/// <summary>
/// Evaluates the specified expression.
/// </summary>
/// <param name="expression">The expression to evaluate.</param>
/// <returns>Value of the expression.</returns>
public virtual QueryValue Visit(QueryEqualToExpression expression)
{
// This for cases like ComplexType = null
if (expression.Left.ExpressionType is QueryStructuralType)
{
QueryStructuralValue left, right;
this.EvaluateBinaryArguments(expression, out left, out right);
return(left.EqualTo(right));
}
else if (expression.Left.ExpressionType is QueryReferenceType)
{
QueryReferenceValue left, right;
this.EvaluateBinaryArguments(expression, out left, out right);
return(left.EqualTo(right));
}
else if (expression.Left.ExpressionType is QueryScalarType)
{
QueryScalarValue left, right;
this.EvaluateBinaryArguments(expression, out left, out right);
return(left.EqualTo(right));
}
else
{
throw new TaupoNotSupportedException("Equality on type" + expression.Left.ExpressionType.ToString() + " is not supported");
}
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryEqualToExpression.
/// </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(QueryEqualToExpression expression)
{
return this.VisitBinaryExpession(expression, "{0} eq {1}");
}
/// <summary>
/// Replaces the given expression.
/// </summary>
/// <param name="expression">Expression to replace.</param>
/// <returns>Replaced expression.</returns>
public virtual QueryExpression Visit(QueryEqualToExpression expression)
{
return(this.VisitBinaryExpression(expression, CommonQueryBuilder.EqualTo));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryEqualToExpression.
/// </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(QueryEqualToExpression 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(QueryEqualToExpression expression)
{
return(this.VisitBinaryExpressionWithBooleanResult(expression, CommonQueryBuilder.EqualTo));
}
/// <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(QueryEqualToExpression expression)
{
return(this.VisitBinaryExpression(expression, CodeBinaryOperatorType.ValueEquality));
}
/// <summary>
/// Visits a QueryExpression tree whose root node is the QueryEqualToExpression.
/// </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(QueryEqualToExpression expression)
{
return(this.VisitBinaryExpession(expression, "{0} eq {1}"));
}