Module org.elasticsearch.server

Package org.elasticsearch.index.codec.tsdb.pipeline

Class FieldDescriptor

java.lang.Object

org.elasticsearch.index.codec.tsdb.pipeline.FieldDescriptor

public final class FieldDescriptor
extends Object

Versioned envelope for the PipelineDescriptor wire format.

Every PipelineDescriptor written to .dvm metadata is prefixed with a format version VInt, enabling future format evolution without breaking segment compatibility. Block offsets and value counts are managed by the consumer/producer's writeField/readNumeric flow.

Method Summary

Modifier and Type	Method	Description
static PipelineDescriptor	read(org.apache.lucene.store.DataInput meta)	Reads a versioned pipeline descriptor from the metadata input.
static void	write(org.apache.lucene.store.DataOutput meta, PipelineDescriptor pipeline)	Writes a versioned pipeline descriptor to the metadata output.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

write

public static void write(org.apache.lucene.store.DataOutput meta,
 PipelineDescriptor pipeline)
                  throws IOException

Writes a versioned pipeline descriptor to the metadata output.

Parameters:

meta - the metadata output stream

pipeline - the pipeline descriptor to persist

Throws:

IOException - if an I/O error occurs

read

public static PipelineDescriptor read(org.apache.lucene.store.DataInput meta)
                               throws IOException

Reads a versioned pipeline descriptor from the metadata input.

Parameters:

meta - the metadata input stream

Returns:

the deserialized pipeline descriptor

Throws:

IOException - if the format version is unsupported or an I/O error occurs