Re: query syntax question

[markharw00d]

Here's a way to do it using the XML query parser in contrib....
1) Create this query.xsl file (note use of cached double negative filter)
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:template match="/Document">
<FilteredQuery>
   <Query>
       <UserQuery><xsl:value-of select="query"/></UserQuery>
   </Query>
   <Filter>
       <CachedFilter>
           <BooleanFilter>
               <Clause occurs="mustNot">
                   <RangeFilter fieldName="surname" lowerTerm="a" 
upperTerm="z"/>
               </Clause>
               <Clause occurs="mustNot">
                   <RangeFilter fieldName="forename" lowerTerm="a" 
upperTerm="z"/>
               </Clause>
           </BooleanFilter>
       </CachedFilter>
   </Filter>
</FilteredQuery>
</xsl:template>
</xsl:stylesheet> 

2) Query as follows:
       //Setup test data
       Analyzer analyzer=new WhitespaceAnalyzer();       
       RAMDirectory rd=new RAMDirectory();
       IndexWriter w=new IndexWriter(rd,new WhitespaceAnalyzer(),true);
       Document d=new Document();
       d.add(new Field("contents","foo 1- must not 
match",Field.Store.YES,Field.Index.TOKENIZED));
       d.add(new 
Field("surname","smith",Field.Store.YES,Field.Index.TOKENIZED));
       w.addDocument(d);
      
       d=new Document();
       d.add(new Field("contents","foo 2- must not 
match",Field.Store.YES,Field.Index.TOKENIZED));
       d.add(new 
Field("forename","fred",Field.Store.YES,Field.Index.TOKENIZED));
       w.addDocument(d);
      
       d=new Document();
       d.add(new Field("contents","foo 3- must not 
match",Field.Store.YES,Field.Index.TOKENIZED));
       d.add(new 
Field("forename","fred",Field.Store.YES,Field.Index.TOKENIZED));
       d.add(new 
Field("surname","smith",Field.Store.YES,Field.Index.TOKENIZED));
       w.addDocument(d);
      
       d=new Document();
       d.add(new Field("contents","foo 4- must 
match",Field.Store.YES,Field.Index.TOKENIZED));
       w.addDocument(d);
       w.close();
      
       IndexSearcher searcher=new IndexSearcher(rd);
      
       //one-off setup - store these
       QueryTemplateManager qtm=new QueryTemplateManager(
               TestXml.class.getResourceAsStream("query.xsl"));
       CorePlusExtensionsParser cp = new CorePlusExtensionsParser(analyzer,
               new QueryParser("contents",analyzer));
      
        //get the user form input
       String queryString="foo";
       Properties userInput=new Properties();
       userInput.setProperty("query",queryString);

//        Transform the user input into a Lucene XML query, then pass to 
parser
       Query 
q=cp.getQuery(qtm.getQueryAsDOM(userInput).getDocumentElement());
      
       Hits h = searcher.search(q);
       for (int i = 0; i < h.length(); i++)
       {
           d=h.doc(i);
           System.out.println(d.get("contents"));
       }

Cheers
Mark




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