예제 #1
0
        private static ContextDetailCondition GetContextCondition(
            EsperEPL2GrammarParser.CreateContextRangePointContext ctx,
            IDictionary <ITree, ExprNode> astExprNodeMap,
            IDictionary <ITree, EvalFactoryNode> astPatternNodeMap,
            PropertyEvalSpec propertyEvalSpec,
            bool immediate)
        {
            if (ctx == null)
            {
                return(ContextDetailConditionNever.INSTANCE);
            }
            if (ctx.crontabLimitParameterSet() != null)
            {
                var crontab = ASTExprHelper.ExprCollectSubNodes(
                    ctx.crontabLimitParameterSet(), 0, astExprNodeMap);
                return(new ContextDetailConditionCrontab(crontab, immediate));
            }
            else 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 ContextDetailConditionPattern(evalNode, inclusive, immediate));
            }
            else if (ctx.createContextFilter() != null)
            {
                var filterSpecRaw =
                    ASTFilterSpecHelper.WalkFilterSpec(
                        ctx.createContextFilter().eventFilterExpression(), propertyEvalSpec, astExprNodeMap);
                var asName = ctx.createContextFilter().i != null?ctx.createContextFilter().i.Text : null;

                if (immediate)
                {
                    throw ASTWalkException.From(
                              "Invalid use of 'now' with initiated-by stream, this combination is not supported");
                }
                return(new ContextDetailConditionFilter(filterSpecRaw, asName));
            }
            else if (ctx.AFTER() != null)
            {
                var timePeriod =
                    (ExprTimePeriod)ASTExprHelper.ExprCollectSubNodes(ctx.timePeriod(), 0, astExprNodeMap)[0];
                return(new ContextDetailConditionTimePeriod(timePeriod, immediate));
            }
            else
            {
                throw new IllegalStateException("Unrecognized child type");
            }
        }
예제 #2
0
        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");
        }