public override NLinq.Expressions.Expression Visit(NLinq.Expressions.MemberExpression expression)
{
if (inWhere)
{
Visit(expression.Previous);
Visit(expression.Statement);
}
else if (inFrom)
{
Visit(expression.Previous);
if (currentProperty.Target != null)
throw new NotSupportedException();
currentProperty.Target = new PropertyExpression();
currentProperty = currentProperty.Target;
Visit(expression.Statement);
}
else
{
if (uri.Filter != null || uri.Expand != null || uri.InLineCount != null || uri.Top != null || uri.Skip != null || uri.Select != null)
return expression;
currentProperty.Target = new PropertyExpression();
currentProperty = currentProperty.Target;
Visit(expression.Statement);
}
return expression;
}
public override NLinq.Expressions.QueryBodyClause Visit(NLinq.Expressions.FromClause expression)
{
if (!inQueryBodyClauses)
{
uri = new RootContainerExpression() { Type = expression.Type };
identifiers.Add(expression.Identifier.Text, uri);
}
else
{
inFrom = true;
currentProperty = new PropertyExpression();
identifiers.Add(expression.Identifier.Text, currentProperty);
Visit(expression.Expression);
inFrom = false;
}
return expression;
}
protected override NLinq.Expressions.Identifier VisitIdentifier(NLinq.Expressions.Identifier identifier)
{
if (inWhere)
{
PropertyExpression currentProperty;
if (identifiers.TryGetValue(identifier.Text, out currentProperty))
this.currentProperty = currentProperty;
else
{
constraintBuilder.Append(identifier.Text);
}
}
else
{
if (string.IsNullOrEmpty(currentProperty.Name))
currentProperty.Name = identifier.Text;
else
throw new NotSupportedException();
}
return identifier;
}