private static object WalkValue(
EsperEPL2GrammarParser.ElementValueEnumContext ctx,
ImportServiceCompileTime importService)
{
if (ctx.elementValueArrayEnum() != null)
{
return WalkArray(ctx.elementValueArrayEnum(), importService);
}
if (ctx.annotationEnum() != null)
{
return Walk(ctx.annotationEnum(), importService);
}
if (ctx.v != null)
{
return ctx.v.Text;
}
if (ctx.classIdentifier() != null)
{
return WalkClassIdent(ctx.classIdentifier(), importService);
}
return ASTConstantHelper.Parse(ctx.constant());
}
private static object ParseNumOrVariableIdent(
EsperEPL2GrammarParser.NumberconstantContext num,
IToken ident)
{
if (ident != null)
{
return ident.Text;
}
return ASTConstantHelper.Parse(num);
}
public static void AddOptionalNumber(
ExprNode exprNode,
EsperEPL2GrammarParser.NumberContext number)
{
if (number == null)
{
return;
}
ExprConstantNode constantNode = new ExprConstantNodeImpl(ASTConstantHelper.Parse(number));
exprNode.AddChildNode(constantNode);
}
public static object Walk(
CommonTokenStream tokenStream,
EsperEPL2GrammarParser.JsonvalueContext node)
{
if (node.constant() != null) {
EsperEPL2GrammarParser.ConstantContext constCtx = node.constant();
if (constCtx.stringconstant() != null) {
return ExtractString(constCtx.stringconstant().GetText());
}
else {
return ASTConstantHelper.Parse(constCtx.GetChild(0));
}
}
else if (node.jsonobject() != null) {
return WalkObject(tokenStream, node.jsonobject());
}
else if (node.jsonarray() != null) {
return WalkArray(tokenStream, node.jsonarray());
}
throw ASTWalkException.From("Encountered unexpected node type in json tree", tokenStream, node);
}
private static ContextSpec WalkChoice(
EsperEPL2GrammarParser.CreateContextChoiceContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap,
IDictionary<ITree, EvalForgeNode> astPatternNodeMap,
PropertyEvalSpec propertyEvalSpec)
{
// temporal fixed (start+end) and overlapping (initiated/terminated)
if (ctx.START() != null || ctx.INITIATED() != null)
{
ExprNode[] distinctExpressions = null;
if (ctx.createContextDistinct() != null)
{
if (ctx.createContextDistinct().expressionList() == null)
{
distinctExpressions = ExprNodeUtilityQuery.EMPTY_EXPR_ARRAY;
}
else
{
distinctExpressions = ASTExprHelper.ExprCollectSubNodesPerNode(
ctx.createContextDistinct().expressionList().expression(), astExprNodeMap);
}
}
ContextSpecCondition startEndpoint;
if (ctx.START() != null)
{
var immediate = CheckNow(ctx.i);
if (immediate)
{
startEndpoint = ContextSpecConditionImmediate.INSTANCE;
}
else
{
startEndpoint = GetContextCondition(ctx.r1, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, false);
}
}
else
{
var immediate = CheckNow(ctx.i);
startEndpoint = GetContextCondition(ctx.r1, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, immediate);
}
var overlapping = ctx.INITIATED() != null;
var endEndpoint = GetContextCondition(ctx.r2, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, false);
return new ContextSpecInitiatedTerminated(startEndpoint, endEndpoint, overlapping, distinctExpressions);
}
// partitioned
if (ctx.PARTITION() != null)
{
IList<EsperEPL2GrammarParser.CreateContextPartitionItemContext> partitions = ctx.createContextPartitionItem();
IList<ContextSpecKeyedItem> rawSpecs = new List<ContextSpecKeyedItem>();
foreach (var partition in partitions)
{
var filterSpec = ASTFilterSpecHelper.WalkFilterSpec(partition.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
propertyEvalSpec = null;
IList<string> propertyNames = new List<string>();
IList<EsperEPL2GrammarParser.ChainableContext> properties = partition.chainable();
foreach (var property in properties)
{
var propertyName = ASTUtil.GetPropertyName(property, 0);
propertyNames.Add(propertyName);
}
ASTExprHelper.ExprCollectSubNodes(partition, 0, astExprNodeMap); // remove expressions
rawSpecs.Add(
new ContextSpecKeyedItem(
filterSpec, propertyNames, partition.keywordAllowedIdent() == null ? null : partition.keywordAllowedIdent().GetText()));
}
IList<ContextSpecConditionFilter> optionalInit = null;
if (ctx.createContextPartitionInit() != null)
{
optionalInit = GetContextPartitionInit(ctx.createContextPartitionInit().createContextFilter(), astExprNodeMap);
}
ContextSpecCondition optionalTermination = null;
if (ctx.createContextPartitionTerm() != null)
{
optionalTermination = GetContextCondition(
ctx.createContextPartitionTerm().createContextRangePoint(), astExprNodeMap, astPatternNodeMap, propertyEvalSpec, false);
}
return new ContextSpecKeyed(rawSpecs, optionalInit, optionalTermination);
}
if (ctx.COALESCE() != null)
{
// hash
IList<EsperEPL2GrammarParser.CreateContextCoalesceItemContext> coalesces = ctx.createContextCoalesceItem();
IList<ContextSpecHashItem> rawSpecs = new List<ContextSpecHashItem>(coalesces.Count);
foreach (var coalesce in coalesces)
{
var chain = ASTChainSpecHelper.GetChainables(coalesce.chainable(), astExprNodeMap);
var func = chain[0];
var filterSpec = ASTFilterSpecHelper.WalkFilterSpec(coalesce.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
propertyEvalSpec = null;
rawSpecs.Add(new ContextSpecHashItem(func, filterSpec));
}
var granularity = ctx.g.Text;
if (!granularity.ToLowerInvariant().Equals("granularity"))
{
throw ASTWalkException.From("Expected 'granularity' keyword after list of coalesce items, found '" + granularity + "' instead");
}
var num = ASTConstantHelper.Parse(ctx.number());
var preallocateStr = ctx.p?.Text;
if (preallocateStr != null && !preallocateStr.ToLowerInvariant().Equals("preallocate"))
{
throw ASTWalkException.From(
"Expected 'preallocate' keyword after list of coalesce items, found '" + preallocateStr + "' instead");
}
if (!num.GetType().IsNumericNonFP() || num.GetType().GetBoxedType() == typeof(long?))
{
throw ASTWalkException.From("Granularity provided must be an int-type number, received " + num.GetType() + " instead");
}
return new ContextSpecHash(rawSpecs, num.AsInt32(), preallocateStr != null);
}
// categorized
if (ctx.createContextGroupItem() != null)
{
IList<EsperEPL2GrammarParser.CreateContextGroupItemContext> grps = ctx.createContextGroupItem();
IList<ContextSpecCategoryItem> items = new List<ContextSpecCategoryItem>();
foreach (var grp in grps)
{
var exprNode = ASTExprHelper.ExprCollectSubNodes(grp, 0, astExprNodeMap)[0];
var name = grp.i.Text;
items.Add(new ContextSpecCategoryItem(exprNode, name));
}
var filterSpec = ASTFilterSpecHelper.WalkFilterSpec(ctx.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
return new ContextSpecCategory(items, filterSpec);
}
throw new IllegalStateException("Unrecognized context detail type");
}
public static OutputLimitSpec BuildOutputLimitSpec(
CommonTokenStream tokenStream,
EsperEPL2GrammarParser.OutputLimitContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
var displayLimit = OutputLimitLimitType.DEFAULT;
if (ctx.k != null)
{
switch (ctx.k.Type)
{
case EsperEPL2GrammarParser.FIRST:
displayLimit = OutputLimitLimitType.FIRST;
break;
case EsperEPL2GrammarParser.LAST:
displayLimit = OutputLimitLimitType.LAST;
break;
case EsperEPL2GrammarParser.SNAPSHOT:
displayLimit = OutputLimitLimitType.SNAPSHOT;
break;
case EsperEPL2GrammarParser.ALL:
displayLimit = OutputLimitLimitType.ALL;
break;
default:
throw ASTWalkException.From("Encountered unrecognized token " + ctx.k.Text, tokenStream, ctx);
}
}
// next is a variable, or time period, or number
string variableName = null;
double? rate = null;
ExprNode whenExpression = null;
IList<ExprNode> crontabScheduleSpec = null;
IList<OnTriggerSetAssignment> thenExpressions = null;
ExprTimePeriod timePeriodExpr = null;
OutputLimitRateType rateType;
ExprNode andAfterTerminateExpr = null;
IList<OnTriggerSetAssignment> andAfterTerminateSetExpressions = null;
if (ctx.t != null)
{
rateType = OutputLimitRateType.TERM;
if (ctx.expression() != null)
{
andAfterTerminateExpr = ASTExprHelper.ExprCollectSubNodes(ctx.expression(), 0, astExprNodeMap)[0];
}
if (ctx.onSetExpr() != null)
{
andAfterTerminateSetExpressions = ASTExprHelper.GetOnTriggerSetAssignments(ctx.onSetExpr().onSetAssignmentList(), astExprNodeMap);
}
}
else if (ctx.wh != null)
{
rateType = OutputLimitRateType.WHEN_EXPRESSION;
whenExpression = ASTExprHelper.ExprCollectSubNodes(ctx.expression(), 0, astExprNodeMap)[0];
if (ctx.onSetExpr() != null)
{
thenExpressions = ASTExprHelper.GetOnTriggerSetAssignments(ctx.onSetExpr().onSetAssignmentList(), astExprNodeMap);
}
}
else if (ctx.at != null)
{
rateType = OutputLimitRateType.CRONTAB;
crontabScheduleSpec = ASTExprHelper.ExprCollectSubNodes(ctx.crontabLimitParameterSet(), 0, astExprNodeMap);
}
else
{
if (ctx.ev != null)
{
rateType = ctx.e != null ? OutputLimitRateType.EVENTS : OutputLimitRateType.TIME_PERIOD;
if (ctx.i != null)
{
variableName = ctx.i.Text;
}
else if (ctx.timePeriod() != null)
{
timePeriodExpr = (ExprTimePeriod) ASTExprHelper.ExprCollectSubNodes(ctx.timePeriod(), 0, astExprNodeMap)[0];
}
else
{
ASTExprHelper.ExprCollectSubNodes(ctx.number(), 0, astExprNodeMap); // remove
rate = ctx.number().GetText().AsDouble();
}
}
else
{
rateType = OutputLimitRateType.AFTER;
}
}
// get the AFTER time period
ExprTimePeriod afterTimePeriodExpr = null;
int? afterNumberOfEvents = null;
if (ctx.outputLimitAfter() != null)
{
if (ctx.outputLimitAfter().timePeriod() != null)
{
ExprNode expression = ASTExprHelper.ExprCollectSubNodes(ctx.outputLimitAfter(), 0, astExprNodeMap)[0];
afterTimePeriodExpr = (ExprTimePeriod) expression;
}
else
{
var constant = ASTConstantHelper.Parse(ctx.outputLimitAfter().number());
afterNumberOfEvents = constant.AsInt32();
}
}
var andAfterTerminate = false;
if (ctx.outputLimitAndTerm() != null)
{
andAfterTerminate = true;
if (ctx.outputLimitAndTerm().expression() != null)
{
andAfterTerminateExpr = ASTExprHelper.ExprCollectSubNodes(ctx.outputLimitAndTerm().expression(), 0, astExprNodeMap)[0];
}
if (ctx.outputLimitAndTerm().onSetExpr() != null)
{
andAfterTerminateSetExpressions = ASTExprHelper.GetOnTriggerSetAssignments(
ctx.outputLimitAndTerm().onSetExpr().onSetAssignmentList(), astExprNodeMap);
}
}
return new OutputLimitSpec(
rate, variableName, rateType, displayLimit, whenExpression, thenExpressions, crontabScheduleSpec, timePeriodExpr, afterTimePeriodExpr,
afterNumberOfEvents, andAfterTerminate, andAfterTerminateExpr, andAfterTerminateSetExpressions);
}
