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java.lang.Object org.apache.lucene.search.Query org.apache.lucene.search.FilteredQuery
public class FilteredQuery
A query that applies a filter to the results of another query.
Note: the bits are retrieved from the filter each time this query is used in a search - use a CachingWrapperFilter to avoid regenerating the bits every time.
CachingWrapperFilter
Constructor Summary | |
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FilteredQuery(Query query,
Filter filter)
Constructs a new query which applies a filter to the results of the original query. |
Method Summary | |
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Weight |
createWeight(IndexSearcher searcher)
Returns a Weight that applies the filter to the enclosed query's Weight. |
boolean |
equals(Object o)
Returns true iff o is equal to this. |
void |
extractTerms(Set<Term> terms)
Expert: adds all terms occurring in this query to the terms set. |
Filter |
getFilter()
Returns this FilteredQuery's filter |
Query |
getQuery()
Returns this FilteredQuery's (unfiltered) Query |
int |
hashCode()
Returns a hash code value for this object. |
Query |
rewrite(IndexReader reader)
Rewrites the query. |
String |
toString(String s)
Prints a user-readable version of this query. |
protected boolean |
useRandomAccess(Bits bits,
int firstFilterDoc)
Expert: decides if a filter should be executed as "random-access" or not. |
Methods inherited from class org.apache.lucene.search.Query |
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clone, getBoost, setBoost, toString |
Methods inherited from class java.lang.Object |
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finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public FilteredQuery(Query query, Filter filter)
Filter.getDocIdSet(org.apache.lucene.index.AtomicReaderContext, org.apache.lucene.util.Bits)
will be called every time this query is used in a search.
query
- Query to be filtered, cannot be null
.filter
- Filter to apply to query results, cannot be null
.Method Detail |
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protected boolean useRandomAccess(Bits bits, int firstFilterDoc)
public Weight createWeight(IndexSearcher searcher) throws IOException
createWeight
in class Query
IOException
public Query rewrite(IndexReader reader) throws IOException
MatchAllDocsQuery
it returns a ConstantScoreQuery
. Otherwise
it returns a new FilteredQuery
wrapping the rewritten query.
rewrite
in class Query
IOException
public final Query getQuery()
public final Filter getFilter()
public void extractTerms(Set<Term> terms)
Query
rewritten
form.
extractTerms
in class Query
public String toString(String s)
toString
in class Query
public boolean equals(Object o)
o
is equal to this.
equals
in class Query
public int hashCode()
hashCode
in class Query
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