/// <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(QueryCastExpression expression)
{
CodeExpression argument = this.GenerateCode(expression.Source);
CodeTypeReference type = this.GetTypeReference(expression.TypeToOperateAgainst);
return(argument.Cast(type));
}
/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public QueryValue Visit(QueryCastExpression expression)
{
var source = this.Evaluate(expression.Source);
var type = expression.TypeToOperateAgainst;
return(source.Cast(type));
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">Expression to replace.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(QueryCastExpression expression)
{
var source = this.ReplaceExpression(expression.Source);
if (this.HasChanged(expression.Source, source))
{
return(source.Cast(expression.TypeToOperateAgainst));
}
return(expression);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryCastExpression.
/// </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(QueryCastExpression expression)
{
string argument = this.Convert(expression.Source);
string edmTypeLiteral = this.GetEdmTypeName(expression.TypeToOperateAgainst);
if (string.IsNullOrEmpty(argument))
{
return(string.Format(CultureInfo.InvariantCulture, "cast('{0}')", edmTypeLiteral));
}
return(string.Format(CultureInfo.InvariantCulture, "cast({0}, '{1}')", argument, edmTypeLiteral));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryCastExpression.
/// </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(QueryCastExpression expression)
{
string argument = this.Convert(expression.Source);
string edmTypeLiteral = this.GetEdmTypeName(expression.TypeToOperateAgainst);
if (string.IsNullOrEmpty(argument))
{
return string.Format(CultureInfo.InvariantCulture, "cast('{0}')", edmTypeLiteral);
}
return string.Format(CultureInfo.InvariantCulture, "cast({0}, '{1}')", argument, edmTypeLiteral);
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryCastExpression.
/// </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(QueryCastExpression expression)
{
throw new TaupoNotSupportedException("Not supported");
}
/// <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(QueryCastExpression expression)
{
var source = this.ResolveTypes(expression.Source);
return(source.Cast(expression.TypeToOperateAgainst));
}