gate.creole.annic.apache.lucene.index
Class TermInfosReader

java.lang.Object
  gate.creole.annic.apache.lucene.index.TermInfosReader

final class TermInfosReader
extends Object

This stores a monotonically increasing set of pairs in a Directory. Pairs are accessed either by Term or by ordinal position the set.

Field Summary

private Directory	directory
private ThreadLocal	enumerators
private FieldInfos	fieldInfos
(package private) TermInfo[]	indexInfos
(package private) long[]	indexPointers
(package private) Term[]	indexTerms
private SegmentTermEnum	origEnum
private String	segment
private long	size

Constructor Summary

TermInfosReader(Directory dir, String seg, FieldInfos fis)

Method Summary

(package private) void	close()
(package private) Term	get(int position) Returns the nth term in the set.
(package private) TermInfo	get(Term term) Returns the TermInfo for a Term in the set, or null.
private SegmentTermEnum	getEnum()
private int	getIndexOffset(Term term) Returns the offset of the greatest index entry which is less than or equal to term.
(package private) long	getPosition(Term term) Returns the position of a Term in the set or -1.
int	getSkipInterval()
private void	readIndex()
private Term	scanEnum(int position)
private TermInfo	scanEnum(Term term) Scans within block for matching term.
private void	seekEnum(int indexOffset)
(package private) long	size() Returns the number of term/value pairs in the set.
SegmentTermEnum	terms() Returns an enumeration of all the Terms and TermInfos in the set.
SegmentTermEnum	terms(Term term) Returns an enumeration of terms starting at or after the named term.

Methods inherited from class java.lang.Object

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

Field Detail

directory

private Directory directory

segment

private String segment

fieldInfos

private FieldInfos fieldInfos

enumerators

private ThreadLocal enumerators

origEnum

private SegmentTermEnum origEnum

size

private long size

indexTerms

Term[] indexTerms

indexInfos

TermInfo[] indexInfos

indexPointers

long[] indexPointers

Constructor Detail

TermInfosReader

TermInfosReader(Directory dir,
                String seg,
                FieldInfos fis)
          throws IOException

Throws:

IOException

Method Detail

getSkipInterval

public int getSkipInterval()

close

final void close()
          throws IOException

Throws:

IOException

size

final long size()

Returns the number of term/value pairs in the set.

getEnum

private SegmentTermEnum getEnum()

readIndex

private final void readIndex()
                      throws IOException

Throws:

IOException

getIndexOffset

private final int getIndexOffset(Term term)
                          throws IOException

Returns the offset of the greatest index entry which is less than or equal to term.

Throws:

IOException

seekEnum

private final void seekEnum(int indexOffset)
                     throws IOException

Throws:

IOException

get

TermInfo get(Term term)
       throws IOException

Returns the TermInfo for a Term in the set, or null.

Throws:

IOException

scanEnum

private final TermInfo scanEnum(Term term)
                         throws IOException

Scans within block for matching term.

Throws:

IOException

get

final Term get(int position)
        throws IOException

Returns the nth term in the set.

Throws:

IOException

scanEnum

private final Term scanEnum(int position)
                     throws IOException

Throws:

IOException

getPosition

final long getPosition(Term term)
                throws IOException

Returns the position of a Term in the set or -1.

Throws:

IOException

terms

public SegmentTermEnum terms()

Returns an enumeration of all the Terms and TermInfos in the set.

terms

public SegmentTermEnum terms(Term term)
                      throws IOException

Returns an enumeration of terms starting at or after the named term.

Throws:

IOException