com.espertech.esper.rowregex

Class EventRowRegexHelper

java.lang.Object

com.espertech.esper.rowregex.EventRowRegexHelper

public class EventRowRegexHelper
extends Object

Helper for match recognize.

Field Summary

Fields

Modifier and Type	Field and Description
protected static Comparator<RegexNFAStateEntry>	END_STATE_COMPARATOR

Constructor Summary

Constructors

Constructor and Description
EventRowRegexHelper()

Method Summary

Modifier and Type	Method and Description
static Map<String,Set<String>>	determineVisibility(RowRegexExprNode pattern)
protected static RegexNFAStrandResult	recursiveBuildStartStates(RowRegexExprNode parent, Map<String,Pair<ExprNode,ExprEvaluator>> variableDefinitions, Map<String,Pair<Integer,Boolean>> variableStreams, boolean[] exprRequiresMultimatchState) Build a list of start states from the parent node.
static EventRowRegexNFAViewService	recursiveFindRegexService(Viewable top)
protected static void	recursiveInspectVariables(RowRegexExprNode parent, boolean isMultiple, Set<String> variablesSingle, Set<String> variablesMultiple) Inspect variables recursively.

Methods inherited from class java.lang.Object

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

Field Detail

END_STATE_COMPARATOR

protected static final Comparator<RegexNFAStateEntry> END_STATE_COMPARATOR

Constructor Detail

EventRowRegexHelper

public EventRowRegexHelper()

Method Detail

recursiveFindRegexService

public static EventRowRegexNFAViewService recursiveFindRegexService(Viewable top)

recursiveInspectVariables

protected static void recursiveInspectVariables(RowRegexExprNode parent,
                                                boolean isMultiple,
                                                Set<String> variablesSingle,
                                                Set<String> variablesMultiple)

Inspect variables recursively.

Parameters:

parent - parent regex expression node

isMultiple - if the variable in the stack is multiple of single

variablesSingle - single variables list

variablesMultiple - group variables list

recursiveBuildStartStates

protected static RegexNFAStrandResult recursiveBuildStartStates(RowRegexExprNode parent,
                                                                Map<String,Pair<ExprNode,ExprEvaluator>> variableDefinitions,
                                                                Map<String,Pair<Integer,Boolean>> variableStreams,
                                                                boolean[] exprRequiresMultimatchState)

Build a list of start states from the parent node.

Parameters:

parent - to build start state for

variableDefinitions - each variable and its expressions

variableStreams - variable name and its stream number

exprRequiresMultimatchState - indicator whether multi-match state required

Returns:

strand of regex state nodes

determineVisibility

public static Map<String,Set<String>> determineVisibility(RowRegexExprNode pattern)