/// <summary>
/// Constructs a <see cref="StatusPropertyThresholds"/> instance with the specified thresholds.
/// </summary>
/// <param name="nature">A <see cref="StatusThresholdNature"/> indicating whether or not low values are good.</param>
/// <param name="failVsAlertThreshold">The threshold which divides failures from alerts (at this value it counts as a failure).</param>
/// <param name="alertVsOkayThreshold">The threshold which divides alerts from okays (at this value it counts as an alert).</param>
/// <param name="okayVsSuperlativeThreshold">The threshold which divides okays from superlatives (at this value it counts as an okay). Default is <see cref="StatusThresholdNature.LowIsGood"/>.</param>
public StatusPropertyThresholds(float?failVsAlertThreshold, float?alertVsOkayThreshold, float?okayVsSuperlativeThreshold, StatusThresholdNature nature = StatusThresholdNature.LowIsGood)
{
StatusThresholdNature?computedNature = null;
if (failVsAlertThreshold > alertVsOkayThreshold || alertVsOkayThreshold > okayVsSuperlativeThreshold || failVsAlertThreshold > okayVsSuperlativeThreshold)
{
computedNature = StatusThresholdNature.LowIsGood;
}
if (failVsAlertThreshold < alertVsOkayThreshold || alertVsOkayThreshold < okayVsSuperlativeThreshold || failVsAlertThreshold < okayVsSuperlativeThreshold)
{
if (computedNature != null)
{
throw new ArgumentException("The threshold values must be listed in either ascending or descending order!");
}
computedNature = StatusThresholdNature.HighIsGood;
}
_nature = computedNature ?? nature;
_failVsAlertThreshold = failVsAlertThreshold;
_alertVsOkayThreshold = alertVsOkayThreshold;
_okayVsSuperlativeThreshold = okayVsSuperlativeThreshold;
}
/// <summary>
/// Constructs a default property thresholds attribute instance using the specified parameters.
/// Note that attribute parameters cannot take nullable values, so we use <see cref="Single.NaN"/> instead to indicate that there is no such threshold value.
/// </summary>
/// <param name="propertyPath">The path to the property with a default threshold.</param>
/// <param name="failVsAlertThreshold">The first value that is a failure instead of an alert. <see cref="Single.NaN"/> if there is no such value.</param>
/// <param name="okayVsSuperlativeThreshold">The first value that is an alert instead of okay. <see cref="Single.NaN"/> if there is no such value.</param>
/// <param name="alertVsOkayThreshold">The first value that is okay instead of superlative. <see cref="Single.NaN"/> if there is no such value.</param>
/// <param name="thresholdNature">A <see cref="StatusThresholdNature"/> indicating whether low values are good or bad for this threshold. Only used if less than two threshold values are specified.</param>
public DefaultPropertyThresholdsAttribute(string propertyPath, float failVsAlertThreshold = float.NaN, float alertVsOkayThreshold = float.NaN, float okayVsSuperlativeThreshold = float.NaN, StatusThresholdNature thresholdNature = StatusThresholdNature.HighIsGood)
{
_propertyPath = propertyPath;
_thresholds = new StatusPropertyThresholds(float.IsNaN(failVsAlertThreshold) ? null : (float?)failVsAlertThreshold, float.IsNaN(alertVsOkayThreshold) ? null : (float?)alertVsOkayThreshold, float.IsNaN(okayVsSuperlativeThreshold) ? null : (float?)okayVsSuperlativeThreshold, thresholdNature);
_deferToType = null;
}
