Exemple #1
0
        /// <summary>
        /// Validates the codec footer previously written by <see cref="WriteFooter(IndexOutput)"/>. </summary>
        /// <returns> Actual checksum value. </returns>
        /// <exception cref="IOException"> If the footer is invalid, if the checksum does not match,
        ///                     or if <paramref name="in"/> is not properly positioned before the footer
        ///                     at the end of the stream. </exception>
        public static long CheckFooter(ChecksumIndexInput @in)
        {
            ValidateFooter(@in);
            long actualChecksum   = @in.Checksum;
            long expectedChecksum = @in.ReadInt64();

            if (expectedChecksum != actualChecksum)
            {
                throw new IOException("checksum failed (hardware problem?) : expected=" + expectedChecksum.ToString("x") + " actual=" + actualChecksum.ToString("x") + " (resource=" + @in + ")");
            }
            if (@in.GetFilePointer() != @in.Length)
            {
                throw new IOException("did not read all bytes from file: read " + @in.GetFilePointer() + " vs size " + @in.Length + " (resource: " + @in + ")");
            }
            return(actualChecksum);
        }
Exemple #2
0
        public override FieldInfos Read(Directory directory, string segmentName, string segmentSuffix, IOContext context)
        {
            string             fileName = IndexFileNames.SegmentFileName(segmentName, segmentSuffix, Lucene46FieldInfosFormat.EXTENSION);
            ChecksumIndexInput input    = directory.OpenChecksumInput(fileName, context);

            bool success = false;

            try
            {
                int codecVersion = CodecUtil.CheckHeader(input, Lucene46FieldInfosFormat.CODEC_NAME, Lucene46FieldInfosFormat.FORMAT_START, Lucene46FieldInfosFormat.FORMAT_CURRENT);

                int         size  = input.ReadVInt32(); //read in the size
                FieldInfo[] infos = new FieldInfo[size];

                for (int i = 0; i < size; i++)
                {
                    string       name            = input.ReadString();
                    int          fieldNumber     = input.ReadVInt32();
                    byte         bits            = input.ReadByte();
                    bool         isIndexed       = (bits & Lucene46FieldInfosFormat.IS_INDEXED) != 0;
                    bool         storeTermVector = (bits & Lucene46FieldInfosFormat.STORE_TERMVECTOR) != 0;
                    bool         omitNorms       = (bits & Lucene46FieldInfosFormat.OMIT_NORMS) != 0;
                    bool         storePayloads   = (bits & Lucene46FieldInfosFormat.STORE_PAYLOADS) != 0;
                    IndexOptions indexOptions;
                    if (!isIndexed)
                    {
                        indexOptions = IndexOptions.NONE;
                    }
                    else if ((bits & Lucene46FieldInfosFormat.OMIT_TERM_FREQ_AND_POSITIONS) != 0)
                    {
                        indexOptions = IndexOptions.DOCS_ONLY;
                    }
                    else if ((bits & Lucene46FieldInfosFormat.OMIT_POSITIONS) != 0)
                    {
                        indexOptions = IndexOptions.DOCS_AND_FREQS;
                    }
                    else if ((bits & Lucene46FieldInfosFormat.STORE_OFFSETS_IN_POSTINGS) != 0)
                    {
                        indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS;
                    }
                    else
                    {
                        indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS;
                    }

                    // DV Types are packed in one byte
                    byte          val                       = input.ReadByte();
                    DocValuesType docValuesType             = GetDocValuesType(input, (byte)(val & 0x0F));
                    DocValuesType normsType                 = GetDocValuesType(input, (byte)((val.TripleShift(4)) & 0x0F));
                    long          dvGen                     = input.ReadInt64();
                    IDictionary <string, string> attributes = input.ReadStringStringMap();
                    infos[i] = new FieldInfo(name, isIndexed, fieldNumber, storeTermVector, omitNorms, storePayloads, indexOptions, docValuesType, normsType, attributes.AsReadOnly());
                    infos[i].DocValuesGen = dvGen;
                }

                if (codecVersion >= Lucene46FieldInfosFormat.FORMAT_CHECKSUM)
                {
                    CodecUtil.CheckFooter(input);
                }
                else
                {
#pragma warning disable 612, 618
                    CodecUtil.CheckEOF(input);
#pragma warning restore 612, 618
                }
                FieldInfos fieldInfos = new FieldInfos(infos);
                success = true;
                return(fieldInfos);
            }
            finally
            {
                if (success)
                {
                    input.Dispose();
                }
                else
                {
                    IOUtils.DisposeWhileHandlingException(input);
                }
            }
        }