#-----------------------------------------------------
# support define and bind variable dynamically
#-----------------------------------------------------
$dyn_vars = nil

# set value to a variable
def set_var(var_name, var_value)
  if $dyn_vars == nil
    $dyn_vars = binding
  end

  strEval = var_name + "=" + var_value
  eval strEval, $dyn_vars
end

# bind string with $dyn_vars context
def bind_with_dyn_vars(str)
  if $dyn_vars == nil
    $dyn_vars = binding
  end

  strEval = '"' + str + '"'
  return eval strEval, $dyn_vars
end

# evaluate operation/statement with $dyn_vars context
def eval_with_dyn_vars(operation)
  if $dyn_vars == nil
    $dyn_vars = binding
  end

  eval operation, $dyn_vars
end

def bind_with_dyn_json_vars(json, bind_json)
  if json.kind_of? Hash
    json.each_pair do |k, v|
      if v.kind_of? String
        bind_json[bind_with_dyn_vars(k)] = bind_with_dyn_json_vars(v, bind_json)
      elsif v.kind_of? Hash
        temp = Hash.new
        v.each_pair do |k1, v1|
          temp[bind_with_dyn_vars(k1)] = bind_with_dyn_json_vars(v1, temp)
        end
        bind_json[bind_with_dyn_vars(k)] = temp
      elsif v.kind_of? Array
        temp1 = Array.new
        v.each {|item|
          temp2 = Hash.new
          bind_with_dyn_json_vars(item, temp2)
          temp1 << temp2
        }
        bind_json[bind_with_dyn_vars(k)] = temp1
      end
    end
  elsif json.kind_of? Array
    temp1 = Array.new
    json.each {|item|
      temp2 = Hash.new
      bind_with_dyn_json_vars(item, temp2)
      temp1 << temp2
    }
    return temp1
  else
    return bind_with_dyn_vars(json)
  end
end