Method updateFromQueryString

src/tsd/client/MetricForm.java:222–292

(final String m, final String o)

  }

  public void updateFromQueryString(final String m, final String o) {
    // TODO: Try to reduce code duplication with GraphHandler.parseQuery().
    // m is of the following forms:
    //  agg:[interval-agg:][rate[{counter[,max[,reset]]}:]metric[{tag=value,...}]
    // Where the parts in square brackets `[' .. `]' are optional.
    final String[] parts = m.split(":");
    int i = parts.length;
    if (i < 2 || i > 4) {
      return;  // Malformed.
    }

    setSelectedItem(aggregators, parts[0]);

    i--;  // Move to the last part (the metric name).
    metric.setText(parseWithMetric(parts[i]));
    metric_change_handler.onMetricChange(this);

    final boolean rate = parts[--i].startsWith("rate");
    this.rate.setValue(rate, false);
    LocalRateOptions rate_options = parseRateOptions(rate, parts[i]);
    this.rate_counter.setValue(rate_options.is_counter, false);
    final long rate_counter_max = rate_options.counter_max;
    this.counter_max.setValue(
        rate_counter_max == Long.MAX_VALUE ? "" : Long.toString(rate_counter_max), 
        false);
    this.counter_reset_value
        .setValue(Long.toString(rate_options.reset_value), false);
    if (rate) {
      i--;
    }

    // downsampling function & interval.
    if (i > 0) {
      // First dash should have been given.
      final int first_dash = parts[1].indexOf('-', 1); // 1st char can't be `-'.
      if (first_dash < 0) {
        disableDownsample();
        return;  // Invalid downsampling specifier.
      }

      // Second dash (and subsequent fill policy) are optional.
      final int second_dash = parts[1].indexOf('-', first_dash + 1);

      downsample.setValue(true, false);

      downsampler.setEnabled(true);
      fill_policy.setEnabled(true);
      if (-1 == second_dash) {
        // No fill policy given.
        setSelectedItem(downsampler, parts[1].substring(first_dash + 1));

        // So use a default.
        // TODO: don't assume this exists.
        setSelectedItem(fill_policy, "lerp");
      } else {
        // User specified fill policy.
        setSelectedItem(downsampler, parts[1].substring(first_dash + 1,
          second_dash));