public override void Attach(
EventType parentEventType,
int streamNumber,
ViewForgeEnv viewForgeEnv)
{
eventType = parentEventType;
var message =
NAME + " window requires a numeric size parameter and a list of expressions providing sort keys";
if (viewParameters.Count < 2) {
throw new ViewParameterException(message);
}
var validated = ViewForgeSupport.Validate(
NAME + " window",
parentEventType,
viewParameters,
true,
viewForgeEnv,
streamNumber);
for (var i = 1; i < validated.Length; i++) {
ViewForgeSupport.AssertReturnsNonConstant(NAME + " window", validated[i], i);
}
ViewForgeSupport.ValidateNoProperties(ViewName, validated[0], 0);
sizeForge = ViewForgeSupport.ValidateSizeParam(ViewName, validated[0], 0);
sortCriteriaExpressions = new ExprNode[validated.Length - 1];
isDescendingValues = new bool[sortCriteriaExpressions.Length];
for (var i = 1; i < validated.Length; i++) {
if (validated[i] is ExprOrderedExpr) {
isDescendingValues[i - 1] = ((ExprOrderedExpr) validated[i]).IsDescending;
sortCriteriaExpressions[i - 1] = validated[i].ChildNodes[0];
}
else {
sortCriteriaExpressions[i - 1] = validated[i];
}
}
sortSerdes = viewForgeEnv.SerdeResolver.SerdeForDataWindowSortCriteria(
ExprNodeUtilityQuery.GetExprResultTypes(sortCriteriaExpressions),
viewForgeEnv.StatementRawInfo);
}
public override void Attach(
EventType parentEventType,
int streamNumber,
ViewForgeEnv viewForgeEnv)
{
eventType = parentEventType;
var message =
NAME +
" view requires a list of expressions providing unique keys, a numeric size parameter and a list of expressions providing sort keys";
if (viewParameters.Count < 3) {
throw new ViewParameterException(message);
}
// validate
var validated = ViewForgeSupport.Validate(
NAME,
parentEventType,
viewParameters,
true,
viewForgeEnv,
streamNumber);
// find size-parameter index
var indexNumericSize = -1;
for (var i = 0; i < validated.Length; i++) {
if (validated[i] is ExprConstantNode || validated[i] is ExprContextPropertyNode) {
indexNumericSize = i;
break;
}
}
if (indexNumericSize == -1) {
throw new ViewParameterException("Failed to find constant value for the numeric size parameter");
}
if (indexNumericSize == 0) {
throw new ViewParameterException(
"Failed to find unique value expressions that are expected to occur before the numeric size parameter");
}
if (indexNumericSize == validated.Length - 1) {
throw new ViewParameterException(
"Failed to find sort key expressions after the numeric size parameter");
}
// validate non-constant for unique-keys and sort-keys
for (var i = 0; i < indexNumericSize; i++) {
ViewForgeSupport.AssertReturnsNonConstant(NAME, validated[i], i);
}
for (var i = indexNumericSize + 1; i < validated.Length; i++) {
ViewForgeSupport.AssertReturnsNonConstant(NAME, validated[i], i);
}
// get sort size
ViewForgeSupport.ValidateNoProperties(ViewName, validated[indexNumericSize], indexNumericSize);
sizeForge = ViewForgeSupport.ValidateSizeParam(ViewName, validated[indexNumericSize], indexNumericSize);
// compile unique expressions
criteriaExpressions = new ExprNode[indexNumericSize];
Array.Copy(validated, 0, criteriaExpressions, 0, indexNumericSize);
// compile sort expressions
sortCriteriaExpressions = new ExprNode[validated.Length - indexNumericSize - 1];
isDescendingValues = new bool[sortCriteriaExpressions.Length];
var count = 0;
for (var i = indexNumericSize + 1; i < validated.Length; i++) {
if (validated[i] is ExprOrderedExpr) {
isDescendingValues[count] = ((ExprOrderedExpr) validated[i]).IsDescending;
sortCriteriaExpressions[count] = validated[i].ChildNodes[0];
}
else {
sortCriteriaExpressions[count] = validated[i];
}
count++;
}
sortSerdes = viewForgeEnv.SerdeResolver.SerdeForDataWindowSortCriteria(
ExprNodeUtilityQuery.GetExprResultTypes(sortCriteriaExpressions),
viewForgeEnv.StatementRawInfo);
}
