public static IList<OnTriggerSetAssignment> GetOnTriggerSetAssignments(
EsperEPL2GrammarParser.OnSetAssignmentListContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
if (ctx == null || ctx.onSetAssignment().IsEmpty())
{
return new EmptyList<OnTriggerSetAssignment>();
}
IList<EsperEPL2GrammarParser.OnSetAssignmentContext> ctxs = ctx.onSetAssignment();
IList<OnTriggerSetAssignment> assignments = new List<OnTriggerSetAssignment>(ctx.onSetAssignment().Length);
foreach (EsperEPL2GrammarParser.OnSetAssignmentContext assign in ctxs)
{
ExprNode childEvalNode;
if (assign.chainable() != null)
{
ExprNode prop = ASTExprHelper.ExprCollectSubNodes(assign.chainable(), 0, astExprNodeMap)[0];
ExprNode value = ASTExprHelper.ExprCollectSubNodes(assign.expression(), 0, astExprNodeMap)[0];
ExprEqualsNode equals = new ExprEqualsNodeImpl(false, false);
equals.AddChildNode(prop);
equals.AddChildNode(value);
childEvalNode = equals;
}
else
{
childEvalNode = ASTExprHelper.ExprCollectSubNodes(assign, 0, astExprNodeMap)[0];
}
assignments.Add(new OnTriggerSetAssignment(childEvalNode));
}
return assignments;
}
public static ExprNode MathGetExpr(
IParseTree ctx,
IDictionary<ITree, ExprNode> astExprNodeMap,
Configuration configurationInformation)
{
int count = 1;
ExprNode @base = ASTExprHelper.ExprCollectSubNodes(ctx.GetChild(0), 0, astExprNodeMap)[0];
while (true)
{
int token = ASTUtil.GetAssertTerminatedTokenType(ctx.GetChild(count));
MathArithTypeEnum mathArithTypeEnum = TokenToMathEnum(token);
ExprNode right = ASTExprHelper.ExprCollectSubNodes(ctx.GetChild(count + 1), 0, astExprNodeMap)[0];
ExprMathNode math = new ExprMathNode(
mathArithTypeEnum,
configurationInformation.Compiler.Expression.IsIntegerDivision,
configurationInformation.Compiler.Expression.IsDivisionByZeroReturnsNull);
math.AddChildNode(@base);
math.AddChildNode(right);
@base = math;
count += 2;
if (count >= ctx.ChildCount)
{
break;
}
}
return @base;
}
private static CreateIndexItem Walk(
EsperEPL2GrammarParser.CreateIndexColumnContext col,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
IList<ExprNode> expressions = new EmptyList<ExprNode>();
if (col.i != null)
{
expressions = ASTExprHelper.ExprCollectSubNodes(col.i, 0, astExprNodeMap);
}
else if (col.expression() != null)
{
expressions = ASTExprHelper.ExprCollectSubNodes(col.expression(), 0, astExprNodeMap);
}
string type = CreateIndexType.HASH.GetName().ToLowerInvariant();
if (col.t != null)
{
type = col.t.Text;
}
IList<ExprNode> parameters = new EmptyList<ExprNode>();
if (col.p != null)
{
parameters = ASTExprHelper.ExprCollectSubNodes(col.p, 0, astExprNodeMap);
}
return new CreateIndexItem(expressions, type, parameters);
}
private static ContextSpecCondition GetContextCondition(
EsperEPL2GrammarParser.CreateContextRangePointContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap,
IDictionary<ITree, EvalForgeNode> astPatternNodeMap,
PropertyEvalSpec propertyEvalSpec,
bool immediate)
{
if (ctx == null)
{
return ContextSpecConditionNever.INSTANCE;
}
if (ctx.crontabLimitParameterSetList() != null) {
var crontabs = new List<IList<ExprNode>>();
foreach (var crontabCtx in ctx.crontabLimitParameterSetList().crontabLimitParameterSet()) {
var crontab = ASTExprHelper.ExprCollectSubNodes(crontabCtx, 0, astExprNodeMap);
crontabs.Add(crontab);
}
return new ContextSpecConditionCrontab(crontabs, immediate);
}
if (ctx.patternInclusionExpression() != null)
{
var evalNode = ASTExprHelper.PatternGetRemoveTopNode(ctx.patternInclusionExpression(), astPatternNodeMap);
var inclusive = false;
if (ctx.i != null)
{
var ident = ctx.i.Text;
if (ident != null && !ident.ToLowerInvariant().Equals("inclusive"))
{
throw ASTWalkException.From("Expected 'inclusive' keyword after '@', found '" + ident + "' instead");
}
inclusive = true;
}
return new ContextSpecConditionPattern(evalNode, inclusive, immediate);
}
if (ctx.createContextFilter() != null)
{
if (immediate)
{
throw ASTWalkException.From("Invalid use of 'now' with initiated-by stream, this combination is not supported");
}
return GetContextDetailConditionFilter(ctx.createContextFilter(), propertyEvalSpec, astExprNodeMap);
}
if (ctx.AFTER() != null)
{
var timePeriod = (ExprTimePeriod) ASTExprHelper.ExprCollectSubNodes(ctx.timePeriod(), 0, astExprNodeMap)[0];
return new ContextSpecConditionTimePeriod(timePeriod, immediate);
}
throw new IllegalStateException("Unrecognized child type");
}
private static CreateTableColumn GetColumn(
EsperEPL2GrammarParser.CreateTableColumnContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap,
StatementSpecMapEnv mapEnv)
{
var columnName = ctx.n.Text;
ExprNode optExpression = null;
if (ctx.builtinFunc() != null || ctx.chainable() != null)
{
optExpression = ASTExprHelper.ExprCollectSubNodes(ctx, 0, astExprNodeMap)[0];
}
var optType = ASTClassIdentifierHelper.Walk(ctx.classIdentifierWithDimensions());
var primaryKey = false;
if (ctx.p != null)
{
if (!string.Equals(ctx.p.Text, "primary", StringComparison.InvariantCultureIgnoreCase))
{
throw ASTWalkException.From("Invalid keyword '" + ctx.p.Text + "' encountered, expected 'primary key'");
}
if (!string.Equals(ctx.k.Text, "key", StringComparison.InvariantCultureIgnoreCase))
{
throw ASTWalkException.From("Invalid keyword '" + ctx.k.Text + "' encountered, expected 'primary key'");
}
primaryKey = true;
}
IList<AnnotationDesc> annots = new EmptyList<AnnotationDesc>();
if (ctx.annotationEnum() != null)
{
annots = new List<AnnotationDesc>(ctx.annotationEnum().Length);
foreach (EsperEPL2GrammarParser.AnnotationEnumContext anctx in ctx.annotationEnum())
{
annots.Add(ASTAnnotationHelper.Walk(anctx, mapEnv.ImportService));
}
}
if (ctx.typeExpressionAnnotation() != null)
{
if (annots.IsEmpty())
{
annots = new List<AnnotationDesc>();
}
foreach (EsperEPL2GrammarParser.TypeExpressionAnnotationContext anno in ctx.typeExpressionAnnotation())
{
annots.Add(new AnnotationDesc(anno.n.Text, anno.v.Text));
}
}
return new CreateTableColumn(columnName, optExpression, optType, annots, primaryKey);
}
public static FilterSpecRaw WalkFilterSpec(
EsperEPL2GrammarParser.EventFilterExpressionContext ctx,
PropertyEvalSpec propertyEvalSpec,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
var eventName = ASTUtil.UnescapeClassIdent(ctx.classIdentifier());
var exprNodes = ctx.expressionList() != null
? ASTExprHelper.ExprCollectSubNodes(ctx.expressionList(), 0, astExprNodeMap)
: new List<ExprNode>(1);
return new FilterSpecRaw(eventName, exprNodes, propertyEvalSpec);
}
private static GroupByClauseElement WalkCombinable(
EsperEPL2GrammarParser.GroupByCombinableExprContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
if (ctx.e1 != null && ctx.LPAREN() == null)
{
ExprNode expr = ASTExprHelper.ExprCollectSubNodes(ctx.e1, 0, astExprNodeMap)[0];
return new GroupByClauseElementExpr(expr);
}
var combined = ASTExprHelper.ExprCollectSubNodes(ctx, 0, astExprNodeMap);
return new GroupByClauseElementCombinedExpr(combined);
}
public static void AddOptionalSimpleProperty(
ExprNode exprNode,
IToken token,
VariableCompileTimeResolver variableCompileTimeResolver,
StatementSpecRaw spec)
{
if (token == null)
{
return;
}
ExprNode node = ASTExprHelper.ResolvePropertyOrVariableIdentifier(token.Text, variableCompileTimeResolver, spec);
exprNode.AddChildNode(node);
}
private static GroupByClauseElement WalkChoice(
EsperEPL2GrammarParser.GroupByListChoiceContext choice,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
if (choice.e1 != null)
{
var expr = ASTExprHelper.ExprCollectSubNodes(choice.e1, 0, astExprNodeMap)[0];
return new GroupByClauseElementExpr(expr);
}
if (choice.groupByCubeOrRollup() != null)
{
return WalkCubeOrRollup(choice.groupByCubeOrRollup(), astExprNodeMap);
}
return WalkGroupingSets(choice.groupByGroupingSets().groupBySetsChoice(), astExprNodeMap);
}
public static IList <ExprNode> GetExprNodesLibFunc(
EsperEPL2GrammarParser.LibFunctionArgsContext ctx,
IDictionary <ITree, ExprNode> astExprNodeMap)
{
if (ctx == null)
{
return(EmptyList <ExprNode> .Instance);
}
IList <EsperEPL2GrammarParser.LibFunctionArgItemContext> args = ctx.libFunctionArgItem();
if (args == null || args.IsEmpty())
{
return(EmptyList <ExprNode> .Instance);
}
IList <ExprNode> parameters = new List <ExprNode>(args.Count);
foreach (EsperEPL2GrammarParser.LibFunctionArgItemContext arg in args)
{
if (arg.expressionLambdaDecl() != null)
{
IList <string> lambdaparams = GetLambdaGoesParams(arg.expressionLambdaDecl());
ExprLambdaGoesNode goes = new ExprLambdaGoesNode(lambdaparams);
ExprNode lambdaExpr = ASTExprHelper.ExprCollectSubNodes(arg.expressionWithNamed(), 0, astExprNodeMap)[0];
goes.AddChildNode(lambdaExpr);
parameters.Add(goes);
}
else
{
IList <ExprNode> @params = ASTExprHelper.ExprCollectSubNodes(arg.expressionWithNamed(), 0, astExprNodeMap);
ExprNode parameter = @params[0];
parameters.Add(parameter);
}
}
return(parameters);
}
public static void AddChainablesInternal(
EsperEPL2GrammarParser.ChainableElementsContext ctx,
IDictionary <ITree, ExprNode> astExprNodeMap,
IList <Chainable> chain)
{
foreach (var context in ctx.chainableAtomicWithOpt())
{
var optionalChainable = context.q != null;
var atomic = context.chainableAtomic();
Chainable chainable;
if (atomic.chainableArray() != null)
{
var @params = ASTExprHelper.ExprCollectSubNodes(atomic.chainableArray(), 0, astExprNodeMap);
chainable = new ChainableArray(false, optionalChainable, @params);
}
else
{
chainable = GetChainable(context.chainableAtomic().chainableWithArgs(), optionalChainable, astExprNodeMap);
}
chain.Add(chainable);
}
}
public static RowRecogExprRepeatDesc WalkOptionalRepeat(
EsperEPL2GrammarParser.MatchRecogPatternRepeatContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap)
{
if (ctx == null)
{
return null;
}
var e1 = ctx.e1 == null ? null : ASTExprHelper.ExprCollectSubNodes(ctx.e1, 0, astExprNodeMap)[0];
var e2 = ctx.e2 == null ? null : ASTExprHelper.ExprCollectSubNodes(ctx.e2, 0, astExprNodeMap)[0];
if (ctx.comma == null && ctx.e1 != null)
{
return new RowRecogExprRepeatDesc(null, null, e1);
}
if (e1 == null && e2 == null)
{
throw ASTWalkException.From("Invalid match-recognize quantifier '" + ctx.GetText() + "', expecting an expression");
}
return new RowRecogExprRepeatDesc(e1, e2, null);
}
public static ExprTimePeriod TimePeriodGetExprAllParams(
EsperEPL2GrammarParser.TimePeriodContext ctx,
IDictionary<ITree, ExprNode> astExprNodeMap,
VariableCompileTimeResolver variableCompileTimeResolver,
StatementSpecRaw spec,
Configuration config,
TimeAbacus timeAbacus)
{
ExprNode[] nodes = new ExprNode[9];
for (int i = 0; i < ctx.ChildCount; i++)
{
IParseTree unitRoot = ctx.GetChild(i);
ExprNode valueExpr;
if (ASTUtil.IsTerminatedOfType(unitRoot.GetChild(0), EsperEPL2GrammarLexer.IDENT))
{
string ident = unitRoot.GetChild(0).GetText();
valueExpr = ASTExprHelper.ResolvePropertyOrVariableIdentifier(ident, variableCompileTimeResolver, spec);
}
else
{
AtomicReference<ExprNode> @ref = new AtomicReference<ExprNode>();
ExprAction action = (exprNode, astExprNodeMapX, node) => {
astExprNodeMapX.Remove(node);
@ref.Set(exprNode);
};
ASTExprHelper.RecursiveFindRemoveChildExprNode(unitRoot.GetChild(0), astExprNodeMap, action);
valueExpr = @ref.Get();
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_microsecondPart)
{
nodes[8] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_millisecondPart)
{
nodes[7] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_secondPart)
{
nodes[6] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_minutePart)
{
nodes[5] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_hourPart)
{
nodes[4] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_dayPart)
{
nodes[3] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_weekPart)
{
nodes[2] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_monthPart)
{
nodes[1] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_yearPart)
{
nodes[0] = valueExpr;
}
}
ExprTimePeriod timeNode = new ExprTimePeriodImpl(
nodes[0] != null, nodes[1] != null,
nodes[2] != null, nodes[3] != null,
nodes[4] != null, nodes[5] != null,
nodes[6] != null, nodes[7] != null,
nodes[8] != null, timeAbacus);
foreach (ExprNode node in nodes)
{
if (node != null)
{
timeNode.AddChildNode(node);
}
}
return timeNode;
}
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 MyPair WalkExpressionDecl(
EsperEPL2GrammarParser.ExpressionDeclContext ctx,
IList<string> scriptBodies,
IDictionary<ITree, ExprNode> astExprNodeMap,
CommonTokenStream tokenStream)
{
var name = ctx.name.Text;
if (ctx.alias != null)
{
if (!ctx.alias.Text.ToLowerInvariant().Trim().Equals("alias"))
{
throw ASTWalkException.From(
"For expression alias '" + name + "' expecting 'alias' keyword but received '" + ctx.alias.Text + "'");
}
if (ctx.columnList() != null)
{
throw ASTWalkException.From(
"For expression alias '" + name + "' expecting no parameters but received '" + tokenStream.GetText(ctx.columnList()) + "'");
}
if (ctx.expressionDef() != null && ctx.expressionDef().expressionLambdaDecl() != null)
{
throw ASTWalkException.From(
"For expression alias '" + name + "' expecting an expression without parameters but received '" +
tokenStream.GetText(ctx.expressionDef().expressionLambdaDecl()) + "'");
}
if (ctx.expressionDef().stringconstant() != null)
{
throw ASTWalkException.From("For expression alias '" + name + "' expecting an expression but received a script");
}
var node = ASTExprHelper.ExprCollectSubNodes(ctx, 0, astExprNodeMap)[0];
var alias = ctx.name.Text;
var expressionUnmap = StatementSpecMapper.Unmap(node);
var decl = new ExpressionDeclItem(alias, new string[0], true);
decl.OptionalSoda = expressionUnmap;
return new MyPair(decl, null);
}
if (ctx.expressionDef().stringconstant() != null)
{
var expressionText = scriptBodies.DeleteAt(0);
var parameters = ASTUtil.GetIdentList(ctx.columnList());
var optionalReturnType = ctx.classIdentifier() == null ? null : ASTUtil.UnescapeClassIdent(ctx.classIdentifier());
var optionalReturnTypeArray = ctx.array != null;
var optionalDialect = ctx.expressionDialect() == null ? null : ctx.expressionDialect().d.Text;
var optionalEventTypeName = ASTTypeExpressionAnnoHelper.ExpectMayTypeAnno(ctx.typeExpressionAnnotation(), tokenStream);
var script = new ExpressionScriptProvided(
name, expressionText, parameters.ToArray(),
optionalReturnType, optionalReturnTypeArray, optionalEventTypeName, optionalDialect);
return new MyPair(null, script);
}
var ctxexpr = ctx.expressionDef();
var inner = ASTExprHelper.ExprCollectSubNodes(ctxexpr.expression(), 0, astExprNodeMap)[0];
IList<string> parametersNames = new EmptyList<string>();
var lambdactx = ctxexpr.expressionLambdaDecl();
if (ctxexpr.expressionLambdaDecl() != null)
{
parametersNames = ASTLambdaHelper.GetLambdaGoesParams(lambdactx);
}
var expression = StatementSpecMapper.Unmap(inner);
var expr = new ExpressionDeclItem(name, parametersNames.ToArray(), false);
expr.OptionalSoda = expression;
return new MyPair(expr, null);
}
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);
}