/// <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(LinqSkipExpression expression)
{
CodeExpression source = this.GenerateCode(expression.Source);
CodeExpression skipCount = this.GenerateCode(expression.SkipCount);
return(source.Call("Skip", skipCount));
}
/// <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(LinqSkipExpression expression)
{
var source = this.ResolveTypes(expression.Source);
var skipCount = this.ResolveTypes(expression.SkipCount);
return(new LinqSkipExpression(source, skipCount, source.ExpressionType));
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public override QueryValue Visit(LinqSkipExpression expression)
{
return(this.VisitCollectionElementPrimitiveOrComplexTypeError(
expression,
delegate
{
return base.Visit(expression);
}));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QuerySkipExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(LinqSkipExpression expression)
{
string source = this.ComputeUriInternal(expression.Source);
var skipCount = this.ExpressionConverter.Convert(expression.SkipCount);
this.SetSkipQueryOption(skipCount);
this.hasQueryOption = true;
return(source);
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(LinqSkipExpression expression)
{
QueryExpression source = this.ReplaceExpression(expression.Source);
QueryExpression skipCount = this.ReplaceExpression(expression.SkipCount);
if (HasChanged(expression.Source, source) || HasChanged(expression.SkipCount, skipCount))
{
return(new LinqSkipExpression(source, skipCount, expression.ExpressionType));
}
return(expression);
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public virtual QueryValue Visit(LinqSkipExpression expression)
{
var source = this.EvaluateCollection(expression.Source);
var skipCount = this.Evaluate(expression.SkipCount) as QueryScalarValue;
if (skipCount == null)
{
throw new TaupoInvalidOperationException("Skip count expression must be a primitive.");
}
return(source.Skip(skipCount));
}
/// <summary>
/// Filters the specified expression. Skip skip expression.
/// </summary>
/// <param name="expression">The expression to filter.</param>
/// <returns>The filtered expression</returns>
public override QueryExpression Visit(LinqSkipExpression expression)
{
return(expression.Source.Accept(this));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QuerySkipExpression.
/// </summary>
/// <param name="expression">The root node of the expression tree being visited.</param>
/// <returns>Uri query string representing the expression.</returns>
public override string Visit(LinqSkipExpression expression)
{
string source = this.ComputeUriInternal(expression.Source);
var skipCount = this.ExpressionConverter.Convert(expression.SkipCount);
this.SetSkipQueryOption(skipCount);
this.hasQueryOption = true;
return source;
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the LinqSkipExpression.
/// </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(LinqSkipExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
