public ITargetTypeExpression <TMessage, TCommand> Rule <T>() where T : IValidationRule
{
var instance = new ValidationRuleInstance {
ValidationRuleType = typeof(T)
};
_instances.Add(instance);
return(ForMessage());
}
public ITargetTypeExpression <TMessage, TCommand> Rule <T>(Expression <Func <TCommand, object> > toCheck)
where T : IValidationRule
{
var instance = new ValidationRuleInstance {
ValidationRuleType = typeof(T), ToCheckExpression = toCheck
};
FillUIExpression(toCheck, instance);
_instances.Add(instance);
instance.ArrayRule = toCheck.IsArray();
return(this);
}
public ITargetTypeExpression <TMessage, TCommand> Rule <T>(Expression <Func <TCommand, object> > toCheck,
Expression <Func <TCommand, object> > toCompare)
where T : ICrossReferencedValidationRule
{
var instance = new ValidationRuleInstance
{
ValidationRuleType = typeof(T),
ToCheckExpression = toCheck,
ToCompareExpression = toCompare
};
FillUIExpression(toCompare, instance);
_instances.Add(instance);
return(this);
}
private static void FillUIExpression <TTarget>(Expression <Func <TCommand, TTarget> > toCheck,
ValidationRuleInstance instance)
{
var member = toCheck.GetMember();
if (member == null)
{
return;
}
var destinationMember = typeof(TMessage).GetProperty(member.Name);
if (destinationMember == null)
{
return;
}
if ((member.GetMemberType() == typeof(DateTime?)) &&
(typeof(IDateAndTime).IsAssignableFrom(destinationMember.PropertyType)))
{
var dateProperty = destinationMember.PropertyType.GetProperty("Date",
BindingFlags.Public | BindingFlags.Instance);
var instanceParameter = Expression.Parameter(typeof(TMessage), "target");
var memberExpr = Expression.Property(instanceParameter, destinationMember);
var dateGetterExpression = Expression.Property(memberExpr, dateProperty);
var lambda = Expression.Lambda <Func <TMessage, object> >(dateGetterExpression,
instanceParameter);
instance.UIAttributeExpression = lambda;
}
else
{
var instanceParameter = Expression.Parameter(typeof(TMessage), "target");
var memberExpr = Expression.Property(instanceParameter, destinationMember);
var lambda =
Expression.Lambda <Func <TMessage, object> >(Expression.Convert(memberExpr, typeof(object)), instanceParameter);
instance.UIAttributeExpression = lambda;
}
}
private static void FillUIExpression(Expression <Func <TCommand, object> > toCheck, ValidationRuleInstance instance)
{
FillUIExpression <object>(toCheck, instance);
}
