RE: java.lang.ArrayIndexOutOfBoundsException evaluating regexp

[Sanno Point - R.Caprio]

Max length 4096 starting at 0, gives a maximum index of 4095

rc

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-----Original Message-----
From: Böhringer Jochen [mailto:[EMAIL PROTECTED] 
Sent: Friday, February 25, 2005 5:31 AM
To: regexp-user@jakarta.apache.org
Subject: java.lang.ArrayIndexOutOfBoundsException evaluating regexp

Hi,

we use the regexp package version 1.3 in our webapplication to validate user 
inputs. One user input field has a max length of 4096 characters.
So the following regexp is used: .{0,4096}
and leads to this exception: 

java.lang.ArrayIndexOutOfBoundsException: -16381
        at org.apache.regexp.RE.matchNodes(Unknown Source)
        at org.apache.regexp.RE.matchAt(Unknown Source)
        at org.apache.regexp.RE.match(Unknown Source)
        at org.apache.regexp.RE.match(Unknown Source)
        at org.apache.regexp.RE.match(Unknown Source)
        at de.tcc_products.test.RegExpTester.main(RegExpTester.java:10)

If I split up the regexp in a semantically similar regexp: (.{0,128}){0,32}

everything works fine.

Is this a bug or is something wrong with the regexp?

This code snippet can be used to reproduce the error:

package de.tcc_products.test;

import org.apache.regexp.RE;

public class RegExpTester
{
        public static void main(String[] args)
        {
        RE regExp = new RE(".{0,4096}");
        System.out.println("Matches: " + regExp.match("ABC"));
        }
}



Thx
Jochen

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