Examples of org.apache.lucene.document.Field

org.apache.lucene.document.Field
A field is a section of a Document. Each field has two parts, a name and a value. Values may be free text, provided as a String or as a Reader, or they may be atomic keywords, which are not further processed. Such keywords may be used to represent dates, urls, etc. Fields are optionally stored in the index, so that they may be returned with hits on the document.

    /**
     * ��������
     */
    protected static int addIndex() throws IOException {
    Document doc = new Document();
    doc.add(new Field("id", "1", Field.Store.YES, Field.Index.UN_TOKENIZED));
    doc.add(new Field("author", "����IBM OSIһһ����", Field.Store.YES, Field.Index.TOKENIZED));
    doc.add(new Field("time", Long.toString(System.currentTimeMillis()), Field.Store.YES, Field.Index.UN_TOKENIZED));
    doc.add(new Field("content", "��֪����ʲôʱ��ʼ����ʲô�������涼�и����ڣ��ﵶ�����ڣ����ͷ����ڣ�������ֽ������ڣ��ҿ�ʼ���ɣ�����������ϣ�����ʲô�����ǲ�����ڵģ�", Field.Store.NO, Field.Index.TOKENIZED));
    IndexWriter writer = getWriter();
    try {
        writer.addDocument(doc);
        writer.optimize();
    }finally {

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      Document doc = (Document)hits.doc(i);
      //ӳ���ĵ����Ե�Java������
      Object result = params.getSearchObject().newInstance();
      Enumeration fields = doc.fields();
      while(fields.hasMoreElements()){
        Field field = (Field)fields.nextElement();
        //System.out.println(field.name()+" -- "+field.stringValue());
        if(CLASSNAME_FIELD.equals(field.name()))
          continue;
        //�����ֶβ�����ӳ��
        if(!field.isStored())
          continue;
        //System.out.println("=========== begin to mapping ============");
        //String --> anything
          Class fieldType = getNestedPropertyType(result, field.name());
          //System.out.println(field.name()+", class = " + fieldType.getName());
          Object fieldValue = null;
          if(fieldType.equals(Date.class))
            fieldValue = new Date(Long.parseLong(field.stringValue()));
          else
            fieldValue = ConvertUtils.convert(field.stringValue(), fieldType);
          //System.out.println(fieldValue+", class = " + fieldValue.getClass().getName());
          setNestedProperty(result, field.name(), fieldValue);
      }
      results.add(result);
    }
    
    return results;

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    }


    private static StandardAnalyzer analyzer = new StandardAnalyzer();
    
    protected static final Field Keyword(String name, String value) {
        return new Field(name, value, Field.Store.YES, Field.Index.UN_TOKENIZED);
  }

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    protected static final Field Keyword(String name, String value) {
        return new Field(name, value, Field.Store.YES, Field.Index.UN_TOKENIZED);
  }
    
    protected static final Field Text(String name, String value){
      return new Field(name, value, Field.Store.YES, Field.Index.TOKENIZED);
    }

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    protected static final Field Text(String name, String value){
      return new Field(name, value, Field.Store.YES, Field.Index.TOKENIZED);
    }
    
    protected static final Field UnStored(String name, String value){
      return new Field(name, value, Field.Store.NO, Field.Index.TOKENIZED);
    }

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            }
            ## LUCENE2 end ##*/
            //## LUCENE3 begin ##
            String query = getQuery(row);
            Document doc = new Document();
            doc.add(new Field(LUCENE_FIELD_QUERY, query,
                    Field.Store.YES, Field.Index.NOT_ANALYZED));
            long time = System.currentTimeMillis();
            doc.add(new Field(LUCENE_FIELD_MODIFIED,
                    DateTools.timeToString(time, DateTools.Resolution.SECOND),
                    Field.Store.YES, Field.Index.NOT_ANALYZED));
            StatementBuilder buff = new StatementBuilder();
            for (int index : indexColumns) {
                String columnName = columns[index];
                String data = asString(row[index], columnTypes[index]);
                // column names that start with _
                // must be escaped to avoid conflicts
                // with internal field names (_DATA, _QUERY, _modified)
                if (columnName.startsWith(LUCENE_FIELD_COLUMN_PREFIX)) {
                    columnName = LUCENE_FIELD_COLUMN_PREFIX + columnName;
                }
                doc.add(new Field(columnName, data,
                        Field.Store.NO, Field.Index.ANALYZED));
                buff.appendExceptFirst(" ");
                buff.append(data);
            }
            Field.Store storeText = STORE_DOCUMENT_TEXT_IN_INDEX ?
                    Field.Store.YES : Field.Store.NO;
            doc.add(new Field(LUCENE_FIELD_DATA, buff.toString(), storeText,
                    Field.Index.ANALYZED));
            try {
                indexAccess.writer.addDocument(doc);
                indexAccess.writer.commit();
                // recreate Searcher with the IndexWriter's reader.

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                long dayInMillis = beginningOfDay.getTimeInMillis();
                long timeInMillis = moment.getTime() - dayInMillis;


                // need to store channel without the '#'
                doc.add(new Field("moment", DateField.dateToString(resultSet.getTimestamp("moment")), true, true, true));
                doc.add(new Field("momentDateSort", String.valueOf(dayInMillis), false, true, false));
                doc.add(new Field("momentTimeSort", String.valueOf(timeInMillis), false, true, false));
                doc.add(new Field("botname", botname, true, true, true));
                doc.add(new Field("channel", channel, true, true, true));
                doc.add(new Field("servername", servername, true, true, true));
                doc.add(new Field("nickname", resultSet.getString("nickname"), true, true, true));
                doc.add(new Field("username", resultSet.getString("username"), true, true, true));
                doc.add(new Field("hostname", resultSet.getString("hostname"), true, true, true));
                doc.add(new Field("message", resultSet.getString("message"), true, true, true));


                try
                {
                  writer.addDocument(doc, getAnalyzer());
                }

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    beginningOfDay.set(Calendar.MILLISECOND, 0);


    long dayInMillis = beginningOfDay.getTimeInMillis();
    long timeInMillis = moment.getTime() - dayInMillis;


    doc.add(new Field("moment", DateField.dateToString(moment), true, true, true));
    doc.add(new Field("momentDateSort", String.valueOf(dayInMillis), false, true, false));
    doc.add(new Field("momentTimeSort", String.valueOf(timeInMillis), false, true, false));
    doc.add(new Field("botname", botname, true, true, true));
    doc.add(new Field("channel", channelname, true, true, true));
    doc.add(new Field("servername", servername, true, true, true));
    doc.add(new Field("nickname", message.getPrefix().getNickName(), true, true, true));
    doc.add(new Field("username", message.getPrefix().getUser(), true, true, true));
    doc.add(new Field("hostname", message.getPrefix().getHost(), true, true, true));
    doc.add(new Field("message", message.getTrailing(), true, true, true));


    addDocumentToQueue(getIndexName(botname, servername, channelname), doc);
  }

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    return new BoboBrowser(newIndexReader());
  }
    
  public static Field buildMetaField(String name,String val)
  {
    Field f = new Field(name,val,Field.Store.NO,Index.NOT_ANALYZED_NO_NORMS);
    f.setOmitTermFreqAndPositions(true);
    return f;
  }

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    }  
    }
  
    public static Field buildMetaSizePayloadField(final Term term, final int size)
    {
      Field f = new Field(term.field(), new MetaTokenStream(term,size));
      return f;
    }

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