Module org.elasticsearch.server

Package org.elasticsearch.index.mapper.blockloader

Class ConstantNull

java.lang.Object

org.elasticsearch.index.mapper.blockloader.ConstantNull

All Implemented Interfaces:

BlockLoader

public class ConstantNull
extends Object
implements BlockLoader

Load blocks with only null.

Nested Class Summary

Nested classes/interfaces inherited from interface org.elasticsearch.index.mapper.BlockLoader

BlockLoader.AggregateMetricDoubleBuilder, BlockLoader.Block, BlockLoader.BlockFactory, BlockLoader.BooleanBuilder, BlockLoader.Builder, BlockLoader.BytesRefBuilder, BlockLoader.ColumnAtATimeReader, BlockLoader.ConditionalBlockLoader, BlockLoader.Docs, BlockLoader.DoubleBuilder, BlockLoader.ExponentialHistogramBuilder, BlockLoader.FloatBuilder, BlockLoader.IntBuilder, BlockLoader.LongBuilder, BlockLoader.LongRangeBuilder, BlockLoader.OptionalColumnAtATimeReader, BlockLoader.OptionalLengthReader, BlockLoader.Reader, BlockLoader.RowStrideReader, BlockLoader.SingletonBytesRefBuilder, BlockLoader.SingletonDoubleBuilder, BlockLoader.SingletonIntBuilder, BlockLoader.SingletonLongBuilder, BlockLoader.SingletonOrdinalsBuilder, BlockLoader.SortedSetOrdinalsBuilder, BlockLoader.StoredFields, BlockLoader.TDigestBuilder

Field Summary

Fields

Modifier and Type	Field	Description
static final BlockLoader.ColumnAtATimeReader	COLUMN_READER
static final BlockLoader	INSTANCE
static final BlockLoader.RowStrideReader	ROW_READER

Method Summary

Modifier and Type	Method	Description
BlockLoader.Builder	builder(BlockLoader.BlockFactory factory, int expectedCount)	The BlockLoader.Builder for data of this type.
org.apache.lucene.util.IOFunction<CircuitBreaker,BlockLoader.ColumnAtATimeReader>	columnAtATimeReader(org.apache.lucene.index.LeafReaderContext context)	Build a column-at-a-time reader.
org.apache.lucene.index.SortedSetDocValues	ordinals(org.apache.lucene.index.LeafReaderContext context)	Load ordinals for the provided context.
BlockLoader.RowStrideReader	rowStrideReader(CircuitBreaker breaker, org.apache.lucene.index.LeafReaderContext context)	Build a row-by-row reader.
StoredFieldsSpec	rowStrideStoredFieldSpec()	What stored fields are needed by this reader.
boolean	supportsOrdinals()	Does this loader support loading bytes via calling BlockLoader.ordinals(org.apache.lucene.index.LeafReaderContext).
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final BlockLoader INSTANCE

COLUMN_READER

public static final BlockLoader.ColumnAtATimeReader COLUMN_READER

ROW_READER

public static final BlockLoader.RowStrideReader ROW_READER

Method Details

builder

public BlockLoader.Builder builder(BlockLoader.BlockFactory factory,
 int expectedCount)

Description copied from interface: BlockLoader

The BlockLoader.Builder for data of this type. Called when loading from a multi-segment or unsorted block.

Specified by:

builder in interface BlockLoader

columnAtATimeReader

public org.apache.lucene.util.IOFunction<CircuitBreaker,BlockLoader.ColumnAtATimeReader> columnAtATimeReader(org.apache.lucene.index.LeafReaderContext context)

Description copied from interface: BlockLoader

Build a column-at-a-time reader. May return null if the underlying storage needs to be loaded row-by-row. Callers should try this first, only falling back to BlockLoader.rowStrideReader(org.elasticsearch.common.breaker.CircuitBreaker, org.apache.lucene.index.LeafReaderContext) if this returns null. If this returns null then BlockLoader.rowStrideReader(org.elasticsearch.common.breaker.CircuitBreaker, org.apache.lucene.index.LeafReaderContext) may not.

Specified by:

columnAtATimeReader in interface BlockLoader

rowStrideReader

public BlockLoader.RowStrideReader rowStrideReader(CircuitBreaker breaker,
 org.apache.lucene.index.LeafReaderContext context)

Description copied from interface: BlockLoader

Build a row-by-row reader. May return null if the underlying storage prefers to be loaded column-at-a-time. Callers should try BlockLoader.columnAtATimeReader(org.apache.lucene.index.LeafReaderContext) first, only falling back to this if BlockLoader.columnAtATimeReader(org.apache.lucene.index.LeafReaderContext) returns null. This may not return null if BlockLoader.columnAtATimeReader(org.apache.lucene.index.LeafReaderContext) does.

Specified by:

rowStrideReader in interface BlockLoader

rowStrideStoredFieldSpec

public StoredFieldsSpec rowStrideStoredFieldSpec()

Description copied from interface: BlockLoader

What stored fields are needed by this reader.

Specified by:

rowStrideStoredFieldSpec in interface BlockLoader

supportsOrdinals

public boolean supportsOrdinals()

Description copied from interface: BlockLoader

Does this loader support loading bytes via calling BlockLoader.ordinals(org.apache.lucene.index.LeafReaderContext).

Specified by:

supportsOrdinals in interface BlockLoader

ordinals

public org.apache.lucene.index.SortedSetDocValues ordinals(org.apache.lucene.index.LeafReaderContext context)

Description copied from interface: BlockLoader

Load ordinals for the provided context.

Specified by:

ordinals in interface BlockLoader

toString

public String toString()

Overrides:

toString in class Object