Examples of org.apache.lucene.index.FieldInfos

org.apache.lucene.index.FieldInfos
Access to the Fieldable Info file that describes document fields and whether or not they are indexed. Each segment has a separate Fieldable Info file. Objects of this class are thread-safe for multiple readers, but only one thread can be adding documents at a time, with no other reader or writer threads accessing this object.

    SegmentReader r = LuceneTestCase.getOnlySegmentReader(r0);
    String segment = r.getSegmentName();
    r.close();


    FieldInfosReader infosReader = new PreFlexRWCodec().fieldInfosFormat().getFieldInfosReader();
    FieldInfos fieldInfos = infosReader.read(directory, segment, "", IOContext.READONCE);
    String segmentFileName = IndexFileNames.segmentFileName(segment, "", Lucene3xPostingsFormat.TERMS_INDEX_EXTENSION);
    long tiiFileLength = directory.fileLength(segmentFileName);
    IndexInput input = directory.openInput(segmentFileName, newIOContext(random()));
    termEnum = new SegmentTermEnum(directory.openInput(IndexFileNames.segmentFileName(segment, "", Lucene3xPostingsFormat.TERMS_EXTENSION), newIOContext(random())), fieldInfos, false);
    int totalIndexInterval = termEnum.indexInterval * indexDivisor;

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      assertEquals(info, leftBits.get(i), rightBits.get(i));
    }
  }
  
  public void assertFieldInfosEquals(String info, IndexReader leftReader, IndexReader rightReader) throws IOException {
    FieldInfos leftInfos = MultiFields.getMergedFieldInfos(leftReader);
    FieldInfos rightInfos = MultiFields.getMergedFieldInfos(rightReader);
    
    // TODO: would be great to verify more than just the names of the fields!
    TreeSet<String> left = new TreeSet<>();
    TreeSet<String> right = new TreeSet<>();

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      {
         IndexReader reader = null;
         try
         {
            reader = ((SearchIndex)handler).getIndexReader();
            FieldInfos infos = ReaderUtil.getMergedFieldInfos(reader);
            for (FieldInfo info : infos)
            {
               fildsSet.add(info.name);
            }
         }

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    IndexReader aprioriReader = IndexReader.open(aprioriIndex, false);
    IndexReader testReader = testIndex.indexReaderFactory();


    assertEquals(aprioriReader.numDocs(), testReader.numDocs());


    final FieldInfos aprioriFieldInfos = ReaderUtil.getMergedFieldInfos(aprioriReader);


    for (FieldInfo aprioriFieldInfo : aprioriFieldInfos) {
      
      Object field = aprioriFieldInfo.name;

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    in.defaultReadObject();
    rebuildFieldInfos();
  }


  void rebuildFieldInfos() {
    fieldInfos = new FieldInfos();
    for(FieldSetting fieldSetting : fieldSettings.values()) {
      fieldInfos.add(fieldSetting.fieldName,
                     fieldSetting.indexed,
                     fieldSetting.storeTermVector,
                     false, fieldSetting.storePayloads,

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  /** Call this to get the (merged) FieldInfos for a
   *  composite reader */
  public static FieldInfos getMergedFieldInfos(IndexReader reader) {
    final List<IndexReader> subReaders = new ArrayList<IndexReader>();
    ReaderUtil.gatherSubReaders(subReaders, reader);
    final FieldInfos fieldInfos = new FieldInfos();
    for(IndexReader subReader : subReaders) {
      fieldInfos.add(subReader.getFieldInfos());
    }
    return fieldInfos;
  }

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   *            whether or not to store the start and end character offset of
   *            each token term in the text
   */
  private MemoryIndex(boolean storeOffsets) {
    this.stride = storeOffsets ? 3 : 1;
    fieldInfos = new FieldInfos();
  }

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  /** Call this to get the (merged) FieldInfos for a
   *  composite reader */
  public static FieldInfos getMergedFieldInfos(IndexReader reader) {
    final List<IndexReader> subReaders = new ArrayList<IndexReader>();
    ReaderUtil.gatherSubReaders(subReaders, reader);
    final FieldInfos fieldInfos = new FieldInfos();
    for(IndexReader subReader : subReaders) {
      fieldInfos.add(subReader.getFieldInfos());
    }
    return fieldInfos;
  }

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    /**
     * @return the index format version of the index used by the given
     * index reader.
     */
    public static IndexFormatVersion getVersion(IndexReader indexReader) {
        FieldInfos fields = ReaderUtil.getMergedFieldInfos(indexReader);
        if ((fields.fieldInfo(FieldNames.INDEX) != null && fields.fieldInfo(FieldNames.PATH) != null) 
            || indexReader.numDocs() == 0) {
           return IndexFormatVersion.V4;
        } else if (fields.fieldInfo(FieldNames.LOCAL_NAME) != null) {
            return IndexFormatVersion.V3;
        } else if (fields.fieldInfo(FieldNames.PROPERTIES_SET) != null) {
            return IndexFormatVersion.V2;
        } else {
            return IndexFormatVersion.V1;
        }
    }

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   * @param allInfos original field infos 
   * @return those of the original field infos which should not be removed.
   */
  public FieldInfos getFieldInfos(FieldInfos allInfos) {
    // for simplicity remove only fields with DEL_ALL
    FieldInfos res = new FieldInfos();
    for (FieldInfo fi: allInfos) {
      if (!deleteAll.contains(fi.name)) {
        res.add(fi);
      }
    }
    return res;    
  }

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