Class: Ferret::Search::PhrasePositions

Inherits:
Object
  • Object
show all
Defined in:
lib/ferret/search/phrase_positions.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tp_enum, offset) ⇒ PhrasePositions

Returns a new instance of PhrasePositions.



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# File 'lib/ferret/search/phrase_positions.rb', line 6

def initialize(tp_enum, offset) 
  @tp_enum = tp_enum
  @offset = offset
  @count = @position = @doc = -1
  @next = nil
end

Instance Attribute Details

#doc ⇒ Object (readonly)

Returns the value of attribute doc.



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# File 'lib/ferret/search/phrase_positions.rb', line 3

def doc
  @doc
end

#next ⇒ Object

Returns the value of attribute next.



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# File 'lib/ferret/search/phrase_positions.rb', line 4

def next
  @next
end

#position ⇒ Object (readonly)

Returns the value of attribute position.



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# File 'lib/ferret/search/phrase_positions.rb', line 3

def position
  @position
end

Instance Method Details

#first_position ⇒ Object 



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# File 'lib/ferret/search/phrase_positions.rb', line 36

def first_position()
  @count = @tp_enum.freq       # read first pos
  next_position()
end

#next? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ferret/search/phrase_positions.rb', line 13

def next?()
  if not @tp_enum.next?
    @tp_enum.close()          # close stream
    @doc = Scorer::MAX_DOCS    # sentinel value
    return false
  end
  @doc = @tp_enum.doc
  @position = 0
  return true
end

#next_position ⇒ Object 



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# File 'lib/ferret/search/phrase_positions.rb', line 41

def next_position()
  @count -= 1
  if @count >= 0          # read subsequent pos's
    @position = @tp_enum.next_position() - @offset
    return true
  else
    return false
  end
end

#skip_to(target) ⇒ Object 



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# File 'lib/ferret/search/phrase_positions.rb', line 24

def skip_to(target)
  if not @tp_enum.skip_to(target)
    @tp_enum.close()          # close stream
    @doc = Scorer::MAX_DOCS    # sentinel value
    return false
  end
  @doc = @tp_enum.doc
  @position = 0
  return true
end

#to_s ⇒ Object 



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# File 'lib/ferret/search/phrase_positions.rb', line 51

def to_s
  "pp->(doc => #{@doc}, position => #{position})"
end