Class: Arrow::StructArrayBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/arrow/struct-array-builder.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.build(data_type, values) ⇒ Object 



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# File 'lib/arrow/struct-array-builder.rb', line 21

def build(data_type, values)
  builder = new(data_type)
  builder.build(values)
end

Instance Method Details

#[](index_or_name) ⇒ Object 



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# File 'lib/arrow/struct-array-builder.rb', line 27

def [](index_or_name)
  find_field_builder(index_or_name)
end

#append(*values) ⇒ Object

Since:

  • 0.12.0



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# File 'lib/arrow/struct-array-builder.rb', line 114

def append(*values)
  if values.empty?
    # For backward compatibility
    append_value_raw
  else
    super
  end
end

#append_value ⇒ Object #append_value(value) ⇒ Object

Overloads:

  • #append_value ⇒ Object

    Starts appending a struct record. You need to append values of fields.

  • #append_value(value) ⇒ Object

    Appends a struct record including values of fields.

    Parameters:

    • value (nil, ::Array, Hash) —

      The struct record value.

      If this is ‘nil`, the struct record is null.

      If this is ‘Array` or `Hash`, they are values of fields.

Since:

  • 0.12.0



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# File 'lib/arrow/struct-array-builder.rb', line 60

def append_value(*args)
  n_args = args.size

  case n_args
  when 0
    append_value_raw
  when 1
    value = args[0]
    case value
    when nil
      append_null
    when ::Array
      append_value_raw
      cached_field_builders.zip(value) do |builder, sub_value|
        builder.append(sub_value)
      end
    when Hash
      append_value_raw
      local_name_to_builder = cached_name_to_builder.dup
      value.each do |name, sub_value|
        builder = local_name_to_builder.delete(name.to_s)
        builder.append(sub_value)
      end
      local_name_to_builder.each do |_, builder|
        builder.append_null
      end
    else
      message =
        "struct value must be nil, Array or Hash: #{value.inspect}"
      raise ArgumentError, message
    end
  else
    message = "wrong number of arguments (given #{n_args}, expected 0..1)"
    raise ArgumentError, message
  end
end

#append_value_raw ⇒ Object 



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# File 'lib/arrow/struct-array-builder.rb', line 42

alias_method :append_value_raw, :append_value

#append_values(values, is_valids = nil) ⇒ Object 



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# File 'lib/arrow/struct-array-builder.rb', line 97

def append_values(values, is_valids=nil)
  if is_valids
    is_valids.each_with_index do |is_valid, i|
      if is_valid
        append_value(values[i])
      else
        append_null
      end
    end
  else
    values.each do |value|
      append_value(value)
    end
  end
end

#find_field_builder(index_or_name) ⇒ Object 



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# File 'lib/arrow/struct-array-builder.rb', line 31

def find_field_builder(index_or_name)
  case index_or_name
  when String, Symbol
    name = index_or_name
    cached_name_to_builder[name.to_s]
  else
    index = index_or_name
    cached_field_builders[index]
  end
end