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
System.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

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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 on rewriting this query!

Fields

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m_query

Declaration
protected readonly Q m_query
Field Value
Type Description
Q
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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

Properties

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Field

Declaration
public override string Field { get; }
Property Value
Type Description
System.String
Overrides
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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
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WrappedQuery

Returns the wrapped query

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

Methods

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Equals(Object)

Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
System.Object obj
Returns
Type Description
System.Boolean
Overrides
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GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
System.Int32
Overrides
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GetSpans(AtomicReaderContext, IBits, IDictionary<Term, TermContext>)

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
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Rewrite(IndexReader)

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

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

Implements