org.apache.lucene.codecs
Class BlockTermsReader
java.lang.Object
org.apache.lucene.index.Fields
org.apache.lucene.codecs.FieldsProducer
org.apache.lucene.codecs.BlockTermsReader
- All Implemented Interfaces:
- Closeable
public class BlockTermsReader
- extends FieldsProducer
Handles a terms dict, but decouples all details of
doc/freqs/positions reading to an instance of PostingsReaderBase
. This class is reusable for
codecs that use a different format for
docs/freqs/positions (though codecs are also free to
make their own terms dict impl).
This class also interacts with an instance of TermsIndexReaderBase
, to abstract away the specific
implementation of the terms dict index.
- WARNING: This API is experimental and might change in incompatible ways in the next release.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
dirOffset
protected long dirOffset
BlockTermsReader
public BlockTermsReader(TermsIndexReaderBase indexReader,
Directory dir,
FieldInfos fieldInfos,
String segment,
PostingsReaderBase postingsReader,
IOContext context,
int termsCacheSize,
String segmentSuffix)
throws IOException
- Throws:
IOException
readHeader
protected void readHeader(IndexInput input)
throws IOException
- Throws:
IOException
seekDir
protected void seekDir(IndexInput input,
long dirOffset)
throws IOException
- Throws:
IOException
close
public void close()
throws IOException
- Specified by:
close
in interface Closeable
- Specified by:
close
in class FieldsProducer
- Throws:
IOException
iterator
public FieldsEnum iterator()
- Description copied from class:
Fields
- Returns an iterator that will step through all fields
names. This will not return null.
- Specified by:
iterator
in class Fields
terms
public Terms terms(String field)
throws IOException
- Description copied from class:
Fields
- Get the
Terms
for this field. This will return
null if the field does not exist.
- Specified by:
terms
in class Fields
- Throws:
IOException
size
public int size()
- Description copied from class:
Fields
- Returns the number of terms for all fields, or -1 if this
measure isn't stored by the codec. Note that, just like
other term measures, this measure does not take deleted
documents into account.
- Specified by:
size
in class Fields
Copyright © 2000-2012 Apache Software Foundation. All Rights Reserved.