com.espertech.esper.common.internal.epl.rowrecog.core

Class RowRecogHelper

java.lang.Object

com.espertech.esper.common.internal.epl.rowrecog.core.RowRecogHelper

public class RowRecogHelper
extends Object

Helper for match recognize.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
RowRecogHelper()

Method Summary

Modifier and Type	Method and Description
protected static RowRecogNFAStrandResult	buildStartStates(RowRecogExprNode parent, Map<String,ExprNode> variableDefinitions, Map<String,Pair<Integer,Boolean>> variableStreams, boolean[] exprRequiresMultimatchState) Build a list of start states from the parent node.
static Map<String,Set<String>>	determineVisibility(RowRecogExprNode pattern)
static RowRecogNFAViewService	recursiveFindRegexService(Viewable top)
static void	recursiveInspectVariables(RowRecogExprNode 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<RowRecogNFAStateEntry> END_STATE_COMPARATOR

Constructor Detail

RowRecogHelper

public RowRecogHelper()

Method Detail

recursiveFindRegexService

public static RowRecogNFAViewService recursiveFindRegexService(Viewable top)

recursiveInspectVariables

public static void recursiveInspectVariables(RowRecogExprNode 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

buildStartStates

protected static RowRecogNFAStrandResult buildStartStates(RowRecogExprNode parent,
                                                          Map<String,ExprNode> 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(RowRecogExprNode pattern)