Lucene.Net.Codecs.SimpleText.SimpleTextDocValuesReader.SimpleTextDocValuesReader C# (CSharp) Method

        public SimpleTextDocValuesReader(SegmentReadState state, string ext)
        {
            DATA = state.Directory.OpenInput(
                    IndexFileNames.SegmentFileName(state.SegmentInfo.Name, state.SegmentSuffix, ext), state.Context);
            MAX_DOC = state.SegmentInfo.DocCount;
            
            while (true)
            {
                ReadLine();
                if (SCRATCH.Equals(SimpleTextDocValuesWriter.END))
                {
                    break;
                }
                Debug.Assert(StartsWith(SimpleTextDocValuesWriter.FIELD), SCRATCH.Utf8ToString());
                var fieldName = StripPrefix(SimpleTextDocValuesWriter.FIELD);
                var field = new OneField();
                
                FIELDS[fieldName] = field;

                ReadLine();
                Debug.Assert(StartsWith(SimpleTextDocValuesWriter.TYPE), SCRATCH.Utf8ToString());

                var dvType =
                    (FieldInfo.DocValuesType_e)
                        Enum.Parse(typeof (FieldInfo.DocValuesType_e), StripPrefix(SimpleTextDocValuesWriter.TYPE));

                if (dvType == FieldInfo.DocValuesType_e.NUMERIC)
                {
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.MINVALUE),
                        "got " + SCRATCH.Utf8ToString() + " field=" + fieldName + " ext=" + ext);
                    field.MinValue = Convert.ToInt64(StripPrefix(SimpleTextDocValuesWriter.MINVALUE));
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.PATTERN));
                    field.Pattern = StripPrefix(SimpleTextDocValuesWriter.PATTERN);
                    field.DataStartFilePointer = DATA.FilePointer;
                    DATA.Seek(DATA.FilePointer + (1 + field.Pattern.Length + 2)*MAX_DOC);
                }
                else if (dvType == FieldInfo.DocValuesType_e.BINARY)
                {
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.MAXLENGTH));
                    field.MaxLength = Convert.ToInt32(StripPrefix(SimpleTextDocValuesWriter.MAXLENGTH));
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.PATTERN));
                    field.Pattern = StripPrefix(SimpleTextDocValuesWriter.PATTERN);
                    field.DataStartFilePointer = DATA.FilePointer;
                    DATA.Seek(DATA.FilePointer + (9 + field.Pattern.Length + field.MaxLength + 2)*MAX_DOC);
                }
                else if (dvType == FieldInfo.DocValuesType_e.SORTED || dvType == FieldInfo.DocValuesType_e.SORTED_SET)
                {
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.NUMVALUES));
                    field.NumValues = Convert.ToInt64(StripPrefix(SimpleTextDocValuesWriter.NUMVALUES));
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.MAXLENGTH));
                    field.MaxLength = Convert.ToInt32(StripPrefix(SimpleTextDocValuesWriter.MAXLENGTH));
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.PATTERN));
                    field.Pattern = StripPrefix(SimpleTextDocValuesWriter.PATTERN);
                    ReadLine();
                    Debug.Assert(StartsWith(SimpleTextDocValuesWriter.ORDPATTERN));
                    field.OrdPattern = StripPrefix(SimpleTextDocValuesWriter.ORDPATTERN);
                    field.DataStartFilePointer = DATA.FilePointer;
                    DATA.Seek(DATA.FilePointer + (9 + field.Pattern.Length + field.MaxLength)*field.NumValues +
                              (1 + field.OrdPattern.Length)*MAX_DOC);
                }
                else
                {
                    throw new InvalidEnumArgumentException();
                }
            }

            // We should only be called from above if at least one
            // field has DVs:
            Debug.Assert(FIELDS.Count > 0);
        }