| java.lang.Object org.apache.lucene.index.IndexReader org.apache.lucene.index.DirectoryIndexReader
All known Subclasses: org.apache.lucene.index.SegmentReader, org.apache.lucene.index.MultiSegmentReader,
DirectoryIndexReader | abstract class DirectoryIndexReader extends IndexReader (Code) | | IndexReader implementation that has access to a Directory.
Instances that have a SegmentInfos object (i. e. segmentInfos != null)
"own" the directory, which means that they try to acquire a write lock
whenever index modifications are performed.
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closeDirectory | protected boolean closeDirectory(Code) | | |
DirectoryIndexReader | protected DirectoryIndexReader()(Code) | | |
directory | public Directory directory()(Code) | | Returns the directory this index resides in.
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doCommit | protected void doCommit() throws IOException(Code) | | Commit changes resulting from delete, undeleteAll, or
setNorm operations
If an exception is hit, then either no changes or all
changes will have been committed to the index
(transactional semantics).
throws: IOException - if there is a low-level IO error |
finalize | protected void finalize() throws Throwable(Code) | | Release the write lock, if needed.
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getVersion | public long getVersion()(Code) | | Version number when this IndexReader was opened.
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isCurrent | public boolean isCurrent() throws CorruptIndexException, IOException(Code) | | Check whether this IndexReader is still using the
current (i.e., most recently committed) version of the
index. If a writer has committed any changes to the
index since this reader was opened, this will return
false , in which case you must open a new
IndexReader in order to see the changes. See the
description of the autoCommit
flag which controls when the
IndexWriter actually commits changes to the index.
throws: CorruptIndexException - if the index is corrupt throws: IOException - if there is a low-level IO error |
isOptimized | public boolean isOptimized()(Code) | | Checks is the index is optimized (if it has a single segment and no deletions)
true if the index is optimized; false otherwise |
rollbackCommit | void rollbackCommit()(Code) | | Rolls back state to just before the commit (this is
called by commit() if there is some exception while
committing).
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startCommit | void startCommit()(Code) | | Should internally checkpoint state that will change
during commit so that we can rollback if necessary.
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Fields inherited from org.apache.lucene.index.IndexReader | protected boolean hasChanges(Code)(Java Doc)
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Methods inherited from org.apache.lucene.index.IndexReader | protected synchronized void acquireWriteLock() throws IOException(Code)(Java Doc) final public synchronized void close() throws IOException(Code)(Java Doc) final protected synchronized void commit() throws IOException(Code)(Java Doc) protected synchronized void decRef() throws IOException(Code)(Java Doc) final public synchronized void deleteDocument(int docNum) throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException(Code)(Java Doc) final public int deleteDocuments(Term term) throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException(Code)(Java Doc) public Directory directory()(Code)(Java Doc) abstract protected void doClose() throws IOException(Code)(Java Doc) abstract protected void doCommit() throws IOException(Code)(Java Doc) abstract protected void doDelete(int docNum) throws CorruptIndexException, IOException(Code)(Java Doc) abstract protected void doSetNorm(int doc, String field, byte value) throws CorruptIndexException, IOException(Code)(Java Doc) abstract protected void doUndeleteAll() throws CorruptIndexException, IOException(Code)(Java Doc) abstract public int docFreq(Term t) throws IOException(Code)(Java Doc) public Document document(int n) throws CorruptIndexException, IOException(Code)(Java Doc) abstract public Document document(int n, FieldSelector fieldSelector) throws CorruptIndexException, IOException(Code)(Java Doc) final protected void ensureOpen() throws AlreadyClosedException(Code)(Java Doc) final public synchronized void flush() throws IOException(Code)(Java Doc) public static long getCurrentVersion(String directory) throws CorruptIndexException, IOException(Code)(Java Doc) public static long getCurrentVersion(File directory) throws CorruptIndexException, IOException(Code)(Java Doc) public static long getCurrentVersion(Directory directory) throws CorruptIndexException, IOException(Code)(Java Doc) abstract public Collection getFieldNames(FieldOption fldOption)(Code)(Java Doc) synchronized int getRefCount()(Code)(Java Doc) abstract public TermFreqVector getTermFreqVector(int docNumber, String field) throws IOException(Code)(Java Doc) abstract public void getTermFreqVector(int docNumber, String field, TermVectorMapper mapper) throws IOException(Code)(Java Doc) abstract public void getTermFreqVector(int docNumber, TermVectorMapper mapper) throws IOException(Code)(Java Doc) abstract public TermFreqVector[] getTermFreqVectors(int docNumber) throws IOException(Code)(Java Doc) public int getTermInfosIndexDivisor()(Code)(Java Doc) public long getVersion()(Code)(Java Doc) abstract public boolean hasDeletions()(Code)(Java Doc) public boolean hasNorms(String field) throws IOException(Code)(Java Doc) protected synchronized void incRef()(Code)(Java Doc) public static boolean indexExists(String directory)(Code)(Java Doc) public static boolean indexExists(File directory)(Code)(Java Doc) public static boolean indexExists(Directory directory) throws IOException(Code)(Java Doc) public boolean isCurrent() throws CorruptIndexException, IOException(Code)(Java Doc) abstract public boolean isDeleted(int n)(Code)(Java Doc) public static boolean isLocked(Directory directory) throws IOException(Code)(Java Doc) public static boolean isLocked(String directory) throws IOException(Code)(Java Doc) public boolean isOptimized()(Code)(Java Doc) public static long lastModified(String directory) throws CorruptIndexException, IOException(Code)(Java Doc) public static long lastModified(File fileDirectory) throws CorruptIndexException, IOException(Code)(Java Doc) public static long lastModified(Directory directory2) throws CorruptIndexException, IOException(Code)(Java Doc) public static void main(String[] args)(Code)(Java Doc) abstract public int maxDoc()(Code)(Java Doc) abstract public byte[] norms(String field) throws IOException(Code)(Java Doc) abstract public void norms(String field, byte[] bytes, int offset) throws IOException(Code)(Java Doc) abstract public int numDocs()(Code)(Java Doc) public static IndexReader open(String path) throws CorruptIndexException, IOException(Code)(Java Doc) public static IndexReader open(File path) throws CorruptIndexException, IOException(Code)(Java Doc) public static IndexReader open(Directory directory) throws CorruptIndexException, IOException(Code)(Java Doc) public static IndexReader open(Directory directory, IndexDeletionPolicy deletionPolicy) throws CorruptIndexException, IOException(Code)(Java Doc) public synchronized IndexReader reopen() throws CorruptIndexException, IOException(Code)(Java Doc) final public synchronized void setNorm(int doc, String field, byte value) throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException(Code)(Java Doc) public void setNorm(int doc, String field, float value) throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException(Code)(Java Doc) public void setTermInfosIndexDivisor(int indexDivisor) throws IllegalStateException(Code)(Java Doc) public TermDocs termDocs(Term term) throws IOException(Code)(Java Doc) abstract public TermDocs termDocs() throws IOException(Code)(Java Doc) public TermPositions termPositions(Term term) throws IOException(Code)(Java Doc) abstract public TermPositions termPositions() throws IOException(Code)(Java Doc) abstract public TermEnum terms() throws IOException(Code)(Java Doc) abstract public TermEnum terms(Term t) throws IOException(Code)(Java Doc) final public synchronized void undeleteAll() throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException(Code)(Java Doc) public static void unlock(Directory directory) throws IOException(Code)(Java Doc)
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