1Lucy::Index::DataReaderU(s3e)r Contributed Perl DocumentaLtuicoyn::Index::DataReader(3)
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NAME

6       Lucy::Index::DataReader - Abstract base class for reading index data.
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SYNOPSIS

9           # Abstract base class.
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DESCRIPTION

12       DataReader is the companion class to DataWriter.  Every index component
13       will implement one of each.
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CONSTRUCTORS

16   new
17           my $reader = MyDataReader->new(
18               schema   => $seg_reader->get_schema,      # default undef
19               folder   => $seg_reader->get_folder,      # default undef
20               snapshot => $seg_reader->get_snapshot,    # default undef
21               segments => $seg_reader->get_segments,    # default undef
22               seg_tick => $seg_reader->get_seg_tick,    # default -1
23           );
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25       Abstract constructor.
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27       •   schema - A Schema.
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29       •   folder - A Folder.
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31       •   snapshot - A Snapshot.
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33       •   segments - An array of Segments.
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35       •   seg_tick - The array index of the Segment object within the
36           "segments" array that this particular DataReader is assigned to, if
37           any.  A value of -1 indicates that no Segment should be assigned.
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ABSTRACT METHODS

40   aggregator
41           my $result = $data_reader->aggregator(
42               readers => $readers,  # required
43               offsets => $offsets,  # required
44           );
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46       Create a reader which aggregates the output of several lower level
47       readers.  Return undef if such a reader is not valid.
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49       •   readers - An array of DataReaders.
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51       •   offsets - Doc id start offsets for each reader.
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METHODS

54   get_schema
55           my $schema = $data_reader->get_schema();
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57       Accessor for XschemaX member var.
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59   get_folder
60           my $folder = $data_reader->get_folder();
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62       Accessor for XfolderX member var.
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64   get_snapshot
65           my $snapshot = $data_reader->get_snapshot();
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67       Accessor for XsnapshotX member var.
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69   get_segments
70           my $arrayref = $data_reader->get_segments();
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72       Accessor for XsegmentsX member var.
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74   get_segment
75           my $segment = $data_reader->get_segment();
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77       Accessor for XsegmentX member var.
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79   get_seg_tick
80           my $int = $data_reader->get_seg_tick();
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82       Accessor for Xseg_tickX member var.
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INHERITANCE

85       Lucy::Index::DataReader isa Clownfish::Obj.
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89perl v5.34.0                      2021-07-22        Lucy::Index::DataReader(3)