/// <summary>
/// Execute the switch statement. Optionally ensure that one case statement was satisfied.
/// </summary>
private static void Do(object value, bool guaranteeHandling, SwitchCase[] cases)
{
#region Input Validation
Insist.IsNotNull(cases, "cases");
Insist.AllItemsAreNotNull(cases, "cases");
Insist.ContainsAtLeast(cases, 1, "cases");
EnsureDefaultIsNotTheOnlyCase(cases);
EnsureSingleDefaultCase(cases);
EnsureDefaultIsLastCase(cases);
EnsureFallThroughCaseIsNotTheLastCase(cases);
#endregion
CopyActionsToFallThroughCases(cases);
bool handled = false;
foreach (SwitchCase c in cases)
{
if (c.IsDefaultCase ||
object.Equals(value, c.ValueToTest))
{
c.ActionToPerform();
handled = true;
break;
}
}
if (guaranteeHandling == true &&
handled == false)
{
throw new InvalidOperationException("No cases in this switch statement have been satisfied.");
}
}
/// <summary>
/// Construct a new Failure OperationResult with the supplied list of error messages
/// </summary>
/// <param name="errorMessages">
/// The collection of error messages that indicate why the operation failed
/// </param>
/// <exception cref="System.ArgumentNullException">
/// Throw if
/// errorMessages is null
/// errorMessages contains a null element
/// </exception>
/// <exception cref="System.ArgumentException">
/// Throw if
/// errorMessages contains no elements
/// </exception>
public OperationResult(ICollection <string> errorMessages)
{
#region Input Validation
Insist.IsNotNull(errorMessages, "errorMessages");
Insist.ContainsAtLeast(errorMessages, 1, "errorMessages");
Insist.AllItemsAreNotNull(errorMessages, "errorMessages");
#endregion
_success = false;
_errorMessages = new List <string>();
_errorMessages.AddRange(errorMessages);
}
/// <summary>
/// Ensures that the collection contains at least the number of specified items
/// </summary>
/// <param name="collection">
/// The collection to be validated.
/// </param>
/// <param name="minNumberOfItems">
/// The minimum number of items that the collection must have
/// </param>
/// <param name="argumentName">
/// The argument name.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// If the collection itself is null
/// </exception>
/// <exception cref="System.ArgumentException">
/// If the collection contains less than the minumum number of items. OR. the minNumberOfItems
/// argument is less than zero.
/// </exception>
public static void ContainsAtLeast <T>(IEnumerable <T> collection, int minNumberOfItems, string argumentName)
{
Insist.ContainsAtLeast(collection, minNumberOfItems, argumentName, null);
}
