FSTOrdTermsReader (Lucene 7.7.0 API)

java.lang.Object
- org.apache.lucene.index.Fields
- - org.apache.lucene.codecs.FieldsProducer
  - - org.apache.lucene.codecs.memory.FSTOrdTermsReader

All Implemented Interfaces:

Closeable, AutoCloseable, Iterable<String>, Accountable
```
public class FSTOrdTermsReader
extends FieldsProducer
```
FST-based terms dictionary reader. The FST index maps each term and its ord, and during seek the ord is used fetch metadata from a single block. The term dictionary is fully memory resident.

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

Constructor Summary

Constructors
Constructor Description

FSTOrdTermsReader(SegmentReadState state, PostingsReaderBase postingsReader)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`checkIntegrity()`
`void`	`close()`
`Collection<Accountable>`	`getChildResources()`
`Iterator<String>`	`iterator()`
`long`	`ramBytesUsed()`
`int`	`size()`
`Terms`	`terms(String field)`
`String`	`toString()`

Methods inherited from class org.apache.lucene.codecs.FieldsProducer
getMergeInstance

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable
forEach, spliterator

Constructor Detail

FSTOrdTermsReader

public FSTOrdTermsReader(SegmentReadState state,
                         PostingsReaderBase postingsReader)
                  throws IOException

Throws:: IOException

Method Detail
- iterator
```
public Iterator<String> iterator()
```
  Specified by:
  
  iterator in interface Iterable<String>
  
  Specified by:
  
  iterator in class Fields
- terms
```
public Terms terms(String field)
            throws IOException
```
  Specified by:
  
  terms in class Fields
  
  Throws:
  
  IOException
- size
```
public int size()
```
  Specified by:
  
  size in class Fields
- close
```
public void close()
           throws IOException
```
  Specified by:
  
  close in interface AutoCloseable
  
  Specified by:
  
  close in interface Closeable
  
  Specified by:
  
  close in class FieldsProducer
  
  Throws:
  
  IOException
- ramBytesUsed
```
public long ramBytesUsed()
```
- getChildResources
```
public Collection<Accountable> getChildResources()
```
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object
- checkIntegrity
```
public void checkIntegrity()
                    throws IOException
```
  Specified by:
  
  checkIntegrity in class FieldsProducer
  
  Throws:
  
  IOException