public final class StandardDirectoryReader extends DirectoryReader
DirectoryReader
.IndexReader.ReaderClosedListener
directory
Modifier and Type | Method and Description |
---|---|
protected void |
doClose()
Implements close.
|
protected DirectoryReader |
doOpenIfChanged()
Implement this method to support
DirectoryReader.openIfChanged(DirectoryReader) . |
protected DirectoryReader |
doOpenIfChanged(IndexCommit commit)
Implement this method to support
DirectoryReader.openIfChanged(DirectoryReader,IndexCommit) . |
protected DirectoryReader |
doOpenIfChanged(IndexWriter writer,
boolean applyAllDeletes)
Implement this method to support
DirectoryReader.openIfChanged(DirectoryReader,IndexWriter,boolean) . |
IndexCommit |
getIndexCommit()
Expert: return the IndexCommit that this reader has opened.
|
SegmentInfos |
getSegmentInfos()
Return the
SegmentInfos for this reader. |
long |
getVersion()
Version number when this IndexReader was opened.
|
boolean |
isCurrent()
Check whether any new changes have occurred to the
index since this reader was opened.
|
static DirectoryReader |
open(Directory directory,
SegmentInfos infos,
List<? extends LeafReader> oldReaders)
This constructor is only used for
doOpenIfChanged(SegmentInfos) , as well as NRT replication. |
String |
toString() |
directory, indexExists, listCommits, open, open, open, open, openIfChanged, openIfChanged, openIfChanged, openIfChanged
docFreq, document, getDocCount, getSequentialSubReaders, getSumDocFreq, getSumTotalTermFreq, getTermVectors, maxDoc, numDocs, readerBase, readerIndex, totalTermFreq
getContext
addReaderClosedListener, close, decRef, document, document, ensureOpen, equals, getCombinedCoreAndDeletesKey, getCoreCacheKey, getRefCount, getTermVector, hasDeletions, hashCode, incRef, leaves, numDeletedDocs, registerParentReader, removeReaderClosedListener, tryIncRef
public static DirectoryReader open(Directory directory, SegmentInfos infos, List<? extends LeafReader> oldReaders) throws IOException
doOpenIfChanged(SegmentInfos)
, as well as NRT replication.IOException
public String toString()
toString
in class CompositeReader
protected DirectoryReader doOpenIfChanged() throws IOException
DirectoryReader
DirectoryReader.openIfChanged(DirectoryReader)
.
If this reader does not support reopen, return null
, so
client code is happy. This should be consistent with DirectoryReader.isCurrent()
(should always return true
) if reopen is not supported.doOpenIfChanged
in class DirectoryReader
IOException
- if there is a low-level IO errorprotected DirectoryReader doOpenIfChanged(IndexCommit commit) throws IOException
DirectoryReader
DirectoryReader.openIfChanged(DirectoryReader,IndexCommit)
.
If this reader does not support reopen from a specific IndexCommit
,
throw UnsupportedOperationException
.doOpenIfChanged
in class DirectoryReader
IOException
- if there is a low-level IO errorprotected DirectoryReader doOpenIfChanged(IndexWriter writer, boolean applyAllDeletes) throws IOException
DirectoryReader
DirectoryReader.openIfChanged(DirectoryReader,IndexWriter,boolean)
.
If this reader does not support reopen from IndexWriter
,
throw UnsupportedOperationException
.doOpenIfChanged
in class DirectoryReader
IOException
- if there is a low-level IO errorpublic long getVersion()
DirectoryReader
This method
returns the version recorded in the commit that the
reader opened. This version is advanced every time
a change is made with IndexWriter
.
getVersion
in class DirectoryReader
public SegmentInfos getSegmentInfos()
SegmentInfos
for this reader.public boolean isCurrent() throws IOException
DirectoryReader
If this reader was created by calling DirectoryReader.open(org.apache.lucene.store.Directory)
,
then this method checks if any further commits
(see IndexWriter.commit()
) have occurred in the
directory.
If instead this reader is a near real-time reader
(ie, obtained by a call to DirectoryReader.open(IndexWriter)
, or by calling DirectoryReader.openIfChanged(org.apache.lucene.index.DirectoryReader)
on a near real-time reader), then this method checks if
either a new commit has occurred, or any new
uncommitted changes have taken place via the writer.
Note that even if the writer has only performed
merging, this method will still return false.
In any event, if this returns false, you should call
DirectoryReader.openIfChanged(org.apache.lucene.index.DirectoryReader)
to get a new reader that sees the
changes.
isCurrent
in class DirectoryReader
IOException
- if there is a low-level IO errorprotected void doClose() throws IOException
IndexReader
doClose
in class IndexReader
IOException
public IndexCommit getIndexCommit() throws IOException
DirectoryReader
getIndexCommit
in class DirectoryReader
IOException
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