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java.lang.Objectorg.apache.lucene.search.Searcher
org.apache.lucene.search.MultiSearcher
Implements search over a set of Searchables
.
Applications usually need only call the inherited Searcher.search(Query)
or Searcher.search(Query,Filter)
methods.
Constructor Summary | |
MultiSearcher(Searchable[] searchables)
Creates a searcher which searches searchables. |
Method Summary | |
void |
close()
Frees resources associated with this Searcher. |
protected Weight |
createWeight(Query original)
Create weight in multiple index scenario. |
Document |
doc(int n)
Expert: Returns the stored fields of document i . |
int |
docFreq(Term term)
Expert: Returns the number of documents containing term . |
Explanation |
explain(Weight weight,
int doc)
Expert: low-level implementation method Returns an Explanation that describes how doc scored against
weight . |
Searchable[] |
getSearchables()
Return the array of Searchable s this searches. |
protected int[] |
getStarts()
|
int |
maxDoc()
Expert: Returns one greater than the largest possible document number. |
Query |
rewrite(Query original)
Expert: called to re-write queries into primitive queries. |
void |
search(Weight weight,
Filter filter,
HitCollector results)
Lower-level search API. |
TopDocs |
search(Weight weight,
Filter filter,
int nDocs)
Expert: Low-level search implementation. |
TopFieldDocs |
search(Weight weight,
Filter filter,
int n,
Sort sort)
Expert: Low-level search implementation with arbitrary sorting. |
int |
searcherIndex(int n)
Deprecated. |
int |
subDoc(int n)
Returns the document number of document n within its
sub-index. |
int |
subSearcher(int n)
Returns index of the searcher for document n in the array
used to construct this searcher. |
Methods inherited from class org.apache.lucene.search.Searcher |
docFreqs, explain, getSimilarity, search, search, search, search, search, search, search, search, setSimilarity |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public MultiSearcher(Searchable[] searchables) throws IOException
Method Detail |
public Searchable[] getSearchables()
Searchable
s this searches.
protected int[] getStarts()
public void close() throws IOException
Searchable
Hits
.
close
in interface Searchable
close
in class Searcher
IOException
public int docFreq(Term term) throws IOException
Searchable
term
.
Called by search code to compute term weights.
docFreq
in interface Searchable
docFreq
in class Searcher
IOException
public Document doc(int n) throws IOException
Searchable
i
.
Called by HitCollector
implementations.
doc
in interface Searchable
doc
in class Searcher
IOException
public int searcherIndex(int n)
subSearcher(int)
instead.
public int subSearcher(int n)
n
in the array
used to construct this searcher.
public int subDoc(int n)
n
within its
sub-index.
public int maxDoc() throws IOException
Searchable
maxDoc
in interface Searchable
maxDoc
in class Searcher
IOException
public TopDocs search(Weight weight, Filter filter, int nDocs) throws IOException
Searchable
n
hits for query
, applying filter
if non-null.
Called by Hits
.
Applications should usually call Searcher.search(Query)
or
Searcher.search(Query,Filter)
instead.
search
in interface Searchable
search
in class Searcher
IOException
public TopFieldDocs search(Weight weight, Filter filter, int n, Sort sort) throws IOException
Searchable
n
hits for query
, applying
filter
if non-null, and sorting the hits by the criteria in
sort
.
Applications should usually call Searcher.search(Query,Filter,Sort)
instead.
search
in interface Searchable
search
in class Searcher
IOException
public void search(Weight weight, Filter filter, HitCollector results) throws IOException
Searchable
HitCollector.collect(int,float)
is called for every non-zero
scoring document.
HitCollector-based access to remote indexes is discouraged.
Applications should only use this if they need all of the
matching documents. The high-level search API (Searcher.search(Query)
) is usually more efficient, as it skips
non-high-scoring hits.
search
in interface Searchable
search
in class Searcher
IOException
public Query rewrite(Query original) throws IOException
Searchable
rewrite
in interface Searchable
rewrite
in class Searcher
IOException
public Explanation explain(Weight weight, int doc) throws IOException
Searchable
doc
scored against
weight
.
This is intended to be used in developing Similarity implementations, and, for good performance, should not be displayed with every hit. Computing an explanation is as expensive as executing the query over the entire index.
Applications should call Searcher.explain(Query, int)
.
explain
in interface Searchable
explain
in class Searcher
IOException
protected Weight createWeight(Query original) throws IOException
createWeight
in class Searcher
IOException
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