Class: Factbase::Looged::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/factbase/looged.rb

Overview

Query decorator.

This is an internal class, it is not supposed to be instantiated directly.

Instance Method Summary collapse

Constructor Details

#initialize(fb, expr, loog) ⇒ Query

Returns a new instance of Query.



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# File 'lib/factbase/looged.rb', line 115

def initialize(fb, expr, loog)
  @fb = fb
  @expr = expr
  @loog = loog
end

Instance Method Details

#delete! ⇒ Object 



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# File 'lib/factbase/looged.rb', line 168

def delete!
  r = nil
  before = @fb.size
  tail =
    Factbase::Looged.elapsed do
      r = @fb.query(@expr).delete!
    end
  raise ".delete! of #{@query.class} returned #{r.class}" unless r.is_a?(Integer)
  if before.zero?
    @loog.debug("There were no facts, nothing deleted by '#{@expr}' #{tail}")
  elsif r.zero?
    @loog.debug("No facts out of #{before} deleted by '#{@expr}' #{tail}")
  else
    @loog.debug("Deleted #{r} fact(s) out of #{before} by '#{@expr}' #{tail}")
  end
  r
end

#each(params = {}) ⇒ Object 



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# File 'lib/factbase/looged.rb', line 136

def each(params = {}, &)
  q = Factbase::Syntax.new(@expr).to_term.to_s
  if block_given?
    r = nil
    tail =
      Factbase::Looged.elapsed do
        r = @fb.query(@expr).each(params, &)
      end
    raise ".each of #{@query.class} returned #{r.class}" unless r.is_a?(Integer)
    if r.zero?
      @loog.debug("Nothing found by '#{q}' #{tail}")
    else
      @loog.debug("Found #{r} fact(s) by '#{q}' #{tail}")
    end
    r
  else
    array = []
    tail =
      Factbase::Looged.elapsed do
        @fb.query(@expr).each(params) do |f|
          array << f
        end
      end
    if array.empty?
      @loog.debug("Nothing found by '#{q}' #{tail}")
    else
      @loog.debug("Found #{array.size} fact(s) by '#{q}' #{tail}")
    end
    array
  end
end

#one(params = {}) ⇒ Object 



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# File 'lib/factbase/looged.rb', line 121

def one(params = {})
  q = Factbase::Syntax.new(@expr).to_term.to_s
  r = nil
  tail =
    Factbase::Looged.elapsed do
      r = @fb.query(@expr).one(params)
    end
  if r.nil?
    @loog.debug("Nothing found by '#{q}' #{tail}")
  else
    @loog.debug("Found #{r} (#{r.class}) by '#{q}' #{tail}")
  end
  r
end