private static ExprChainedSpec GetLibFunctionChainSpec(ASTLibModelChainElement element, IDictionary <ITree, ExprNode> astExprNodeMap)
{
var methodName = ASTConstantHelper.RemoveTicks(element.FuncName);
var parameters = ASTLibFunctionHelper.GetExprNodesLibFunc(element.Args, astExprNodeMap);
return(new ExprChainedSpec(methodName, parameters, !element.HasLeftParen));
}
private static Object WalkValue(
EsperEPL2GrammarParser.ElementValueEnumContext ctx,
EngineImportService engineImportService)
{
if (ctx.elementValueArrayEnum() != null)
{
return(WalkArray(ctx.elementValueArrayEnum(), engineImportService));
}
if (ctx.annotationEnum() != null)
{
return(Walk(ctx.annotationEnum(), engineImportService));
}
else if (ctx.v != null)
{
return(ctx.v.Text);
}
else if (ctx.classIdentifier() != null)
{
return(WalkClassIdent(ctx.classIdentifier(), engineImportService));
}
else
{
return(ASTConstantHelper.Parse(ctx.constant()));
}
}
public static ExprChainedSpec GetLibFunctionChainSpec(EsperEPL2GrammarParser.LibFunctionNoClassContext ctx, IDictionary <ITree, ExprNode> astExprNodeMap)
{
var methodName = ASTConstantHelper.RemoveTicks(ctx.funcIdentChained().GetText());
var parameters = GetExprNodesLibFunc(ctx.libFunctionArgs(), astExprNodeMap);
var property = ctx.l == null;
return(new ExprChainedSpec(methodName, parameters, property));
}
public static void AddOptionalNumber(ExprNode exprNode, EsperEPL2GrammarParser.NumberContext number)
{
if (number == null)
{
return;
}
ExprConstantNode constantNode = new ExprConstantNodeImpl(ASTConstantHelper.Parse(number));
exprNode.AddChildNode(constantNode);
}
private static Object ParseNumOrVariableIdent(EsperEPL2GrammarParser.NumberconstantContext num, IToken ident)
{
if (ident != null)
{
return(ident.Text);
}
else
{
return(ASTConstantHelper.Parse(num));
}
}
/// <summary>
/// Walk an annotation root name or child node (nested annotations).
/// </summary>
/// <param name="node">annotation walk node</param>
/// <returns>annotation descriptor</returns>
/// <throws>com.espertech.esper.epl.parse.ASTWalkException if the walk failed</throws>
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);
}
/// <summary>
/// Build an output limit spec from the AST node supplied.
/// </summary>
/// <param name="astExprNodeMap">is the map of current AST tree nodes to their respective expression root node</param>
/// <param name="engineURI">the engine uri</param>
/// <param name="timeProvider">provides time</param>
/// <param name="variableService">provides variable resolution</param>
/// <param name="exprEvaluatorContext">context for expression evaluatiom</param>
/// <returns>output limit spec</returns>
public static OutputLimitSpec BuildOutputLimitSpec(
CommonTokenStream tokenStream,
EsperEPL2GrammarParser.OutputLimitContext ctx,
IDictionary <ITree, ExprNode> astExprNodeMap,
VariableService variableService,
String engineURI,
TimeProvider timeProvider,
ExprEvaluatorContext exprEvaluatorContext)
{
OutputLimitLimitType 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 = Double.Parse(ctx.number().GetText());
}
}
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
{
Object constant = ASTConstantHelper.Parse(ctx.outputLimitAfter().number());
afterNumberOfEvents = constant.AsInt();
}
}
bool 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));
}
private static ContextDetail WalkChoice(EsperEPL2GrammarParser.CreateContextChoiceContext ctx, IDictionary <ITree, ExprNode> astExprNodeMap, IDictionary <ITree, EvalFactoryNode> astPatternNodeMap, PropertyEvalSpec propertyEvalSpec, FilterSpecRaw filterSpec)
{
// 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 = new ExprNode[0];
}
else
{
distinctExpressions = ASTExprHelper.ExprCollectSubNodesPerNode(ctx.createContextDistinct().expressionList().expression(), astExprNodeMap);
}
}
ContextDetailCondition startEndpoint;
if (ctx.START() != null)
{
bool immediate = CheckNow(ctx.i);
if (immediate)
{
startEndpoint = new ContextDetailConditionImmediate();
}
else
{
startEndpoint = GetContextCondition(ctx.r1, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, false);
}
}
else
{
bool immediate = CheckNow(ctx.i);
startEndpoint = GetContextCondition(ctx.r1, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, immediate);
}
bool overlapping = ctx.INITIATED() != null;
ContextDetailCondition endEndpoint = GetContextCondition(ctx.r2, astExprNodeMap, astPatternNodeMap, propertyEvalSpec, false);
return(new ContextDetailInitiatedTerminated(startEndpoint, endEndpoint, overlapping, distinctExpressions));
}
// partitioned
if (ctx.PARTITION() != null)
{
IList <EsperEPL2GrammarParser.CreateContextPartitionItemContext> partitions = ctx.createContextPartitionItem();
IList <ContextDetailPartitionItem> rawSpecs = new List <ContextDetailPartitionItem>();
foreach (EsperEPL2GrammarParser.CreateContextPartitionItemContext partition in partitions)
{
filterSpec = ASTFilterSpecHelper.WalkFilterSpec(partition.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
propertyEvalSpec = null;
IList <String> propertyNames = new List <String>();
IList <EsperEPL2GrammarParser.EventPropertyContext> properties = partition.eventProperty();
foreach (EsperEPL2GrammarParser.EventPropertyContext property in properties)
{
String propertyName = ASTUtil.GetPropertyName(property, 0);
propertyNames.Add(propertyName);
}
ASTExprHelper.ExprCollectSubNodes(partition, 0, astExprNodeMap); // remove expressions
rawSpecs.Add(new ContextDetailPartitionItem(filterSpec, propertyNames));
}
return(new ContextDetailPartitioned(rawSpecs));
}
// hash
else if (ctx.COALESCE() != null)
{
IList <EsperEPL2GrammarParser.CreateContextCoalesceItemContext> coalesces = ctx.createContextCoalesceItem();
IList <ContextDetailHashItem> rawSpecs = new List <ContextDetailHashItem>(coalesces.Count);
foreach (EsperEPL2GrammarParser.CreateContextCoalesceItemContext coalesce in coalesces)
{
ExprChainedSpec func = ASTLibFunctionHelper.GetLibFunctionChainSpec(coalesce.libFunctionNoClass(), astExprNodeMap);
filterSpec = ASTFilterSpecHelper.WalkFilterSpec(coalesce.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
propertyEvalSpec = null;
rawSpecs.Add(new ContextDetailHashItem(func, filterSpec));
}
String granularity = ctx.g.Text;
if (!granularity.ToLower().Equals("granularity"))
{
throw ASTWalkException.From("Expected 'granularity' keyword after list of coalesce items, found '" + granularity + "' instead");
}
var num = ASTConstantHelper.Parse(ctx.number());
String preallocateStr = ctx.p != null ? ctx.p.Text : null;
if (preallocateStr != null && !preallocateStr.ToLower().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 ContextDetailHash(rawSpecs, num.AsInt(), preallocateStr != null));
}
// categorized
if (ctx.createContextGroupItem() != null)
{
IList <EsperEPL2GrammarParser.CreateContextGroupItemContext> grps = ctx.createContextGroupItem();
IList <ContextDetailCategoryItem> items = new List <ContextDetailCategoryItem>();
foreach (EsperEPL2GrammarParser.CreateContextGroupItemContext grp in grps)
{
ExprNode exprNode = ASTExprHelper.ExprCollectSubNodes(grp, 0, astExprNodeMap)[0];
String name = grp.i.Text;
items.Add(new ContextDetailCategoryItem(exprNode, name));
}
filterSpec = ASTFilterSpecHelper.WalkFilterSpec(ctx.eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
return(new ContextDetailCategory(items, filterSpec));
}
throw new IllegalStateException("Unrecognized context detail type");
}
