public class SpanMultiTermQueryWrapper<Q extends MultiTermQuery> extends SpanQuery
MultiTermQuery
as a SpanQuery
,
so it can be nested within other SpanQuery classes.
The query is rewritten by default to a SpanOrQuery
containing
the expanded terms, but this can be customized.
Example:
WildcardQuery wildcard = new WildcardQuery(new Term("field", "bro?n")); SpanQuery spanWildcard = new SpanMultiTermQueryWrapper<WildcardQuery>(wildcard); // do something with spanWildcard, such as use it in a SpanFirstQuery
Modifier and Type | Class and Description |
---|---|
static class |
SpanMultiTermQueryWrapper.SpanRewriteMethod
Abstract class that defines how the query is rewritten.
|
static class |
SpanMultiTermQueryWrapper.TopTermsSpanBooleanQueryRewrite
A rewrite method that first translates each term into a SpanTermQuery in a
BooleanClause.Occur.SHOULD clause in a BooleanQuery, and keeps the
scores as computed by the query. |
Modifier and Type | Field and Description |
---|---|
protected Q |
query |
static SpanMultiTermQueryWrapper.SpanRewriteMethod |
SCORING_SPAN_QUERY_REWRITE
A rewrite method that first translates each term into a SpanTermQuery in a
BooleanClause.Occur.SHOULD clause in a BooleanQuery, and keeps the
scores as computed by the query. |
Constructor and Description |
---|
SpanMultiTermQueryWrapper(Q query)
Create a new SpanMultiTermQueryWrapper.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object obj) |
String |
getField()
Returns the name of the field matched by this query.
|
SpanMultiTermQueryWrapper.SpanRewriteMethod |
getRewriteMethod()
Expert: returns the rewriteMethod
|
Spans |
getSpans(AtomicReaderContext context,
Bits acceptDocs,
Map<Term,TermContext> termContexts)
Expert: Returns the matches for this query in an index.
|
int |
hashCode() |
Query |
rewrite(IndexReader reader)
Expert: called to re-write queries into primitive queries.
|
void |
setRewriteMethod(SpanMultiTermQueryWrapper.SpanRewriteMethod rewriteMethod)
Expert: sets the rewrite method.
|
String |
toString(String field)
Prints a query to a string, with
field assumed to be the
default field and omitted. |
createWeight
protected final Q extends MultiTermQuery query
public static final SpanMultiTermQueryWrapper.SpanRewriteMethod SCORING_SPAN_QUERY_REWRITE
BooleanClause.Occur.SHOULD
clause in a BooleanQuery, and keeps the
scores as computed by the query.public SpanMultiTermQueryWrapper(Q query)
query
- Query to wrap.
NOTE: This will call MultiTermQuery.setRewriteMethod(MultiTermQuery.RewriteMethod)
on the wrapped query
, changing its rewrite method to a suitable one for spans.
Be sure to not change the rewrite method on the wrapped query afterwards! Doing so will
throw UnsupportedOperationException
on rewriting this query!
public final SpanMultiTermQueryWrapper.SpanRewriteMethod getRewriteMethod()
public final void setRewriteMethod(SpanMultiTermQueryWrapper.SpanRewriteMethod rewriteMethod)
public Spans getSpans(AtomicReaderContext context, Bits acceptDocs, Map<Term,TermContext> termContexts) throws IOException
SpanQuery
getSpans
in class SpanQuery
IOException
public String getField()
SpanQuery
public String toString(String field)
Query
field
assumed to be the
default field and omitted.public Query rewrite(IndexReader reader) throws IOException
Query
rewrite
in class Query
IOException
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