org.apache.lucene.codecs

Class FieldsProducer

java.lang.Object

org.apache.lucene.index.Fields

org.apache.lucene.codecs.FieldsProducer

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<String>, Accountable

Direct Known Subclasses:

BlockTreeTermsReader

public abstract class FieldsProducer
extends Fields
implements Closeable, Accountable

Abstract API that produces terms, doc, freq, prox, offset and payloads postings.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields inherited from class org.apache.lucene.index.Fields

EMPTY_ARRAY

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

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FieldsProducer() Sole constructor.

Method Summary

Modifier and Type	Method and Description
abstract void	checkIntegrity() Checks consistency of this reader.
abstract void	close()
FieldsProducer	getMergeInstance() Returns an instance optimized for merging.

Methods inherited from class org.apache.lucene.index.Fields

iterator, size, terms

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.lang.Iterable

forEach, spliterator

Constructor Detail

FieldsProducer

protected FieldsProducer()

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

Method Detail

close

public abstract void close()
                    throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

checkIntegrity

public abstract void checkIntegrity()
                             throws IOException

Checks consistency of this reader.

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

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

getMergeInstance

public FieldsProducer getMergeInstance()

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

The default implementation returns this