/// <summary>
/// This constructor is called by Provider.CreateQuery().
/// </summary>
/// <param name="expression"></param>
public DataQuery(DataQueryProvider provider, Expression expression)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
if (expression == null)
{
throw new ArgumentNullException("expression");
}
if (!typeof(IQueryable <TData>).IsAssignableFrom(expression.Type))
{
throw new ArgumentOutOfRangeException("expression");
}
Provider = provider;
Expression = expression;
}
/// <summary>
/// This constructor is called by the client to create the data source.
/// </summary>
public DataQuery()
{
Provider = new DataQueryProvider();
Expression = Expression.Constant(this);
}
