Exemplo n.º 1
0
        public static void ReadLegacyInfos(SegmentInfos infos, Directory directory, IndexInput input, int format)
        {
            infos.Version = input.ReadLong(); // read version
            infos.Counter = input.ReadInt();  // read counter
            Lucene3xSegmentInfoReader reader = new Lucene3xSegmentInfoReader();

            for (int i = input.ReadInt(); i > 0; i--) // read segmentInfos
            {
                SegmentCommitInfo siPerCommit = reader.ReadLegacySegmentInfo(directory, format, input);
                SegmentInfo       si          = siPerCommit.Info;

                if (si.Version == null)
                {
                    // Could be a 3.0 - try to open the doc stores - if it fails, it's a
                    // 2.x segment, and an IndexFormatTooOldException will be thrown,
                    // which is what we want.
                    Directory dir = directory;
                    if (Lucene3xSegmentInfoFormat.GetDocStoreOffset(si) != -1)
                    {
                        if (Lucene3xSegmentInfoFormat.GetDocStoreIsCompoundFile(si))
                        {
                            dir = new CompoundFileDirectory(dir, IndexFileNames.SegmentFileName(Lucene3xSegmentInfoFormat.GetDocStoreSegment(si), "", Lucene3xCodec.COMPOUND_FILE_STORE_EXTENSION), IOContext.READONCE, false);
                        }
                    }
                    else if (si.UseCompoundFile)
                    {
                        dir = new CompoundFileDirectory(dir, IndexFileNames.SegmentFileName(si.Name, "", IndexFileNames.COMPOUND_FILE_EXTENSION), IOContext.READONCE, false);
                    }

                    try
                    {
                        Lucene3xStoredFieldsReader.CheckCodeVersion(dir, Lucene3xSegmentInfoFormat.GetDocStoreSegment(si));
                    }
                    finally
                    {
                        // If we opened the directory, close it
                        if (dir != directory)
                        {
                            dir.Dispose();
                        }
                    }

                    // Above call succeeded, so it's a 3.0 segment. Upgrade it so the next
                    // time the segment is read, its version won't be null and we won't
                    // need to open FieldsReader every time for each such segment.
                    si.Version = "3.0";
                }
                else if (si.Version.Equals("2.x"))
                {
                    // If it's a 3x index touched by 3.1+ code, then segments record their
                    // version, whether they are 2.x ones or not. We detect that and throw
                    // appropriate exception.
                    throw new IndexFormatTooOldException("segment " + si.Name + " in resource " + input, si.Version);
                }
                infos.Add(siPerCommit);
            }

            infos.UserData = input.ReadStringStringMap();
        }
        public static void ReadLegacyInfos(SegmentInfos infos, Directory directory, IndexInput input, int format)
        {
            infos.Version = input.ReadLong(); // read version
            infos.Counter = input.ReadInt(); // read counter
            Lucene3xSegmentInfoReader reader = new Lucene3xSegmentInfoReader();
            for (int i = input.ReadInt(); i > 0; i--) // read segmentInfos
            {
                SegmentCommitInfo siPerCommit = reader.ReadLegacySegmentInfo(directory, format, input);
                SegmentInfo si = siPerCommit.Info;

                if (si.Version == null)
                {
                    // Could be a 3.0 - try to open the doc stores - if it fails, it's a
                    // 2.x segment, and an IndexFormatTooOldException will be thrown,
                    // which is what we want.
                    Directory dir = directory;
                    if (Lucene3xSegmentInfoFormat.GetDocStoreOffset(si) != -1)
                    {
                        if (Lucene3xSegmentInfoFormat.GetDocStoreIsCompoundFile(si))
                        {
                            dir = new CompoundFileDirectory(dir, IndexFileNames.SegmentFileName(Lucene3xSegmentInfoFormat.GetDocStoreSegment(si), "", Lucene3xCodec.COMPOUND_FILE_STORE_EXTENSION), IOContext.READONCE, false);
                        }
                    }
                    else if (si.UseCompoundFile)
                    {
                        dir = new CompoundFileDirectory(dir, IndexFileNames.SegmentFileName(si.Name, "", IndexFileNames.COMPOUND_FILE_EXTENSION), IOContext.READONCE, false);
                    }

                    try
                    {
                        Lucene3xStoredFieldsReader.CheckCodeVersion(dir, Lucene3xSegmentInfoFormat.GetDocStoreSegment(si));
                    }
                    finally
                    {
                        // If we opened the directory, close it
                        if (dir != directory)
                        {
                            dir.Dispose();
                        }
                    }

                    // Above call succeeded, so it's a 3.0 segment. Upgrade it so the next
                    // time the segment is read, its version won't be null and we won't
                    // need to open FieldsReader every time for each such segment.
                    si.Version = "3.0";
                }
                else if (si.Version.Equals("2.x"))
                {
                    // If it's a 3x index touched by 3.1+ code, then segments record their
                    // version, whether they are 2.x ones or not. We detect that and throw
                    // appropriate exception.
                    throw new IndexFormatTooOldException("segment " + si.Name + " in resource " + input, si.Version);
                }
                infos.Add(siPerCommit);
            }

            infos.UserData = input.ReadStringStringMap();
        }