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From "Slobodan Marjanovic (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-881) QueryParser escaping/parsin issue with strings starting/ending with ||
Date Thu, 17 May 2007 11:21:16 GMT
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


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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