Class Lucene70NormsFormat
- java.lang.Object
-
- org.apache.lucene.codecs.NormsFormat
-
- org.apache.lucene.backward_codecs.lucene70.Lucene70NormsFormat
-
public class Lucene70NormsFormat extends NormsFormat
Lucene 7.0 Score normalization format.Encodes normalization values by encoding each value with the minimum number of bytes needed to represent the range (which can be zero).
Files:
.nvd
: Norms data.nvm
: Norms metadata
-
The Norms metadata or .nvm file.
For each norms field, this stores metadata, such as the offset into the Norms data (.nvd)
Norms metadata (.dvm) --> Header,<Entry>NumFields,Footer
- Header -->
IndexHeader
- Entry --> FieldNumber, DocsWithFieldAddress, DocsWithFieldLength, NumDocsWithField, BytesPerNorm, NormsAddress
- FieldNumber -->
Int32
- DocsWithFieldAddress -->
Int64
- DocsWithFieldLength -->
Int64
- NumDocsWithField -->
Int32
- BytesPerNorm -->
byte
- NormsAddress -->
Int64
- Footer -->
CodecFooter
FieldNumber of -1 indicates the end of metadata.
NormsAddress is the pointer to the start of the data in the norms data (.nvd), or the singleton value when BytesPerValue = 0. If BytesPerValue is different from 0 then there are NumDocsWithField values to read at that offset.
DocsWithFieldAddress is the pointer to the start of the bit set containing documents that have a norm in the norms data (.nvd), or -2 if no documents have a norm value, or -1 if all documents have a norm value.
DocsWithFieldLength is the number of bytes used to encode the set of documents that have a norm.
- Header -->
-
The Norms data or .nvd file.
For each Norms field, this stores the actual per-document data (the heavy-lifting)
Norms data (.nvd) --> Header,< Data >NumFields,Footer
- Header -->
IndexHeader
- DocsWithFieldData --> Bit set of MaxDoc bits
- NormsData -->
byte
NumDocsWithField * BytesPerValue - Footer -->
CodecFooter
- Header -->
- WARNING: This API is experimental and might change in incompatible ways in the next release.
-
-
Constructor Summary
Constructors Constructor Description Lucene70NormsFormat()
Sole Constructor
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description NormsConsumer
normsConsumer(SegmentWriteState state)
NormsProducer
normsProducer(SegmentReadState state)
-
-
-
Method Detail
-
normsConsumer
public NormsConsumer normsConsumer(SegmentWriteState state) throws IOException
- Specified by:
normsConsumer
in classNormsFormat
- Throws:
IOException
-
normsProducer
public NormsProducer normsProducer(SegmentReadState state) throws IOException
- Specified by:
normsProducer
in classNormsFormat
- Throws:
IOException
-
-