Class SpanMultiTermQueryWrapper<Q>

Wraps any 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
Inheritance
object
Query
SpanQuery
SpanMultiTermQueryWrapper<Q>
Inherited Members
Namespace: Lucene.Net.Search.Spans
Assembly: Lucene.Net.dll
Syntax
public class SpanMultiTermQueryWrapper<Q> : SpanQuery, ISpanMultiTermQueryWrapper where Q : MultiTermQuery
Type Parameters
Name Description
Q

Constructors

SpanMultiTermQueryWrapper(Q)

Create a new SpanMultiTermQueryWrapper<Q>.

Declaration
public SpanMultiTermQueryWrapper(Q query)
Parameters
Type Name Description
Q query

Query to wrap.

NOTE: This will set MultiTermRewriteMethod 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 NotSupportedException on rewriting this query!

Fields

SCORING_SPAN_QUERY_REWRITE

A rewrite method that first translates each term into a SpanTermQuery in a SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query.

Declaration
public static readonly SpanRewriteMethod SCORING_SPAN_QUERY_REWRITE
Field Value
Type Description
SpanRewriteMethod
See Also

m_query

Wraps any 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
Declaration
protected readonly Q m_query
Field Value
Type Description
Q

Properties

Field

Returns the name of the field matched by this query.

Note that this may return null if the query matches no terms.
Declaration
public override string Field { get; }
Property Value
Type Description
string
Overrides

MultiTermRewriteMethod

Expert: Gets or Sets the rewrite method. This only makes sense to be a span rewrite method.

Declaration
public SpanRewriteMethod MultiTermRewriteMethod { get; set; }
Property Value
Type Description
SpanRewriteMethod

WrappedQuery

Returns the wrapped query

Declaration
public virtual Query WrappedQuery { get; }
Property Value
Type Description
Query

Methods

Equals(object)

Determines whether the specified object is equal to the current object.

Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
object obj

The object to compare with the current object.
Returns
Type Description
bool

true if the specified object is equal to the current object; otherwise, false.
Overrides

GetHashCode()

Serves as the default hash function.

Declaration
public override int GetHashCode()
Returns
Type Description
int

A hash code for the current object.
Overrides

GetSpans(AtomicReaderContext, IBits, IDictionary<Term, TermContext>)

Expert: Returns the matches for this query in an index. Used internally to search for spans.

Declaration
public override Spans GetSpans(AtomicReaderContext context, IBits acceptDocs, IDictionary<Term, TermContext> termContexts)
Parameters
Type Name Description
AtomicReaderContext context
IBits acceptDocs
IDictionary<Term, TermContext> termContexts
Returns
Type Description
Spans
Overrides

Rewrite(IndexReader)

Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Declaration
public override Query Rewrite(IndexReader reader)
Parameters
Type Name Description
IndexReader reader
Returns
Type Description
Query
Overrides

ToString(string)

Prints a query to a string, with field assumed to be the default field and omitted.

Declaration
public override string ToString(string field)
Parameters
Type Name Description
string field
Returns
Type Description
string
Overrides

Implements