DO NOT REPLY [Bug 5791] New: - RegExp Matcher always matches "" as positive!

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=5791

RegExp Matcher always matches "" as positive!

           Summary: RegExp Matcher always matches "" as positive!
           Product: Cocoon 2
           Version: 2.1alpha CVS
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Blocker
          Priority: Other
         Component: core
        AssignedTo: cocoon-dev@xml.apache.org
        ReportedBy: bloritsch@apache.org


Unlike the WildcardMatcher, when you have a sitemap pipeline like this:

<map:match uri="">
  <map:redirect-to href="index.html"/>
</map:match>

the RegExpURIMatcher always matches this in the positive.  If you use this
construct in your Sitemap, you will never get your expected result and the
first request will throw Cocoon into a virtually infinite loop.

The _only_ way out of the infinite loop is the StackOverflowException thrown
by the JVM.  I believe the exception is only thrown in the command line
invocation due to the fact that it keeps wrapping Requests ad infinitum.

The expected result of matching "" should be when you match the root URI only.

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