C# Class Lucene.Net.Util.OpenBitSetIterator

An iterator to iterate over set bits in an OpenBitSet. this is faster than nextSetBit() for iterating over the complete set of bits, especially when the density of the bits set is high.

Inheritance: Lucene.Net.Search.DocIdSetIterator

Datei anzeigen Open project: synhershko/lucene.net Class Usage Examples

Public Methods

Method	Description
Advance ( int target ) : int
DocID ( ) : int
NextDoc ( ) : int	alternate shift implementations // 32 bit shifts, but a long shift needed at the end private void shift2() { int y = (int)word; if (y==0) {wordShift +=32; y = (int)(word >>>32); } if ((y & 0x0000FFFF) == 0) { wordShift +=16; y>>>=16; } if ((y & 0x000000FF) == 0) { wordShift +=8; y>>>=8; } indexArray = bitlist[y & 0xff]; word >>>= (wordShift +1); } private void shift3() { int lower = (int)word; int lowByte = lower & 0xff; if (lowByte != 0) { indexArray=bitlist[lowByte]; return; } shift(); } **
OpenBitSetIterator ( OpenBitSet obs ) : System
OpenBitSetIterator ( long bits, int numWords ) : System

Private Methods

Method	Description
Shift ( ) : void

Method Details

Advance() public method

public Advance ( int target ) : int
target	int
return	int

DocID() public method

public DocID ( ) : int
return	int

NextDoc() public method

** alternate shift implementations // 32 bit shifts, but a long shift needed at the end private void shift2() { int y = (int)word; if (y==0) {wordShift +=32; y = (int)(word >>>32); } if ((y & 0x0000FFFF) == 0) { wordShift +=16; y>>>=16; } if ((y & 0x000000FF) == 0) { wordShift +=8; y>>>=8; } indexArray = bitlist[y & 0xff]; word >>>= (wordShift +1); } private void shift3() { int lower = (int)word; int lowByte = lower & 0xff; if (lowByte != 0) { indexArray=bitlist[lowByte]; return; } shift(); } ****

public NextDoc ( ) : int
return	int

OpenBitSetIterator() public method

public OpenBitSetIterator ( OpenBitSet obs ) : System
obs	OpenBitSet
return	System

OpenBitSetIterator() public method

public OpenBitSetIterator ( long bits, int numWords ) : System
bits	long
numWords	int
return	System