org.apache.lucene.search
TopFieldCollector
instead.public class TopFieldDocCollector extends TopDocCollector
HitCollector
implementation that collects the top-sorting
documents, returning them as a TopFieldDocs
. This is used by IndexSearcher
to implement TopFieldDocs
-based search.
This may be extended, overriding the collect method to, e.g.,
conditionally invoke super()
in order to filter which
documents are collected.
hq, totalHits
Constructor and Description |
---|
TopFieldDocCollector(IndexReader reader,
Sort sort,
int numHits)
Deprecated.
Construct to collect a given number of hits.
|
Modifier and Type | Method and Description |
---|---|
void |
collect(int doc,
float score)
Deprecated.
Called once for every document matching a query, with the document
number and its raw score.
|
TopDocs |
topDocs()
Deprecated.
The top-scoring hits.
|
getTotalHits
public TopFieldDocCollector(IndexReader reader, Sort sort, int numHits) throws java.io.IOException
reader
- the index to be searchedsort
- the sort criterianumHits
- the maximum number of hits to collectjava.io.IOException
public void collect(int doc, float score)
HitCollector
If, for example, an application wished to collect all of the hits for a query in a BitSet, then it might:
Searcher searcher = new IndexSearcher(indexReader); final BitSet bits = new BitSet(indexReader.maxDoc()); searcher.search(query, new HitCollector() { public void collect(int doc, float score) { bits.set(doc); } });
Note: This is called in an inner search loop. For good search
performance, implementations of this method should not call
Searcher.doc(int)
or
IndexReader.document(int)
on every
document number encountered. Doing so can slow searches by an order
of magnitude or more.
Note: The score
passed to this method is a raw score.
In other words, the score will not necessarily be a float whose value is
between 0 and 1.
collect
in class TopDocCollector
public TopDocs topDocs()
TopDocCollector
topDocs
in class TopDocCollector
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