com.espertech.esper.epl.parse
Class ASTMatchUntilHelper

java.lang.Object
  com.espertech.esper.epl.parse.ASTMatchUntilHelper

public class ASTMatchUntilHelper
extends java.lang.Object

Helper for walking a pattern match-until clause.

Constructor Summary

ASTMatchUntilHelper()

Method Summary

static boolean

validate(ExprNode lowerBounds, ExprNode upperBounds, boolean isAllowLowerZero) Validate.

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTMatchUntilHelper

public ASTMatchUntilHelper()

Method Detail

validate

public static boolean validate(ExprNode lowerBounds,
                               ExprNode upperBounds,
                               boolean isAllowLowerZero)
                        throws ASTWalkException

Validate.

Parameters:

lowerBounds - is the lower bounds, or null if none supplied

upperBounds - is the upper bounds, or null if none supplied

isAllowLowerZero - true to allow zero value for lower range

Returns:

true if closed range of constants and the constants are the same value

Throws:

ASTWalkException - if the AST is incorrect