Package org.apache.lucene.codecs.memory
Class FSTTermsReader
java.lang.Object
org.apache.lucene.index.Fields
org.apache.lucene.codecs.FieldsProducer
org.apache.lucene.codecs.memory.FSTTermsReader
- All Implemented Interfaces:
Closeable
,AutoCloseable
,Iterable<String>
FST-based terms dictionary reader.
The FST directly maps each term and its metadata, it is memory resident.
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Nested Class Summary
Nested Classes -
Field Summary
FieldsModifier and TypeFieldDescription(package private) final TreeMap<String,
FSTTermsReader.TermsReader> (package private) final PostingsReaderBase
Fields inherited from class org.apache.lucene.index.Fields
EMPTY_ARRAY
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate void
checkFieldSummary
(SegmentInfo info, IndexInput in, FSTTermsReader.TermsReader field, FSTTermsReader.TermsReader previous) void
Checks consistency of this reader.void
close()
iterator()
Returns an iterator that will step through all fields names.private void
seekDir
(IndexInput in) int
size()
Returns the number of fields or -1 if the number of distinct field names is unknown.Get theTerms
for this field.toString()
(package private) static <T> void
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
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Field Details
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fields
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postingsReader
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Constructor Details
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FSTTermsReader
- Throws:
IOException
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Method Details
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seekDir
- Throws:
IOException
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checkFieldSummary
private void checkFieldSummary(SegmentInfo info, IndexInput in, FSTTermsReader.TermsReader field, FSTTermsReader.TermsReader previous) throws IOException - Throws:
IOException
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iterator
Description copied from class:Fields
Returns an iterator that will step through all fields names. This will not return null. -
terms
Description copied from class:Fields
Get theTerms
for this field. This will return null if the field does not exist.- Specified by:
terms
in classFields
- Throws:
IOException
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size
public int size()Description copied from class:Fields
Returns the number of fields or -1 if the number of distinct field names is unknown. If >= 0,Fields.iterator()
will return as many field names. -
close
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in classFieldsProducer
- Throws:
IOException
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walk
- Throws:
IOException
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toString
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checkIntegrity
Description copied from class:FieldsProducer
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.
- Specified by:
checkIntegrity
in classFieldsProducer
- Throws:
IOException
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