com.espertech.esper.rowregex

Class RegexNFAStateOneOptional

java.lang.Object

com.espertech.esper.rowregex.RegexNFAStateBase

com.espertech.esper.rowregex.RegexNFAStateOneOptional

All Implemented Interfaces:

RegexNFAState

public class RegexNFAStateOneOptional
extends RegexNFAStateBase
implements RegexNFAState

The '?' state in the regex NFA states.

Constructor Summary

Constructors

Constructor and Description
RegexNFAStateOneOptional(String nodeNum, String variableName, int streamNum, boolean multiple, boolean isGreedy, ExprEvaluator exprEvaluator, boolean exprRequiresMultimatchState) Ctor.

Method Summary

Modifier and Type	Method and Description
boolean	isExprRequiresMultimatchState() Whether or not the match-expression requires multimatch state
boolean	matches(EventBean[] eventsPerStream, ExprEvaluatorContext exprEvaluatorContext) Evaluate a match.
String	toString()

Methods inherited from class com.espertech.esper.rowregex.RegexNFAStateBase

addState, getNextStates, getNodeNumFlat, getNodeNumNested, getStreamNum, getVariableName, isGreedy, isMultiple, setNodeNumFlat

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.rowregex.RegexNFAState

getNextStates, getNodeNumFlat, getNodeNumNested, getStreamNum, getVariableName, isGreedy, isMultiple

Constructor Detail

RegexNFAStateOneOptional

public RegexNFAStateOneOptional(String nodeNum,
                                String variableName,
                                int streamNum,
                                boolean multiple,
                                boolean isGreedy,
                                ExprEvaluator exprEvaluator,
                                boolean exprRequiresMultimatchState)

Ctor.

Parameters:

nodeNum - node num

variableName - variable name

streamNum - stream number

multiple - true for multiple matches

isGreedy - true for greedy

exprEvaluator - filter expression

exprRequiresMultimatchState - indicator for multi-match state required

Method Detail

matches

public boolean matches(EventBean[] eventsPerStream,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: RegexNFAState

Evaluate a match.

Specified by:

matches in interface RegexNFAState

Parameters:

eventsPerStream - variabele values

exprEvaluatorContext - expression evaluation context

Returns:

match indicator

toString

public String toString()

Overrides:

toString in class Object

isExprRequiresMultimatchState

public boolean isExprRequiresMultimatchState()

Description copied from interface: RegexNFAState

Whether or not the match-expression requires multimatch state

Specified by:

isExprRequiresMultimatchState in interface RegexNFAState

Returns:

indicator