/// <summary>
/// Gets a double from an object whose runtime type can be converted to one and throws an exception otherwise.
/// </summary>
/// <param name="rule">The object this method is called on.</param>
/// <param name="value">The object to extract the value from.</param>
/// <returns>The value as a double.</returns>
/// <exception cref="InvalidRuleException">Thrown if value is null or its runtime type is not compatible with a double.</exception>
internal static double GetFromDoubleCompatible(this AttributeRule rule, object value)
{
return(ValueUtil.GetFromDoubleCompatible(rule.GetType(), value));
}
/// <summary>
/// Gets a DateTime from an object and an exception is thrown if the boxed value is not a DateTime.
/// </summary>
/// <param name="rule">The object this method is called on.</param>
/// <param name="value">The object to extract the value from.</param>
/// <returns>The value as a DateTime.</returns>
/// <exception cref="InvalidRuleException">Thrown if value's runtime type is not DateTime.</exception>
internal static DateTime GetFromDateTime(this AttributeRule rule, object value)
{
return(ValueUtil.GetFromDateTime(rule.GetType(), value));
}
/// <summary>
/// Gets a string from an object whose runtime type is string and throws an exception otherwise.
/// </summary>
/// <remarks>If value is null, no check is performed and null is returned.</remarks>
/// <param name="rule">The object this method is called on.</param>
/// <param name="value">The object to extract the value from.</param>
/// <returns>The value as a string.</returns>
/// <exception cref="InvalidRuleException">Thrown if value's runtime type is not a string.</exception>
internal static string GetFromString(this AttributeRule rule, object value)
{
return(ValueUtil.GetFromString(rule.GetType(), value));
}