Package org.apache.lucene.codecs.lucene40

Class Lucene40StoredFieldsReader

java.lang.Object

org.apache.lucene.codecs.StoredFieldsReader

org.apache.lucene.codecs.lucene40.Lucene40StoredFieldsReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Cloneable

public final class Lucene40StoredFieldsReader
extends StoredFieldsReader
implements java.lang.Cloneable, java.io.Closeable

Class responsible for access to stored document fields.

It uses <segment>.fdt and <segment>.fdx; files.

See Also:

Lucene40StoredFieldsFormat

Constructor Summary

Constructors

Constructor	Description
Lucene40StoredFieldsReader(Directory d, SegmentInfo si, FieldInfos fn, IOContext context)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
Lucene40StoredFieldsReader	clone()	Returns a cloned FieldsReader that shares open IndexInputs with the original one.
void	close()	Closes the underlying IndexInput streams.
long	ramBytesUsed()	Returns approximate RAM bytes used
IndexInput	rawDocs(int[] lengths, int startDocID, int numDocs)	Returns the length in bytes of each raw document in a contiguous range of length numDocs starting with startDocID.
int	size()	Returns number of documents.
void	visitDocument(int n, StoredFieldVisitor visitor)	Visit the stored fields for document n

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Lucene40StoredFieldsReader

public Lucene40StoredFieldsReader(Directory d,
                                  SegmentInfo si,
                                  FieldInfos fn,
                                  IOContext context)
                           throws java.io.IOException

Sole constructor.

Throws:

java.io.IOException

Method Detail

clone

public Lucene40StoredFieldsReader clone()

Returns a cloned FieldsReader that shares open IndexInputs with the original one. It is the caller's job not to close the original FieldsReader until all clones are called (eg, currently SegmentReader manages this logic).

Specified by:

clone in class StoredFieldsReader

close

public final void close()
                 throws java.io.IOException

Closes the underlying IndexInput streams. This means that the Fields values will not be accessible.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException - If an I/O error occurs

size

public final int size()

Returns number of documents.

visitDocument

public final void visitDocument(int n,
                                StoredFieldVisitor visitor)
                         throws java.io.IOException

Description copied from class: StoredFieldsReader

Visit the stored fields for document n

Specified by:

visitDocument in class StoredFieldsReader

Throws:

java.io.IOException

rawDocs

public final IndexInput rawDocs(int[] lengths,
                                int startDocID,
                                int numDocs)
                         throws java.io.IOException

Returns the length in bytes of each raw document in a contiguous range of length numDocs starting with startDocID. Returns the IndexInput (the fieldStream), already seeked to the starting point for startDocID.

Throws:

java.io.IOException

ramBytesUsed

public long ramBytesUsed()

Description copied from class: StoredFieldsReader

Returns approximate RAM bytes used

Specified by:

ramBytesUsed in class StoredFieldsReader