PerFieldDocValuesFormat
Enables per field docvalues support.
Note, when extending this class, the name (.getName) is written into the index. In order for the field to be read, the name must resolve to your implementation via .forName. This method uses Java's ServiceLoader to resolve format names.
Files written by each docvalues format have an additional suffix containing the format name. For example, in a per-field configuration instead of _1.dat filenames would look like _1_Lucene40_0.dat.
See also
ServiceLoader
Properties
Functions
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Returns a DocValuesConsumer to write docvalues to the index.
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Returns a DocValuesProducer to read docvalues from the index.
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Returns the doc values format that should be used for writing new segments of field * .