public final class CoveringQuery extends Query implements Accountable
Query
that allows to have a configurable number or required
matches per document. This is typically useful in order to build queries
whose query terms must all appear in documents.Constructor and Description |
---|
CoveringQuery(Collection<Query> queries,
LongValuesSource minimumNumberMatch)
Sole constructor.
|
Modifier and Type | Method and Description |
---|---|
Weight |
createWeight(IndexSearcher searcher,
ScoreMode scoreMode,
float boost)
Expert: Constructs an appropriate Weight implementation for this query.
|
boolean |
equals(Object obj)
Override and implement query instance equivalence properly in a subclass.
|
int |
hashCode()
Override and implement query hash code properly in a subclass.
|
long |
ramBytesUsed()
Return the memory usage of this object in bytes.
|
Query |
rewrite(IndexReader reader)
Expert: called to re-write queries into primitive queries.
|
String |
toString(String field)
Prints a query to a string, with
field assumed to be the
default field and omitted. |
void |
visit(QueryVisitor visitor)
Recurse through the query tree, visiting any child queries
|
classHash, sameClassAs, toString
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
getChildResources
public CoveringQuery(Collection<Query> queries, LongValuesSource minimumNumberMatch)
queries
- Sub queries to match.minimumNumberMatch
- Per-document long value that records how many queries
should match. Values that are less than 1 are treated
like 1: only documents that have at least one
matching clause will be considered matches. Documents
that do not have a value for minimumNumberMatch
do not match.public String toString(String field)
Query
field
assumed to be the
default field and omitted.public boolean equals(Object obj)
Query
QueryCache
works properly.
Typically a query will be equal to another only if it's an instance of
the same class and its document-filtering properties are identical that other
instance. Utility methods are provided for certain repetitive code.equals
in class Query
Query.sameClassAs(Object)
,
Query.classHash()
public int hashCode()
Query
QueryCache
works properly.hashCode
in class Query
Query.equals(Object)
public long ramBytesUsed()
Accountable
ramBytesUsed
in interface Accountable
public Query rewrite(IndexReader reader) throws IOException
Query
rewrite
in class Query
IOException
public void visit(QueryVisitor visitor)
Query
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException
Query
Only implemented by primitive queries, which re-write to themselves.
createWeight
in class Query
scoreMode
- How the produced scorers will be consumed.boost
- The boost that is propagated by the parent queries.IOException
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