/// <summary>
/// Validates the specified object instance.
/// </summary>
/// <returns>
/// A value that indicates whether validation was successful or not.
/// </returns>
/// <param name='target'>
/// The target object instance to validate.
/// </param>
/// <param name='failures'>
/// Exposes a collection of the validation failures. If validation is a success this collection will be empty.
/// </param>
/// <exception cref="ArgumentNullException">
/// Thrown if <paramref name="target"/> is null.
/// </exception>
public bool Validate(TTarget target, out ValidationTestList <TTarget> failures)
{
if (target == null)
{
throw new ArgumentNullException("target");
}
failures = new ValidationTestList <TTarget>();
foreach (IValidationTest <TTarget> test in this.Tests)
{
try
{
bool testPassed = test.Execute(target);
if (!testPassed)
{
failures.Add(test);
}
}
catch (Exception ex)
{
failures = new ValidationTestList <TTarget>();
failures.Add(test);
throw new ValidationFailureException <TTarget>(failures, ex);
}
}
return(failures.Count == 0);
}
/// <summary>
/// Gets a subset of the current collection where the failed test(s) have the specified
/// <paramref name="identifier"/> and are for the specified <paramref name="member"/>.
/// </summary>
/// <returns>
/// A collection of validation failures, possibly empty.
/// </returns>
/// <param name='identifier'>
/// The identifier value to search for.
/// </param>
/// <param name='member'>
/// The member that we are interested in.
/// </param>
public ValidationTestList <TTarget> ByIdentifier(object identifier, MemberInfo member)
{
ValidationTestList <TTarget> output = new ValidationTestList <TTarget>();
if (identifier == null && member == null)
{
throw new InvalidOperationException("Both identifier and member cannot be null.");
}
var subset = (from x in this
where
(identifier == null || x.Identifier == identifier) &&
(member == null || x.Member == member)
select x);
output.AddRange(subset);
return(output);
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name='failures'>
/// The collection of validation failures.
/// </param>
public ValidationFailureException(ValidationTestList <TTarget> failures) : this(failures, null)
{
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name='failures'>
/// The collection of validation failures.
/// </param>
/// <param name='inner'>
/// An <see cref="System.Exception"/> that was encountered whilst performing validation.
/// </param>
public ValidationFailureException(ValidationTestList <TTarget> failures, Exception inner) : base(String.Format("Validation failure of a `{0}'",
typeof(TTarget).FullName),
inner)
{
this.Failures = failures;
}
