Examples of org.apache.lucene.index.Term

org.apache.lucene.index.Term
A Term represents a word from text. This is the unit of search. It is composed of two elements, the text of the word, as a string, and the name of the field that the text occurred in. Note that terms may represent more than words from text fields, but also things like dates, email addresses, urls, etc.

                    new StandardAnalyzer().tokenStream(null, new StringReader(escape(terms).toLowerCase()));


            while (true) {
                Token t = includeStream.next();
                if (t == null) break;
                query.add( new Term(fieldName, t.termText()) );
            }


            return query.getTerms().length > 0 ? query : null;
        } catch (Exception ex) {
            throw new RuntimeException(ex);

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    private Query buildTermQuery(String fieldName, String terms) {
        String[] termsArray = escape(terms).toLowerCase().split("\\s"); // Just split user input by whitespace
        if (termsArray.length > 1) {
            BooleanQuery query = new BooleanQuery();
            for (String s: termsArray) {
                TermQuery termQuery = new TermQuery(new Term(fieldName, s) );
                query.add(termQuery, BooleanClause.Occur.SHOULD);
            }
            return query.getClauses().length > 0 ? query : null;
        } else {
            return termsArray.length != 0 ? new TermQuery(new Term(fieldName, termsArray[0])) : null;
        }
    }

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    MailRecord[] aRetArr;


  BooleanQuery oFld = new BooleanQuery();
  for (int f=0; f<aFolderName.length; f++)
    oFld.add(new TermQuery(new Term("container",aFolderName[f])),BooleanClause.Occur.SHOULD);


  BooleanQuery oQry = new BooleanQuery();


  oQry.add(new TermQuery(new Term("workarea",sWorkArea)),BooleanClause.Occur.MUST);
    oQry.add(oFld, BooleanClause.Occur.MUST);


    if (null!=sSender)
      oQry.add(new TermQuery(new Term("author",Gadgets.ASCIIEncode(sSender))),BooleanClause.Occur.MUST);
     
    if (null!=sRecipient)
      oQry.add(new TermQuery(new Term("recipients",sRecipient)),BooleanClause.Occur.MUST);
      
    if (null!=sSubject)
      oQry.add(new TermQuery(new Term("title",Gadgets.ASCIIEncode(sSubject))),BooleanClause.Occur.MUST);
   
    if (dtFromDate!=null && dtToDate!=null)
    oQry.add(new RangeQuery(new Term("created",DateTools.dateToString(dtFromDate, DateTools.Resolution.DAY)),
                  new Term("created",DateTools.dateToString(dtToDate, DateTools.Resolution.DAY)), true), BooleanClause.Occur.MUST);    
    else if (dtFromDate!=null)
    oQry.add(new RangeQuery(new Term("created",DateTools.dateToString(dtFromDate, DateTools.Resolution.DAY)),
                  new Term("created",DateTools.dateToString(new Date(299,11,31), DateTools.Resolution.DAY)), true), BooleanClause.Occur.MUST);    
    else if (dtToDate!=null)
    oQry.add(new RangeQuery(new Term("created",DateTools.dateToString(new Date(79,11,31), DateTools.Resolution.DAY)),
                  new Term("created",DateTools.dateToString(dtToDate, DateTools.Resolution.DAY)), true), BooleanClause.Occur.MUST);


    if (null!=sText)
      oQry.add(new TermQuery(new Term("text",sText)),BooleanClause.Occur.SHOULD);


  String sSegments = Gadgets.chomp(sLuceneIndexPath,File.separator)+"k_mime_msgs"+File.separator+sWorkArea;  
    if (DebugFile.trace) DebugFile.writeln("new IndexSearcher("+sSegments+")");
    IndexSearcher oSearch = new IndexSearcher(sSegments);

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        log.info("befor delete: indexReader.numDocs()=" + indexReader.numDocs());
        // 2. Delete old Document
        // loop over all documents in updateQueue
        for (int i = 0; i < updateCopy.size(); i++) {
          String resourceUrl = updateCopy.get(i).get(OlatDocument.RESOURCEURL_FIELD_NAME);
          Term term = new Term(OlatDocument.RESOURCEURL_FIELD_NAME, resourceUrl );
          log.info("updateQueue:delete documents with resourceUrl=" + resourceUrl );
          indexReader.deleteDocuments(term);          
        }
        // loop over all documents in deleteQueue
        for (int i = 0; i < deleteCopy.size(); i++) {
          String resourceUrl = deleteCopy.get(i).get(OlatDocument.RESOURCEURL_FIELD_NAME);
          Term term = new Term(OlatDocument.RESOURCEURL_FIELD_NAME, resourceUrl );
          log.info("deleteQueue:delete documents with resourceUrl='" + resourceUrl + "'");
          indexReader.deleteDocuments(term);
          
        }
        log.info("after delete: indexReader.numDocs()=" + indexReader.numDocs());

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    if(field == null){
      throw new IllegalArgumentException("parameter \"field\" is null");
    }


    if(query == null || "".equals(query.trim())){
      return new TermQuery(new Term(field));
    }
    
    //从缓存中取出已经解析的query生产的TokenBranch
    TokenBranch root = getCachedTokenBranch(query);
    if(root != null){

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     */
    List<Query> toQueries(String fieldName){      
      List<Query> queries = new ArrayList<Query>(1);      
       //生成当前branch 的query
      if(lexeme != null){
        queries.add(new TermQuery(new Term(fieldName , lexeme.getLexemeText())));
      }      
      //生成child branch 的query
      if(acceptedBranchs != null && acceptedBranchs.size() > 0){
        if(acceptedBranchs.size() == 1){
          Query onlyOneQuery = optimizeQueries(acceptedBranchs.get(0).toQueries(fieldName));

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          Element e3 = this.elements.get(i + 2);
          //处理 = 和 ： 运算
          if('\'' == e3.type){
            i+=2;
            if('=' == e2.type){
              TermQuery tQuery = new TermQuery(new Term(e.toString() , e3.toString()));
              this.querys.push(tQuery);
            }else if(':' == e2.type){
              String keyword = e3.toString();
              if(keyword.startsWith("^") && keyword.endsWith("$")){
                Query pQuery = this.luceneQueryParse(e.toString(), keyword);

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    {
        if (!create)
        {                 // incrementally update


            reader = IndexReader.open(index);         // open existing index
            uidIter = reader.terms(new Term("uid", "")); // init uid iterator


            indexDocs(file);


            if (deleting)
            {                 // delete rest of stale docs

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     * @param value the value of the field that search results must match.
     */
    public FieldFilter(String field, String value) {
        this.field = field;
        this.value = value;
        searchTerm = new Term(field, value);
    }

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            // logger.info("adding doc to"+indexName);


            if (logger.isDebugEnabled())
                logger.debug("Adding " + shardedId + " to " + indexName);


            Term idTerm = this.idTerm.createTerm(cmd.indexedId);


            if (isUpdate)
            {
                writer.updateDocument(indexName, idTerm, cmd.getLuceneDocument(schema), schema.getAnalyzer(),
                        shardedId, false);

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