public static ExprValidationException MakeValidationExWExpression(
ExprNodeOrigin origin,
String text,
ExprValidationException ex)
{
return new ExprValidationException(
$"Failed to validate {origin.GetClauseName()} expression {text}: {ex.Message}",
ex);
}
/// <summary>
/// Validates the expression node subtree that has this
/// node as root. Some of the nodes of the tree, including the
/// root, might be replaced in the process.
/// </summary>
/// <param name="origin">validate origin</param>
/// <param name="exprNode">node</param>
/// <param name="validationContext">context</param>
/// <returns>the root node of the validated subtree, possibly different than the root node of the unvalidated subtree
/// </returns>
/// <throws>ExprValidationException when the validation fails</throws>
public static ExprNode GetValidatedSubtree(
ExprNodeOrigin origin,
ExprNode exprNode,
ExprValidationContext validationContext)
{
if (exprNode is ExprLambdaGoesNode) {
return exprNode;
}
try {
return GetValidatedSubtreeInternal(exprNode, validationContext, true);
}
catch (ExprValidationException ex) {
try {
string text;
if (exprNode is ExprSubselectNode subselect) {
text = ExprNodeUtilityMake.GetSubqueryInfoText(subselect);
}
else {
text = ExprNodeUtilityPrint.ToExpressionStringMinPrecedenceSafe(exprNode);
if (text.Length > 40) {
string shortened = text.Substring(0, 35);
text = shortened + "...(" + text.Length + " chars)";
}
text = "'" + text + "'";
}
var errorText = string.Format(
"Failed to validate {0} expression {1}: {2}",
origin.GetClauseName(),
text,
ex.Message);
throw new ExprValidationException(errorText, ex);
}
catch (ExprValidationException) {
throw;
}
catch (EPException) {
throw;
}
catch (Exception rtex) {
Log.Debug("Failed to render nice validation message text: " + rtex.Message, rtex);
// fall through
}
throw;
}
}
private static void ValidatePlainExpression(
ExprNodeOrigin origin,
ExprNode expression,
ExprNodeSummaryVisitor summaryVisitor)
{
expression.Accept(summaryVisitor);
if (summaryVisitor.HasAggregation ||
summaryVisitor.HasSubselect ||
summaryVisitor.HasStreamSelect ||
summaryVisitor.HasPreviousPrior) {
string text = ExprNodeUtilityPrint.ToExpressionStringMinPrecedenceSafe(expression);
throw new ExprValidationException(
"Invalid " +
origin.GetClauseName() +
" expression '" +
text +
"': Aggregation, sub-select, previous or prior functions are not supported in this context");
}
}