mini_filter.rb

define_filter :keymapper do
  process do |event|
    keys = event.get('[keys]')
    vals = event.get('[vals]')
    next unless keys && vals && !keys.empty? && !vals.empty?
    
    keys.each.with_index do |key,i|
      event.set(key, vals[i])
    end
    
    event
  end
  
  test(
    "keys map to vals",
    :input => { "keys" => ["a", "b"], "vals" => [1,2] },
    :output => {  "keys" => ["a", "b"], "vals" => 1,2, "a" => 1, "b" => 2 }
  )
  
  test(
    "no keys, not problem",
    :input => { "a" => "b" },
    :output => {}
   )
end