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| <h1 id="Lucene_Net_Queries_BoostingQuery" data-uid="Lucene.Net.Queries.BoostingQuery" class="text-break">Class BoostingQuery |
| </h1> |
| <div class="markdown level0 summary"><p>The <a class="xref" href="Lucene.Net.Queries.BoostingQuery.html">BoostingQuery</a> class can be used to effectively demote results that match a given query. |
| Unlike the "NOT" clause, this still selects documents that contain undesirable terms, |
| but reduces their overall score:</p> |
| <pre><code> Query balancedQuery = new BoostingQuery(positiveQuery, negativeQuery, 0.01f);</code></pre> |
| <p>In this scenario the positiveQuery contains the mandatory, desirable criteria which is used to |
| select all matching documents, and the negativeQuery contains the undesirable elements which |
| are simply used to lessen the scores. Documents that match the negativeQuery have their score |
| multiplied by the supplied "boost" parameter, so this should be less than 1 to achieve a |
| demoting effect</p> |
| <p>This code was originally made available here: <code>[WWW] <a href="http://marc.theaimsgroup.com/?l=lucene-user&m=108058407130459&w=2">http://marc.theaimsgroup.com/?l=lucene-user&m=108058407130459&w=2</a> </code> |
| and is documented here: <code><a href="http://wiki.apache.org/lucene-java/CommunityContributions">http://wiki.apache.org/lucene-java/CommunityContributions</a></code></p> |
| </div> |
| <div class="markdown level0 conceptual"></div> |
| <div class="inheritance"> |
| <h5>Inheritance</h5> |
| <div class="level0"><span class="xref">System.Object</span></div> |
| <div class="level1"><span class="xref">Lucene.Net.Search.Query</span></div> |
| <div class="level2"><span class="xref">BoostingQuery</span></div> |
| </div> |
| <div class="inheritedMembers"> |
| <h5>Inherited Members</h5> |
| <div> |
| <span class="xref">Lucene.Net.Search.Query.Boost</span> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Search.Query.ToString()</span> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Search.Query.CreateWeight(Lucene.Net.Search.IndexSearcher)</span> |
| </div> |
| <div> |
| <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Search.Query.html#Lucene_Net_Search_Query_ExtractTerms_System_Collections_Generic_ISet_Lucene_Net_Index_Term__">Query.ExtractTerms(ISet<Term>)</a> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Search.Query.Clone()</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object, System.Object)</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.GetType()</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.MemberwiseClone()</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span> |
| </div> |
| </div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Queries.html">Lucene.Net.Queries</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Queries.dll</h6> |
| <h5 id="Lucene_Net_Queries_BoostingQuery_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public class BoostingQuery : Query</code></pre> |
| </div> |
| <h3 id="constructors">Constructors |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
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| </span> |
| <a id="Lucene_Net_Queries_BoostingQuery__ctor_" data-uid="Lucene.Net.Queries.BoostingQuery.#ctor*"></a> |
| <h4 id="Lucene_Net_Queries_BoostingQuery__ctor_Lucene_Net_Search_Query_Lucene_Net_Search_Query_System_Single_" data-uid="Lucene.Net.Queries.BoostingQuery.#ctor(Lucene.Net.Search.Query,Lucene.Net.Search.Query,System.Single)">BoostingQuery(Query, Query, Single)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public BoostingQuery(Query match, Query context, float boost)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td><span class="parametername">match</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td><span class="parametername">context</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">boost</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="methods">Methods |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
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| </span> |
| <a id="Lucene_Net_Queries_BoostingQuery_Equals_" data-uid="Lucene.Net.Queries.BoostingQuery.Equals*"></a> |
| <h4 id="Lucene_Net_Queries_BoostingQuery_Equals_System_Object_" data-uid="Lucene.Net.Queries.BoostingQuery.Equals(System.Object)">Equals(Object)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override bool Equals(object obj)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Object</span></td> |
| <td><span class="parametername">obj</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Boolean</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Search.Query.html#Lucene_Net_Search_Query_Equals_System_Object_">Query.Equals(Object)</a></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Queries_BoostingQuery_GetHashCode.md&value=---%0Auid%3A%20Lucene.Net.Queries.BoostingQuery.GetHashCode%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a> |
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| </span> |
| <a id="Lucene_Net_Queries_BoostingQuery_GetHashCode_" data-uid="Lucene.Net.Queries.BoostingQuery.GetHashCode*"></a> |
| <h4 id="Lucene_Net_Queries_BoostingQuery_GetHashCode" data-uid="Lucene.Net.Queries.BoostingQuery.GetHashCode">GetHashCode()</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override int GetHashCode()</code></pre> |
| </div> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><span class="xref">Lucene.Net.Search.Query.GetHashCode()</span></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Queries_BoostingQuery_Rewrite_Lucene_Net_Index_IndexReader_.md&value=---%0Auid%3A%20Lucene.Net.Queries.BoostingQuery.Rewrite(Lucene.Net.Index.IndexReader)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a> |
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| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Queries/BoostingQuery.cs/#L54">View Source</a> |
| </span> |
| <a id="Lucene_Net_Queries_BoostingQuery_Rewrite_" data-uid="Lucene.Net.Queries.BoostingQuery.Rewrite*"></a> |
| <h4 id="Lucene_Net_Queries_BoostingQuery_Rewrite_Lucene_Net_Index_IndexReader_" data-uid="Lucene.Net.Queries.BoostingQuery.Rewrite(Lucene.Net.Index.IndexReader)">Rewrite(IndexReader)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override Query Rewrite(IndexReader reader)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">Lucene.Net.Index.IndexReader</span></td> |
| <td><span class="parametername">reader</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><span class="xref">Lucene.Net.Search.Query.Rewrite(Lucene.Net.Index.IndexReader)</span></div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Queries_BoostingQuery_ToString_System_String_.md&value=---%0Auid%3A%20Lucene.Net.Queries.BoostingQuery.ToString(System.String)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a> |
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| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Queries/BoostingQuery.cs/#L167">View Source</a> |
| </span> |
| <a id="Lucene_Net_Queries_BoostingQuery_ToString_" data-uid="Lucene.Net.Queries.BoostingQuery.ToString*"></a> |
| <h4 id="Lucene_Net_Queries_BoostingQuery_ToString_System_String_" data-uid="Lucene.Net.Queries.BoostingQuery.ToString(System.String)">ToString(String)</h4> |
| <div class="markdown level1 summary"></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override string ToString(string field)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">field</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Search.Query.html#Lucene_Net_Search_Query_ToString_System_String_">Query.ToString(String)</a></div> |
| </article> |
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