Package org.apache.lucene.codecs
Class NormsProducer
java.lang.Object
org.apache.lucene.codecs.NormsProducer
- All Implemented Interfaces:
Closeable
,AutoCloseable
Abstract API that produces field normalization values
- WARNING: This API is experimental and might change in incompatible ways in the next release.
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionabstract void
Checks consistency of this producerReturns an instance optimized for merging.abstract NumericDocValues
ReturnsNumericDocValues
for this field.
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Constructor Details
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NormsProducer
protected NormsProducer()Sole constructor. (For invocation by subclass constructors, typically implicit.)
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Method Details
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getNorms
ReturnsNumericDocValues
for this field. The returned instance need not be thread-safe: it will only be used by a single thread. The behavior is undefined if the given field doesn't have norms enabled on itsFieldInfo
. The return value is nevernull
.- Throws:
IOException
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checkIntegrity
Checks consistency of this producerNote 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.
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getMergeInstance
Returns an instance optimized for merging. This instance may only be used from the thread that acquires it.The default implementation returns
this
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