/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public QueryValue Visit(LinqMinExpression expression)
{
return(this.EvaluateQueryMethodWithLambdaExpression <QueryScalarValue>(
expression,
c => c.Min(),
(c, lambda) => c.Min(lambda)));
}
/// <summary>
/// Resolves types for the specified expression.
/// </summary>
/// <param name="expression">The expression to resolve types for.</param>
/// <returns>Expression with resolved types.</returns>
public QueryExpression Visit(LinqMinExpression expression)
{
var source = this.ResolveTypes(expression.Source);
var sourceType = ValidateSourceIsACollection(source);
var lambda = expression.Lambda != null?this.ResolveLambdaTypes(expression.Lambda, sourceType) : null;
var expressionType = lambda != null ? lambda.Body.ExpressionType : sourceType.ElementType;
ExceptionUtilities.Assert(expressionType is QueryScalarType, "Min expression without predicate can only be applied on collections of scalars.");
return(new LinqMinExpression(source, lambda, expressionType));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the LinqMinExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public virtual string Visit(LinqMinExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
/// <summary>
/// Generates System.CodeDom.CodeExpression from the given expression.
/// </summary>
/// <param name="expression">Expression from which System.CodeDom.CodeExpression is generated.</param>
/// <returns>Generated System.CodeDom.CodeExpression.</returns>
public virtual CodeExpression Visit(LinqMinExpression expression)
{
return(this.VisitQueryMethodWithLambdaExpression(expression, "Min"));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the LinqMinExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(LinqMinExpression expression)
{
return(this.VisitQueryMethodWithLambdaExpression(expression, (s, l, t) => new LinqMinExpression(s, l, t)));
}
