Module: TraceVisualization::Repetitions::Concatenation

Defined in:
lib/trace_visualization/repetitions/concatenation.rb

Class Method Summary collapse

Class Method Details

.concat_condition(left, right, delta, positions_min_size) ⇒ Object

Condition for potential concatenation



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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 83

def self.concat_condition(left, right, delta, positions_min_size)
  delta >= 0 && left.id != right.id && 
    left.positions_size  >= positions_min_size && 
    right.positions_size >= positions_min_size
end

.create_repetition(left, right, delta, lps, rps) ⇒ Object

Create repetition

Parameters:

  • left (TraceVisualization::Repetition) —

    left parent

  • right (TraceVisualization::Repetition) —

    right parent

  • delta
  • lps
  • rps 


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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 123

def self.create_repetition(left, right, delta, lps, rps)
  r = left.class.new(left.length + right.length + delta, lps, rps)

  r.k          = left.k + right.k + delta
  r.pcount     = left.pcount + right.pcount
  r.left       = left
  r.right      = right
  r.strict_ids = left.strict_ids + right.strict_ids

  r
end

.process(context, options = {}) ⇒ Object 



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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 7

def self.process(context, options = {})
  Utils.set_default_options(options, { :positions_min_size => 3, :k => 3 })
  k = options[:k]
  
  result = []
  
  useful_cnt = 0

  pairs_cnt = {}
  context.repetitions_by_line.each do |item|
    for i in 0 ... item.size
      for j in i + 1 ... item.size
        left, right = item[i][0], item[j][0]
        delta = k - left.k - right.k

        next if not concat_condition(left, right, delta, options[:positions_min_size])

        key = (left.id << 32) + right.id
        val = (pairs_cnt[key] || 0) + 1
        pairs_cnt[key] = val
        next if val != options[:positions_min_size]

        lps, rps = process_common_positions(left, right, delta, context)

        if lps.size >= options[:positions_min_size]
          result << create_repetition(left, right, delta, lps, rps)
        end

        useful_cnt += 1        
      end
    end
  end
  
  options[:counter] << [k, useful_cnt] if options[:counter]
  
  process_new_repetitions(result, context)
  
  context.repetitions.concat(result)
end

.process_common_positions(left, right, delta, context) ⇒ Object

Attention Position arrays are modified in place which can lead to side effects. Don’t send left == right!



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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 91

def self.process_common_positions(left, right, delta, context)
  lr_pos = left.left_positions
  lr_pos.collect! { |pos| pos + left.length + delta }

  rr_pos = right.left_positions
  
  cpr = lr_pos & rr_pos
  cpl = cpr.collect { |pos| pos - left.length - delta }
  
  idx = 0
  while idx < cpr.size
    xxx = context.mapping[cpl[idx] + left.length ... cpr[idx]]
    xxx = xxx.join if xxx.instance_of? Array
    if xxx.scan(TraceVisualization::FORBIDDEN_CHARS).size != 0
      cpr.delete_at(idx)
      cpl.delete_at(idx)
    else
      idx += 1
    end
  end

  lr_pos.collect! { |lpos| lpos - left.length - delta }

  [cpl, cpr]
end

.process_full_search(rs, k, context, options = {}) ⇒ Object 



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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 51

def self.process_full_search(rs, k, context, options = {})
  opts = {
    :positions_min_size => 3
  }.merge options
  
  result = []
  
  useful_cnt = 0

  for left in rs
    for right in rs
      delta = k - left.k - right.k
      next if not concat_condition(left, right, delta, options[:positions_min_size])

      # @@processed_path.add(key(left, right, delta))  

      lps, rps = process_common_positions(left, right, delta, context)

      if lps.size >= options[:positions_min_size]
        result << create_repetition(left, right, delta, lps, rps)
      end

      useful_cnt += 1
    end
  end

  puts "Total: #{rs.size ** 2} #{useful_cnt} #{result.size}"
  
  rs.concat(result)
end

.process_new_repetitions(new_repetitions, context) ⇒ Object 



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# File 'lib/trace_visualization/repetitions/concatenation.rb', line 47

def self.process_new_repetitions(new_repetitions, context)
  context.init_repetitions_by_line(new_repetitions)
end