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Date: Fri, 18 May 2007 10:35:16 -0700 (PDT)
From: "Michael Busch (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-881) QueryParser escaping/parsin issue with
 strings starting/ending with ||
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     [ https://issues.apache.org/jira/browse/LUCENE-881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Busch updated LUCENE-881:
---------------------------------

    Attachment: lucene-881.patch

Patch with additional unit tests.

All tests pass.

> QueryParser escaping/parsin issue with strings starting/ending with ||
> ----------------------------------------------------------------------
>
>                 Key: LUCENE-881
>                 URL: https://issues.apache.org/jira/browse/LUCENE-881
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: QueryParser
>    Affects Versions: 2.1, 2.2
>         Environment: MAC OS X 10.4.7, J2SE 5.0 Release 4
>            Reporter: Slobodan Marjanovic
>         Assigned To: Michael Busch
>            Priority: Trivial
>         Attachments: lucene-881.patch
>
>
> There is a problem with query parser when search string starts/ends with ||.  When string contains || in the middle like 'something || something' everything runs without a problem.
> Part of code: 
>   searchText = QueryParser.escape(searchText);
>   QueryParser parser = null;
>   parser = new QueryParser(fieldName, new CustomAnalyser());
>   parser.parse(searchText);
> CustomAnalyser class extends Analyser. Here is the only redefined method: 
>     @Override
>     public TokenStream tokenStream(String fieldName, Reader reader) {
>       return new PorterStemFilter( (new StopAnalyzer()).tokenStream(fieldName, reader));
>     }
> I have tested this on Lucene 2.1 and latest source I have checked-out from SVN (Revision 538867) and in both cases parsing exception was thrown.
> Part of Stack Trace (Lucene - SVN checkout - Revision 538867):
> Cannot parse 'someting ||': Encountered "<EOF>" at line 1, column 11.
> Was expecting one of:
>     <NOT> ...
>     "+" ...
>     "-" ...
>     "(" ...
>     "*" ...
>     <QUOTED> ...
>     <TERM> ...
>     <PREFIXTERM> ...
>     <WILDTERM> ...
>     "[" ...
>     "{" ...
>     <NUMBER> ...
>     
>  org.apache.lucene.queryParser.ParseException: Cannot parse 'someting ||': Encountered "<EOF>" at line 1, column 11.
> Was expecting one of:
>     <NOT> ...
>     "+" ...
>     "-" ...
>     "(" ...
>     "*" ...
>     <QUOTED> ...
>     <TERM> ...
>     <PREFIXTERM> ...
>     <WILDTERM> ...
>     "[" ...
>     "{" ...
>     <NUMBER> ...
>     
>         at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:150)
> Part of Stack Trace (Lucene 2.1):
> Cannot parse 'something ||': Encountered "<EOF>" at line 1, column 12.
> Was expecting one of:
>     <NOT> ...
>     "+" ...
>     "-" ...
>     "(" ...
>     "*" ...
>     <QUOTED> ...
>     <TERM> ...
>     <PREFIXTERM> ...
>     <WILDTERM> ...
>     "[" ...
>     "{" ...
>     <NUMBER> ...
>     
>  org.apache.lucene.queryParser.ParseException: Cannot parse 'something ||': Encountered "<EOF>" at line 1, column 12.
> Was expecting one of:
>     <NOT> ...
>     "+" ...
>     "-" ...
>     "(" ...
>     "*" ...
>     <QUOTED> ...
>     <TERM> ...
>     <PREFIXTERM> ...
>     <WILDTERM> ...
>     "[" ...
>     "{" ...
>     <NUMBER> ...
>     
>         at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:149)

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