org.wso2.siddhi.core.util.parser

Class ExpressionParser

java.lang.Object

org.wso2.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(org.wso2.siddhi.query.api.expression.Expression expression, MetaComplexEvent metaEvent, int currentState, Map<String,EventTable> eventTableMap, List<VariableExpressionExecutor> executorList, ExecutionPlanContext executionPlanContext, boolean groupBy, int defaultStreamEventIndex, String queryName) 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(org.wso2.siddhi.query.api.expression.Expression expression,
                                                 MetaComplexEvent metaEvent,
                                                 int currentState,
                                                 Map<String,EventTable> eventTableMap,
                                                 List<VariableExpressionExecutor> executorList,
                                                 ExecutionPlanContext executionPlanContext,
                                                 boolean groupBy,
                                                 int defaultStreamEventIndex,
                                                 String queryName)

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

eventTableMap - Event Table Map

executorList - List to hold VariableExpressionExecutors to update after query parsing @return

executionPlanContext - ExecutionPlanContext

groupBy - is for groupBy expression

defaultStreamEventIndex - Default StreamEvent Index

Returns:

ExpressionExecutor