org.apache.blur.filter
Class IndexFileBitSetIterator
java.lang.Object
org.apache.lucene.search.DocIdSetIterator
org.apache.blur.filter.IndexFileBitSetIterator
public class IndexFileBitSetIterator
- extends org.apache.lucene.search.DocIdSetIterator
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.
Fields inherited from class org.apache.lucene.search.DocIdSetIterator |
NO_MORE_DOCS |
Method Summary |
int |
advance(int target)
|
long |
cost()
|
int |
docID()
|
int |
nextDoc()
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(); } |
IndexFileBitSetIterator
public IndexFileBitSetIterator(org.apache.lucene.store.IndexInput indexInput)
nextDoc
public int nextDoc()
- 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(); }
- Specified by:
nextDoc
in class org.apache.lucene.search.DocIdSetIterator
advance
public int advance(int target)
- Specified by:
advance
in class org.apache.lucene.search.DocIdSetIterator
docID
public int docID()
- Specified by:
docID
in class org.apache.lucene.search.DocIdSetIterator
cost
public long cost()
- Specified by:
cost
in class org.apache.lucene.search.DocIdSetIterator
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