Class PerFieldPostingsFormat.FieldsReader
- java.lang.Object
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- org.apache.lucene.index.Fields
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- org.apache.lucene.codecs.FieldsProducer
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- org.apache.lucene.codecs.perfield.PerFieldPostingsFormat.FieldsReader
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
,java.lang.Iterable<java.lang.String>
,Accountable
- Enclosing class:
- PerFieldPostingsFormat
private static class PerFieldPostingsFormat.FieldsReader extends FieldsProducer
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Field Summary
Fields Modifier and Type Field Description private static long
BASE_RAM_BYTES_USED
private java.util.Map<java.lang.String,FieldsProducer>
fields
private java.util.Map<java.lang.String,FieldsProducer>
formats
private java.lang.String
segment
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Fields inherited from class org.apache.lucene.index.Fields
EMPTY_ARRAY
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Constructor Summary
Constructors Constructor Description FieldsReader(PerFieldPostingsFormat.FieldsReader other)
FieldsReader(SegmentReadState readState)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
checkIntegrity()
Checks consistency of this reader.void
close()
java.util.Collection<Accountable>
getChildResources()
Returns nested resources of this class.FieldsProducer
getMergeInstance()
Returns an instance optimized for merging.java.util.Iterator<java.lang.String>
iterator()
Returns an iterator that will step through all fields names.long
ramBytesUsed()
Return the memory usage of this object in bytes.int
size()
Returns the number of fields or -1 if the number of distinct field names is unknown.Terms
terms(java.lang.String field)
Get theTerms
for this field.java.lang.String
toString()
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Field Detail
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BASE_RAM_BYTES_USED
private static final long BASE_RAM_BYTES_USED
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fields
private final java.util.Map<java.lang.String,FieldsProducer> fields
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formats
private final java.util.Map<java.lang.String,FieldsProducer> formats
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segment
private final java.lang.String segment
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Constructor Detail
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FieldsReader
FieldsReader(PerFieldPostingsFormat.FieldsReader other)
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FieldsReader
public FieldsReader(SegmentReadState readState) throws java.io.IOException
- Throws:
java.io.IOException
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Method Detail
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iterator
public java.util.Iterator<java.lang.String> iterator()
Description copied from class:Fields
Returns an iterator that will step through all fields names. This will not return null.
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terms
public Terms terms(java.lang.String field) throws java.io.IOException
Description copied from class:Fields
Get theTerms
for this field. This will return null if the field does not exist.
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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.
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close
public void close() throws java.io.IOException
- Specified by:
close
in interfacejava.lang.AutoCloseable
- Specified by:
close
in interfacejava.io.Closeable
- Specified by:
close
in classFieldsProducer
- Throws:
java.io.IOException
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ramBytesUsed
public long ramBytesUsed()
Description copied from interface:Accountable
Return the memory usage of this object in bytes. Negative values are illegal.
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getChildResources
public java.util.Collection<Accountable> getChildResources()
Description copied from interface:Accountable
Returns nested resources of this class. The result should be a point-in-time snapshot (to avoid race conditions).- See Also:
Accountables
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checkIntegrity
public void checkIntegrity() throws java.io.IOException
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:
java.io.IOException
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getMergeInstance
public FieldsProducer 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
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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