Module org.elasticsearch.server

Package org.elasticsearch.index.codec.tsdb

Interface NumericFieldReader

public interface NumericFieldReader

Reads numeric doc values for a single field during segment reading.

Each codec version provides its own implementation via AbstractTSDBDocValuesProducer.createNumericFieldReader(org.elasticsearch.index.codec.tsdb.AbstractTSDBDocValuesProducer.NumericEntry, int). The two levels are:

• Per-field: readField(org.apache.lucene.store.IndexInput, org.elasticsearch.index.codec.tsdb.AbstractTSDBDocValuesProducer.NumericEntry, int) reads the full numeric entry metadata
• Per-block: NumericFieldReader.Decoder.decodeBlock(org.apache.lucene.store.DataInput, long[], int) and NumericFieldReader.Decoder.decodeOrdinals(org.apache.lucene.store.DataInput, long[], int) decode individual blocks during iteration

See Also:

• NumericFieldWriter

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	NumericFieldReader.Decoder	Per-block decoder for numeric values and ordinals.

Method Summary

Modifier and Type	Method	Description
NumericFieldReader.Decoder	decoder()	Returns a decoder for per-block numeric value decoding.
void	readField(org.apache.lucene.store.IndexInput meta, AbstractTSDBDocValuesProducer.NumericEntry entry, int numericBlockShift)	Reads the full numeric field metadata: value counts, ordinal detection, codec-specific header, offsets, and DISI.

Method Details

readField

void readField(org.apache.lucene.store.IndexInput meta,
 AbstractTSDBDocValuesProducer.NumericEntry entry,
 int numericBlockShift)
        throws IOException

Reads the full numeric field metadata: value counts, ordinal detection, codec-specific header, offsets, and DISI.

Parameters:

meta - the metadata input stream

entry - the numeric entry to populate

numericBlockShift - the block shift for numeric encoding

Throws:

IOException

decoder

NumericFieldReader.Decoder decoder()

Returns a decoder for per-block numeric value decoding.

Returns:

a new decoder instance