Class: ObjectTable::MaskedColumn

Inherits:
NArray
  • Object
show all
Defined in:
lib/object_table/masked_column.rb

Constant Summary collapse

EMPTY = 
NArray[]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#indices ⇒ Object

Returns the value of attribute indices.



4
5
6
 
# File 'lib/object_table/masked_column.rb', line 4

def indices
  @indices
end

#parent ⇒ Object

Returns the value of attribute parent.



4
5
6
 
# File 'lib/object_table/masked_column.rb', line 4

def parent
  @parent
end

Class Method Details

.mask(parent, indices) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/object_table/masked_column.rb', line 8

def self.mask(parent, indices)
  if parent.empty?
    masked = parent.slice(indices)
  else
    masked = parent.slice(false, indices)
  end

  if masked.rank <= 0
    column = new(masked.typecode, 0)
  else
    column = cast(masked)
  end

  column.parent = parent
  column.indices = indices
  column
end

Instance Method Details

#[]=(*keys, value) ⇒ Object 



26
27
28
29
30
31
 
# File 'lib/object_table/masked_column.rb', line 26

def []=(*keys, value)
  unless parent.nil? or ((value.is_a?(Array) or value.is_a?(NArray)) and value.empty?)
    parent[false, indices[*keys]] = value
  end
  super
end

#clone ⇒ Object 



42
43
44
45
 
# File 'lib/object_table/masked_column.rb', line 42

def clone
  return NArray.new(typecode, 0) if empty?
  NArray.cast(self).clone
end

#coerce_rev(other, operator) ⇒ Object 



47
48
49
50
 
# File 'lib/object_table/masked_column.rb', line 47

def coerce_rev(other, operator)
  return other.send(operator, EMPTY) if empty?
  other.send(operator, NArray.cast(self))
end