > count
      length = count - index_of_first
    end
    if length < 0
      nil
    else
      subarray(index_of_first, length)
    end
  end
end

#[]=(index, value) ⇒ Object

Raises:

  • (FrozenError) 


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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 134

def []=(index, value)
  raise FrozenError if frozen?
  count = length
  index += count if index < 0
  return nil if index < 0
  if index >= count
    resize(index+1)
    empty_message_value = Google::Protobuf::FFI::MessageValue.new # Implicitly clear
    count.upto(index-1) do |i|
      Google::Protobuf::FFI.array_set(array, i, empty_message_value)
    end
  end
  Google::Protobuf::FFI.array_set(array, index, convert_ruby_to_upb(value, arena, type, descriptor))
  nil
end

#clear ⇒ Object

Raises:

  • (FrozenError) 


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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 166

def clear
  raise FrozenError if frozen?
  resize 0
  self
end

#concat(other) ⇒ Object 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 245

def concat(other)
  raise ArgumentError.new "Expected Enumerable, but got #{other.class}" unless other.is_a? Enumerable
  push(*other.to_a)
end

#dup ⇒ Object Also known as: clone 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 177

def dup
  instance = self.class.allocate
  instance.send(:initialize, type, descriptor: descriptor, arena: arena)
  each_msg_val do |element|
    instance.send(:append_msg_val, element)
  end
  instance
end

#each(&block) ⇒ Object

call-seq:

RepeatedField.each(&block)

Invokes the block once for each element of the repeated field. RepeatedField also includes Enumerable; combined with this method, the repeated field thus acts like an ordinary Ruby sequence.



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 67

def each &block
  each_msg_val do |element|
    yield(convert_upb_to_ruby(element, type, descriptor, arena))
  end
  self
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/google/protobuf/repeated_field.rb', line 92

def empty?
  self.size == 0
end

#first(n = nil) ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 58

def first(n=nil)
  if n.nil?
    return self[0]
  elsif n < 0
    raise ArgumentError, "negative array size"
  else
    return self[0...n]
  end
end

#hash ⇒ Object 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 218

def hash
  return_value = 0
  each_msg_val do |msg_val|
    return_value = Google::Protobuf::FFI.message_value_hash(msg_val, type, descriptor, return_value)
  end
  return_value
end

#last(n = nil) ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 69

def last(n=nil)
  if n.nil?
    return self[-1]
  elsif n < 0
    raise ArgumentError, "negative array size"
  else
    start = [self.size-n, 0].max
    return self[start...self.size]
  end
end

#length ⇒ Object Also known as: size 



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 172

def length
  array.null? ? 0 : Google::Protobuf::FFI.array_size(array)
end

#pop(n = nil) ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 81

def pop(n=nil)
  if n
    results = []
    n.times{ results << pop_one }
    return results
  else
    return pop_one
  end
end

#push(*elements) ⇒ Object

Raises:

  • (FrozenError) 


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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 150

def push(*elements)
  raise FrozenError if frozen?
  internal_push(*elements)
end

#replace(replacements) ⇒ Object

Raises:

  • (FrozenError) 


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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 160

def replace(replacements)
  raise FrozenError if frozen?
  clear
  push(*replacements)
end

#slice ⇒ Object 



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# File 'lib/google/protobuf/repeated_field.rb', line 98

alias_method :slice, :[]

#to_ary ⇒ Object

call-seq:

RepeatedField.to_ary => array

Used when converted implicitly into array, e.g. compared to an Array. Also called as a fallback of Object#to_a



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# File 'lib/google/protobuf/ffi/repeated_field.rb', line 210

def to_ary
  return_value = []
  each do |element|
    return_value << element
  end
  return_value
end