/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public QueryValue Visit(QueryAndExpression expression)
{
QueryScalarValue left, right;
this.EvaluateBinaryArguments(expression, out left, out right);
// short circuit "And" logic if left is false (and evaluation did not throw any exceptions)
// TODO: this is sort of a hack, we should have more solid way of check whether given EvaluationError is actual exception or just list of ingnorable exceptions
bool leftThrewEvaluationException = left.EvaluationError != null && !string.IsNullOrEmpty(left.EvaluationError.ToString());
if (!left.IsNull && (bool)left.Value == false && !leftThrewEvaluationException)
{
return(left);
}
return(left.AndAlso(right));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAndExpression.
/// </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(QueryAndExpression expression)
{
return this.VisitBinaryExpession(expression, "{0} and {1}");
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">Expression to replace.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(QueryAndExpression expression)
{
return(this.VisitBinaryExpression(expression, CommonQueryBuilder.And));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAndExpression.
/// </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(QueryAndExpression 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(QueryAndExpression expression)
{
return(this.VisitBinaryExpressionWithBooleanResult(expression, CommonQueryBuilder.And));
}
/// <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(QueryAndExpression expression)
{
return(this.VisitBinaryExpression(expression, CodeBinaryOperatorType.BooleanAnd));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryAndExpression.
/// </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(QueryAndExpression expression)
{
return(this.VisitBinaryExpession(expression, "{0} and {1}"));
}