Module org.apache.lucene.core
Class PerFieldPostingsFormat.FieldsReader
java.lang.Object
org.apache.lucene.index.Fields
org.apache.lucene.codecs.FieldsProducer
org.apache.lucene.codecs.perfield.PerFieldPostingsFormat.FieldsReader
- All Implemented Interfaces:
Closeable
,AutoCloseable
,Iterable<String>
- Enclosing class:
- PerFieldPostingsFormat
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final Map<String,
FieldsProducer> private final Map<String,
FieldsProducer> private final String
Fields inherited from class org.apache.lucene.index.Fields
EMPTY_ARRAY
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
Checks consistency of this reader.void
close()
Returns an instance optimized for merging.iterator()
Returns an iterator that will step through all fields names.int
size()
Returns the number of fields or -1 if the number of distinct field names is unknown.Get theTerms
for this field.toString()
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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formats
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segment
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Constructor Details
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FieldsReader
FieldsReader(PerFieldPostingsFormat.FieldsReader other) -
FieldsReader
- Throws:
IOException
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Method Details
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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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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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getMergeInstance
Description copied from class:FieldsProducer
Returns an instance optimized for merging. This instance may only be consumed in the thread that calledFieldsProducer.getMergeInstance()
.The default implementation returns
this
- Overrides:
getMergeInstance
in classFieldsProducer
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toString
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