Lucene.Net/Index/FieldsWriter.cs

   1 using System;
   2 using System.Collections;
   3
   4 using Lucene.Net.Store;
   5 using Lucene.Net.Documents;
   6
   7 namespace Lucene.Net.Index
   8 {
   9         /* ====================================================================
  10          * The Apache Software License, Version 1.1
  11          *
  12          * Copyright (c) 2001 The Apache Software Foundation.  All rights
  13          * reserved.
  14          *
  15          * Redistribution and use in source and binary forms, with or without
  16          * modification, are permitted provided that the following conditions
  17          * are met:
  18          *
  19          * 1. Redistributions of source code must retain the above copyright
  20          *    notice, this list of conditions and the following disclaimer.
  21          *
  22          * 2. Redistributions in binary form must reproduce the above copyright
  23          *    notice, this list of conditions and the following disclaimer in
  24          *    the documentation and/or other materials provided with the
  25          *    distribution.
  26          *
  27          * 3. The end-user documentation included with the redistribution,
  28          *    if any, must include the following acknowledgment:
  29          *       "This product includes software developed by the
  30          *        Apache Software Foundation (http://www.apache.org/)."
  31          *    Alternately, this acknowledgment may appear in the software itself,
  32          *    if and wherever such third-party acknowledgments normally appear.
  33          *
  34          * 4. The names "Apache" and "Apache Software Foundation" and
  35          *    "Apache Lucene" must not be used to endorse or promote products
  36          *    derived from this software without prior written permission. For
  37          *    written permission, please contact apache@apache.org.
  38          *
  39          * 5. Products derived from this software may not be called "Apache",
  40          *    "Apache Lucene", nor may "Apache" appear in their name, without
  41          *    prior written permission of the Apache Software Foundation.
  42          *
  43          * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  44          * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  45          * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  46          * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  47          * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48          * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49          * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  50          * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  51          * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  52          * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  53          * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54          * SUCH DAMAGE.
  55          * ====================================================================
  56          *
  57          * This software consists of voluntary contributions made by many
  58          * individuals on behalf of the Apache Software Foundation.  For more
  59          * information on the Apache Software Foundation, please see
  60          * <http://www.apache.org/>.
  61          */
  62
  63         sealed class FieldsWriter
  64         {
  65                 private FieldInfos fieldInfos;
  66                 private OutputStream fieldsStream;
  67                 private OutputStream indexStream;
  68
  69                 internal FieldsWriter(Directory d, String segment, FieldInfos fn)
  70                 {
  71                         fieldInfos = fn;
  72                         fieldsStream = d.CreateFile(segment + ".fdt");
  73                         indexStream = d.CreateFile(segment + ".fdx");
  74                 }
  75
  76                 internal void Close()
  77                 {
  78                         fieldsStream.Close();
  79                         indexStream.Close();
  80                 }
  81
  82                 internal void AddDocument(Document doc)
  83                 {
  84                         indexStream.WriteLong(fieldsStream.GetFilePointer());
  85
  86                         int storedCount = 0;
  87                         foreach (Field field in doc.Fields())
  88                         {
  89                                 if (field.IsStored())
  90                                         storedCount++;
  91                         }
  92                         fieldsStream.WriteVInt(storedCount);
  93
  94                         foreach (Field field in doc.Fields())
  95                         {
  96                                 if (field.IsStored())
  97                                 {
  98                                         fieldsStream.WriteVInt(fieldInfos.FieldNumber(field.Name()));
  99
 100                                         byte bits = 0;
 101                                         if (field.IsTokenized())
 102                                                 bits |= 1;
 103                                         fieldsStream.WriteByte(bits);
 104
 105                                         fieldsStream.WriteString(field.StringValue());
 106                                 }
 107                         }
 108                 }
 109         }
 110 }