Class: Alf::Engine::Summarize::Hash

Inherits:
Object
  • Object
show all
Includes:
Cog, Alf::Engine::Summarize
Defined in:
lib/alf/engine/summarize/hash.rb

Constant Summary

Constants included from Cog

Cog::EMPTY_CHILDREN, Cog::EMPTY_OPTIONS

Instance Attribute Summary collapse

Attributes included from Compiler::Cog

#compiler, #expr

Instance Method Summary collapse

Methods included from Cog

#arguments, #children, #each, #options, #to_s

Methods included from Compiler::Cog

#cog_orders, #orderedby?, #relation_type, #to_ascii_tree, #to_cog, #to_relation

Methods included from Alf::Engine::Summarize

#arguments

Constructor Details

#initialize(operand, by, summarization, allbut, expr = nil, compiler = nil) ⇒ Hash

Creates an Summarize::Hash instance



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# File 'lib/alf/engine/summarize/hash.rb', line 20

def initialize(operand, by, summarization, allbut, expr = nil, compiler = nil)
  super(expr, compiler)
  @operand = operand
  @by = by
  @summarization = summarization
  @allbut = allbut
end

Instance Attribute Details

#allbut ⇒ Boolean (readonly)

Returns Make an allbut summarization?.

Returns:

  • (Boolean) —

    Make an allbut summarization?



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# File 'lib/alf/engine/summarize/hash.rb', line 17

def allbut
  @allbut
end

#by ⇒ AttrList (readonly)

Returns Summarization key.

Returns:

  • (AttrList) —

    Summarization key



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# File 'lib/alf/engine/summarize/hash.rb', line 11

def by
  @by
end

#operand ⇒ Enumerable (readonly)

Returns The operand.

Returns:

  • (Enumerable) —

    The operand



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# File 'lib/alf/engine/summarize/hash.rb', line 8

def operand
  @operand
end

#summarization ⇒ Summarization (readonly)

Returns The summarization to use.

Returns:

  • (Summarization) —

    The summarization to use



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# File 'lib/alf/engine/summarize/hash.rb', line 14

def summarization
  @summarization
end

Instance Method Details

#_each ⇒ Object 



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# File 'lib/alf/engine/summarize/hash.rb', line 29

def _each
  index = Materialize::Hash.new(operand, by, allbut, expr)
  index.each_pair do |k, v|
    yield k.merge(summarization.summarize(v))
  end
end