Package org.apache.lucene.codecs

Class DocValuesProducer

java.lang.Object

org.apache.lucene.codecs.DocValuesProducer

All Implemented Interfaces:

Closeable, AutoCloseable, Accountable

Direct Known Subclasses:

DirectDocValuesProducer, EmptyDocValuesProducer, Lucene70DocValuesProducer, Lucene80DocValuesProducer, PerFieldDocValuesFormat.FieldsReader, SegmentDocValuesProducer, SimpleTextDocValuesReader

public abstract class DocValuesProducer
extends Object
implements Closeable, Accountable

Abstract API that produces numeric, binary, sorted, sortedset, and sortednumeric docvalues.

Field Summary

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DocValuesProducer()	Sole constructor.

Method Summary

Modifier and Type	Method	Description
abstract void	checkIntegrity()	Checks consistency of this producer
abstract BinaryDocValues	getBinary(FieldInfo field)	Returns BinaryDocValues for this field.
DocValuesProducer	getMergeInstance()	Returns an instance optimized for merging.
abstract NumericDocValues	getNumeric(FieldInfo field)	Returns NumericDocValues for this field.
abstract SortedDocValues	getSorted(FieldInfo field)	Returns SortedDocValues for this field.
abstract SortedNumericDocValues	getSortedNumeric(FieldInfo field)	Returns SortedNumericDocValues for this field.
abstract SortedSetDocValues	getSortedSet(FieldInfo field)	Returns SortedSetDocValues for this field.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources, ramBytesUsed

Methods inherited from interface java.io.Closeable

close

Constructor Details

DocValuesProducer

protected DocValuesProducer()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Details

getNumeric

public abstract NumericDocValues getNumeric(FieldInfo field)
                                     throws IOException

Returns NumericDocValues for this field. The returned instance need not be thread-safe: it will only be used by a single thread.

Throws:

IOException

getBinary

public abstract BinaryDocValues getBinary(FieldInfo field)
                                   throws IOException

Returns BinaryDocValues for this field. The returned instance need not be thread-safe: it will only be used by a single thread.

Throws:

IOException

getSorted

public abstract SortedDocValues getSorted(FieldInfo field)
                                   throws IOException

Returns SortedDocValues for this field. The returned instance need not be thread-safe: it will only be used by a single thread.

Throws:

IOException

getSortedNumeric

public abstract SortedNumericDocValues getSortedNumeric(FieldInfo field)
                                                 throws IOException

Returns SortedNumericDocValues for this field. The returned instance need not be thread-safe: it will only be used by a single thread.

Throws:

IOException

getSortedSet

public abstract SortedSetDocValues getSortedSet(FieldInfo field)
                                         throws IOException

Returns SortedSetDocValues for this field. The returned instance need not be thread-safe: it will only be used by a single thread.

Throws:

IOException

checkIntegrity

public abstract void checkIntegrity()
                             throws IOException

Checks consistency of this producer

Note that this may be costly in terms of I/O, e.g. may involve computing a checksum value against large data files.

Throws:

IOException

getMergeInstance

public DocValuesProducer getMergeInstance()

Returns an instance optimized for merging. This instance may only be consumed in the thread that called getMergeInstance().

The default implementation returns this