io.siddhi.core.util.parser

Class ExpressionParser

java.lang.Object

io.siddhi.core.util.parser.ExpressionParser

public class ExpressionParser
extends Object

Class to parse Expressions and create Expression executors.

Constructor Summary

Constructors

Constructor and Description
ExpressionParser()

Method Summary

Modifier and Type

Method and Description

static ExpressionExecutor

parseExpression(io.siddhi.query.api.expression.Expression expression, MetaComplexEvent metaEvent, int currentState, Map<String,Table> tableMap, List<VariableExpressionExecutor> executorList, boolean groupBy, int defaultStreamEventIndex, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, SiddhiQueryContext siddhiQueryContext) Parse the given expression and create the appropriate Executor by recursively traversing the expression

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExpressionParser

public ExpressionParser()

Method Detail

parseExpression

public static ExpressionExecutor parseExpression(io.siddhi.query.api.expression.Expression expression,
                                                 MetaComplexEvent metaEvent,
                                                 int currentState,
                                                 Map<String,Table> tableMap,
                                                 List<VariableExpressionExecutor> executorList,
                                                 boolean groupBy,
                                                 int defaultStreamEventIndex,
                                                 ProcessingMode processingMode,
                                                 boolean outputExpectsExpiredEvents,
                                                 SiddhiQueryContext siddhiQueryContext)

Parse the given expression and create the appropriate Executor by recursively traversing the expression

Parameters:

expression - Expression to be parsed

metaEvent - Meta Event

currentState - Current state number

tableMap - Event Table Map

executorList - List to hold VariableExpressionExecutors to update after query parsing

groupBy - is for groupBy expression

defaultStreamEventIndex - Default StreamEvent Index

processingMode - processing mode of the query

outputExpectsExpiredEvents - is expired events sent as output

siddhiQueryContext - current siddhi query context

Returns:

ExpressionExecutor