public void TransformExpressions ()
{
var oldExpression = ExpressionHelper.CreateExpression ();
var newExpression = ExpressionHelper.CreateExpression ();
var clause = new MainFromClause ("x", typeof (Cook), oldExpression);
clause.TransformExpressions (ex =>
{
Assert.That (ex, Is.SameAs (oldExpression));
return newExpression;
});
Assert.That (clause.FromExpression, Is.SameAs (newExpression));
}
public override void VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
{
base.VisitMainFromClause(fromClause, queryModel);
ResultOperatorExpressionRewriter rewriter = new ResultOperatorExpressionRewriter();
fromClause.TransformExpressions(rewriter.Rewrite);
if (fromClause.FromExpression.NodeType == ExpressionType.Constant)
{
System.Type expressionType = queryModel.MainFromClause.FromExpression.Type;
if (expressionType.IsGenericType && expressionType.GetGenericTypeDefinition() == typeof(NhQueryable<>))
{
queryModel.MainFromClause.ItemType = expressionType.GetGenericArguments()[0];
}
}
this.resultOperators.AddRange(rewriter.ResultOperators);
this.evaluationType = rewriter.EvaluationType;
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public override void VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
=> fromClause.TransformExpressions(TransformingVisitor.Visit);