Class: ArrowFormat::Array

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type, size, validity_buffer) ⇒ Array

Returns a new instance of Array.



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# File 'lib/arrow-format/array.rb', line 28

def initialize(type, size, validity_buffer)
  @type = type
  @size = size
  @offset = 0
  @validity_buffer = validity_buffer
  @sliced_buffers = {}
end

Instance Attribute Details

#offset ⇒ Object (readonly)

Returns the value of attribute offset.



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# File 'lib/arrow-format/array.rb', line 26

def offset
  @offset
end

#size ⇒ Object (readonly) Also known as: length

Returns the value of attribute size.



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# File 'lib/arrow-format/array.rb', line 24

def size
  @size
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/arrow-format/array.rb', line 23

def type
  @type
end

#validity_buffer ⇒ Object (readonly)

Returns the value of attribute validity_buffer.



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

def validity_buffer
  @validity_buffer
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arrow-format/array.rb', line 59

def empty?
  @size.zero?
end

#n_nulls ⇒ Object 



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# File 'lib/arrow-format/array.rb', line 51

def n_nulls
  if @validity_buffer.nil?
    0
  else
    @size - validity_bitmap.popcount
  end
end

#null?(i) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arrow-format/array.rb', line 47

def null?(i)
  not valid?(i)
end

#slice(offset, size = nil) ⇒ Object 



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# File 'lib/arrow-format/array.rb', line 36

def slice(offset, size=nil)
  sliced = dup
  sliced.slice!(@offset + offset, size || @size - offset)
  sliced
end

#valid?(i) ⇒ Boolean

Returns:

  • (Boolean) 


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

def valid?(i)
  return true if @validity_buffer.nil?
  validity_bitmap[i]
end