public void ThrowIf(LambdaExpression condition, string message)
{
if (condition == null)
{
throw new ArgumentNullException("condition");
}
if (condition.Parameters.Count != 1 || condition.Parameters.Single().Type != type)
{
throw new InvalidOperationException("Invalid expression parameters");
}
if (condition.ReturnType != typeof(bool))
{
throw new InvalidOperationException("Invalid return type, must be bool");
}
var data = new TypeModifierData
{
Type = type,
Message = message,
ThrowIfCondition = condition
};
mapper.Data.AddTypeModifierData(data, MappingSides.Source);
}
public void ThrowIf(LambdaExpression condition, string message)
{
if (condition == null) throw new ArgumentNullException("condition");
if (condition.Parameters.Count != 1 || condition.Parameters.Single().Type != type)
{
throw new InvalidOperationException("Invalid expression parameters");
}
if (condition.ReturnType != typeof(bool))
{
throw new InvalidOperationException("Invalid return type, must be bool");
}
var data = new TypeModifierData
{
Type = type,
Message = message,
ThrowIfCondition = condition
};
mapper.Data.AddTypeModifierData(data, MappingSides.Source);
}
private Expression ProcessTypeModifierData(TypeModifierData data, Expression typeParam)
{
if (data.ThrowIfCondition != null)
{
var param = data.ThrowIfCondition.Parameters.Single();
mapProcessor.ParametersToReplace.Add(new ExpressionTuple(param, typeParam));
var message = Expression.Constant(data.Message);
var throwException = Expression.Throw(Expression.New(typeof(MappingTerminatedException).GetConstructor(new[] { typeof(string) }), message));
var ifNotConditionThrow = Expression.IfThen(data.ThrowIfCondition.Body, throwException);
return ifNotConditionThrow;
}
return null;
}
