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| <h1 id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy" data-uid="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy" class="text-break">Class FilteredQuery.RandomAccessFilterStrategy |
| </h1> |
| <div class="markdown level0 summary"><p>A <a class="xref" href="Lucene.Net.Search.FilteredQuery.FilterStrategy.html">FilteredQuery.FilterStrategy</a> that conditionally uses a random access filter if |
| the given <a class="xref" href="Lucene.Net.Search.DocIdSet.html">DocIdSet</a> supports random access (returns a non-null value |
| from <a class="xref" href="Lucene.Net.Search.DocIdSet.html#Lucene_Net_Search_DocIdSet_Bits">Bits</a>) and |
| <a class="xref" href="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.html#Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_UseRandomAccess_Lucene_Net_Util_IBits_System_Int32_">UseRandomAccess(IBits, Int32)</a> returns</p> |
| <pre><code>true</code></pre>. Otherwise this strategy falls back to a "zig-zag join" ( |
| <p><a class="xref" href="Lucene.Net.Search.FilteredQuery.html#Lucene_Net_Search_FilteredQuery_LEAP_FROG_FILTER_FIRST_STRATEGY">LEAP_FROG_FILTER_FIRST_STRATEGY</a>) strategy .</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"><a class="xref" href="Lucene.Net.Search.FilteredQuery.FilterStrategy.html">FilteredQuery.FilterStrategy</a></div> |
| <div class="level2"><span class="xref">FilteredQuery.RandomAccessFilterStrategy</span></div> |
| </div> |
| <div class="inheritedMembers"> |
| <h5>Inherited Members</h5> |
| <div> |
| <a class="xref" href="Lucene.Net.Search.FilteredQuery.FilterStrategy.html#Lucene_Net_Search_FilteredQuery_FilterStrategy_FilteredBulkScorer_Lucene_Net_Index_AtomicReaderContext_Lucene_Net_Search_Weight_System_Boolean_Lucene_Net_Search_DocIdSet_">FilteredQuery.FilterStrategy.FilteredBulkScorer(AtomicReaderContext, Weight, Boolean, DocIdSet)</a> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object)</span> |
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| </div> |
| <div> |
| <span class="xref">System.Object.ToString()</span> |
| </div> |
| </div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Search.html">Lucene.Net.Search</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.dll</h6> |
| <h5 id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public class RandomAccessFilterStrategy : FilteredQuery.FilterStrategy</code></pre> |
| </div> |
| <h3 id="methods">Methods |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00014/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_FilteredScorer_Lucene_Net_Index_AtomicReaderContext_Lucene_Net_Search_Weight_Lucene_Net_Search_DocIdSet_.md&value=---%0Auid%3A%20Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.FilteredScorer(Lucene.Net.Index.AtomicReaderContext%2CLucene.Net.Search.Weight%2CLucene.Net.Search.DocIdSet)%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 class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/docs/4.8.0-beta00014/src/Lucene.Net/Search/FilteredQuery.cs/#L565">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_FilteredScorer_" data-uid="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.FilteredScorer*"></a> |
| <h4 id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_FilteredScorer_Lucene_Net_Index_AtomicReaderContext_Lucene_Net_Search_Weight_Lucene_Net_Search_DocIdSet_" data-uid="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.FilteredScorer(Lucene.Net.Index.AtomicReaderContext,Lucene.Net.Search.Weight,Lucene.Net.Search.DocIdSet)">FilteredScorer(AtomicReaderContext, Weight, DocIdSet)</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 Scorer FilteredScorer(AtomicReaderContext context, Weight weight, DocIdSet docIdSet)</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><a class="xref" href="Lucene.Net.Index.AtomicReaderContext.html">AtomicReaderContext</a></td> |
| <td><span class="parametername">context</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.Weight.html">Weight</a></td> |
| <td><span class="parametername">weight</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><a class="xref" href="Lucene.Net.Search.DocIdSet.html">DocIdSet</a></td> |
| <td><span class="parametername">docIdSet</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><a class="xref" href="Lucene.Net.Search.Scorer.html">Scorer</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Search.FilteredQuery.FilterStrategy.html#Lucene_Net_Search_FilteredQuery_FilterStrategy_FilteredScorer_Lucene_Net_Index_AtomicReaderContext_Lucene_Net_Search_Weight_Lucene_Net_Search_DocIdSet_">FilteredQuery.FilterStrategy.FilteredScorer(AtomicReaderContext, Weight, DocIdSet)</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-beta00014/websites/apidocs/apiSpec/new?filename=Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_UseRandomAccess_Lucene_Net_Util_IBits_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.UseRandomAccess(Lucene.Net.Util.IBits%2CSystem.Int32)%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 class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/docs/4.8.0-beta00014/src/Lucene.Net/Search/FilteredQuery.cs/#L611">View Source</a> |
| </span> |
| <a id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_UseRandomAccess_" data-uid="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.UseRandomAccess*"></a> |
| <h4 id="Lucene_Net_Search_FilteredQuery_RandomAccessFilterStrategy_UseRandomAccess_Lucene_Net_Util_IBits_System_Int32_" data-uid="Lucene.Net.Search.FilteredQuery.RandomAccessFilterStrategy.UseRandomAccess(Lucene.Net.Util.IBits,System.Int32)">UseRandomAccess(IBits, Int32)</h4> |
| <div class="markdown level1 summary"><p>Expert: decides if a filter should be executed as "random-access" or not. |
| Random-access means the filter "filters" in a similar way as deleted docs are filtered |
| in Lucene. This is faster when the filter accepts many documents. |
| However, when the filter is very sparse, it can be faster to execute the query+filter |
| as a conjunction in some cases. |
| <p> |
| The default implementation returns <code>true</code> if the first document accepted by the |
| filter is < 100. |
| <p> |
| <div class="lucene-block lucene-internal">This is a Lucene.NET INTERNAL API, use at your own risk</div></div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">protected virtual bool UseRandomAccess(IBits bits, int firstFilterDoc)</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><a class="xref" href="Lucene.Net.Util.IBits.html">IBits</a></td> |
| <td><span class="parametername">bits</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">firstFilterDoc</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> |
| </article> |
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