Package com.qfs.bitmap

Interface IWritableBitmapIndex

All Superinterfaces:

IBitmapIndex, IMemoryMonitored

All Known Implementing Classes:

ABitmapIndex, QFSBitmapIndex

public interface IWritableBitmapIndex
extends IBitmapIndex

An indexing structure using bitmaps to resolve point queries and range queries. The index is multilevel, the fields of a level can have multiple values depending on the cardinality of the level. Each possible value of each level is indexed with a bitmap so that finding the rows that match a particular query resorts to AND / OR logical operations on the bitmaps.
To speedup access and minimize storage cost the values in a level are coded as positive integers. In the context of range queries, the value -1 is reserved to represent 'ANY' value on a level.

Author:

ActiveViam

Field Summary

Fields inherited from interface com.qfs.bitmap.IBitmapIndex

ANY, MATCH_FROM_ALLOWED_RATIO_THRESHOLD

Method Summary

Modifier and Type	Method	Description
int	append(int[] tuple)	Appends a tuple in the index.
int	append(IPointList source)	Appends an entire series of points.
int	append(IPointList source, int pointPosition)	Appends a tuple read from a point list in the index.
int	append(IPointList source, int from, int to)	Appends a series of points as a batch operation.
void	clear()	Clears the whole index, truncating all bitmaps to size zero.

Methods inherited from interface com.qfs.bitmap.IBitmapIndex

and, and, createBitmap, createBitmap, createOnesBitmap, dataSizeInBytes, getBitmap, getBitmaps, getLevelCardinality, getLevels, getOtherBitmaps, matchBitmap, matchBitmap, matchBitmap, matchBitmap, matchBitmap, matchBitmap, matchFromExcludedValues, matchFromIncludedValues, matchInCondition, matchProcedure, matchProcedure, or, shouldMatchFromExcludedValues, size, sizeInBytes

Methods inherited from interface com.qfs.monitoring.memory.IMemoryMonitored

getMemoryStatistic

Method Details

append

int append(int[] tuple)

Appends a tuple in the index.

Parameters:

tuple - tuple to consider

Returns:

new size of this index

append

int append(IPointList source,
 int pointPosition)

Appends a tuple read from a point list in the index.

Parameters:

source - list of points

pointPosition - index in the list of the point to append

Returns:

new size of this index

append

int append(IPointList source)

Appends an entire series of points.

Parameters:

source - list of points to append to this index

Returns:

new size of this index

append

int append(IPointList source,
 int from,
 int to)

Appends a series of points as a batch operation.

Parameters:

source - the point source

from - the starting index of the series of points to append (inclusive)

to - the end index of the series of point to append (exclusive)

Returns:

the index of the last appended point

clear

void clear()

Clears the whole index, truncating all bitmaps to size zero.