/// <summary> /// Helper method that reads CFS entries from an input stream </summary> private static IDictionary <string, FileEntry> ReadEntries(IndexInputSlicer handle, Directory dir, string name) { IOException priorE = null; IndexInput stream = null; ChecksumIndexInput entriesStream = null; // read the first VInt. If it is negative, it's the version number // otherwise it's the count (pre-3.1 indexes) try { IDictionary <string, FileEntry> mapping; #pragma warning disable 612, 618 stream = handle.OpenFullSlice(); #pragma warning restore 612, 618 int firstInt = stream.ReadVInt32(); // impossible for 3.0 to have 63 files in a .cfs, CFS writer was not visible // and separate norms/etc are outside of cfs. if (firstInt == CODEC_MAGIC_BYTE1) { sbyte secondByte = (sbyte)stream.ReadByte(); sbyte thirdByte = (sbyte)stream.ReadByte(); sbyte fourthByte = (sbyte)stream.ReadByte(); if (secondByte != CODEC_MAGIC_BYTE2 || thirdByte != CODEC_MAGIC_BYTE3 || fourthByte != CODEC_MAGIC_BYTE4) { throw new CorruptIndexException("Illegal/impossible header for CFS file: " + secondByte + "," + thirdByte + "," + fourthByte); } int version = CodecUtil.CheckHeaderNoMagic(stream, CompoundFileWriter.DATA_CODEC, CompoundFileWriter.VERSION_START, CompoundFileWriter.VERSION_CURRENT); string entriesFileName = IndexFileNames.SegmentFileName( IndexFileNames.StripExtension(name), "", IndexFileNames.COMPOUND_FILE_ENTRIES_EXTENSION); entriesStream = dir.OpenChecksumInput(entriesFileName, IOContext.READ_ONCE); CodecUtil.CheckHeader(entriesStream, CompoundFileWriter.ENTRY_CODEC, CompoundFileWriter.VERSION_START, CompoundFileWriter.VERSION_CURRENT); int numEntries = entriesStream.ReadVInt32(); mapping = new Dictionary <string, FileEntry>(numEntries); for (int i = 0; i < numEntries; i++) { FileEntry fileEntry = new FileEntry(); string id = entriesStream.ReadString(); FileEntry previous = mapping.Put(id, fileEntry); if (previous != null) { throw new CorruptIndexException("Duplicate cfs entry id=" + id + " in CFS: " + entriesStream); } fileEntry.Offset = entriesStream.ReadInt64(); fileEntry.Length = entriesStream.ReadInt64(); } if (version >= CompoundFileWriter.VERSION_CHECKSUM) { CodecUtil.CheckFooter(entriesStream); } else { #pragma warning disable 612, 618 CodecUtil.CheckEOF(entriesStream); #pragma warning restore 612, 618 } } else { // TODO remove once 3.x is not supported anymore mapping = ReadLegacyEntries(stream, firstInt); } return(mapping); } catch (IOException ioe) { priorE = ioe; } finally { IOUtils.DisposeWhileHandlingException(priorE, stream, entriesStream); } // this is needed until Java 7's real try-with-resources: throw new InvalidOperationException("impossible to get here"); }