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| |
| <h1 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal" class="text-break">Class CompactLabelToOrdinal |
| </h1> |
| <div class="markdown level0 summary"><p>This is a very efficient <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html">LabelToOrdinal</a> implementation that uses a |
| <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CharBlockArray</span> to store all labels and a configurable number of <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.HashArray</span>s to |
| reference the labels. |
| <p> |
| Since the <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.HashArray</span>s don't handle collisions, a <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.CollisionMap.html">CollisionMap</a> is used |
| to store the colliding labels. |
| </p> |
| <p> |
| This data structure grows by adding a new HashArray whenever the number of |
| collisions in the <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.CollisionMap.html">CollisionMap</a> exceeds <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.loadFactor</span> |
| <code>GetMaxOrdinal().</code> Growing also includes reinserting all colliding |
| labels into the <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.HashArray</span>s to possibly reduce the number of collisions.</p> |
| <p>For setting the <span class="xref">Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.loadFactor</span> see |
| <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal__ctor_System_Int32_System_Single_System_Int32_">CompactLabelToOrdinal(Int32, Single, Int32)</a>. |
| </p> |
| <p> |
| This data structure has a much lower memory footprint (~30%) compared to a |
| Java HashMap<String, Integer>. It also only uses a small fraction of objects |
| a HashMap would use, thus limiting the GC overhead. Ingestion speed was also |
| ~50% faster compared to a HashMap for 3M unique labels.</p> |
| <div class="lucene-block lucene-experimental">This is a Lucene.NET EXPERIMENTAL API, use at your own risk</div><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.Facet.Taxonomy.WriterCache.LabelToOrdinal.html">LabelToOrdinal</a></div> |
| <div class="level2"><span class="xref">CompactLabelToOrdinal</span></div> |
| </div> |
| <div class="inheritedMembers"> |
| <h5>Inherited Members</h5> |
| <div> |
| <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_LabelToOrdinal_m_counter">LabelToOrdinal.m_counter</a> |
| </div> |
| <div> |
| <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_LabelToOrdinal_INVALID_ORDINAL">LabelToOrdinal.INVALID_ORDINAL</a> |
| </div> |
| <div> |
| <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_LabelToOrdinal_MaxOrdinal">LabelToOrdinal.MaxOrdinal</a> |
| </div> |
| <div> |
| <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_LabelToOrdinal_GetNextOrdinal">LabelToOrdinal.GetNextOrdinal()</a> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object)</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.Equals(System.Object, System.Object)</span> |
| </div> |
| <div> |
| <span class="xref">System.Object.GetHashCode()</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> |
| <span class="xref">System.Object.ToString()</span> |
| </div> |
| </div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.html">Lucene.Net.Facet.Taxonomy.WriterCache</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Facet.dll</h6> |
| <h5 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public class CompactLabelToOrdinal : LabelToOrdinal</code></pre> |
| </div> |
| <h3 id="constructors">Constructors |
| </h3> |
| <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_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal__ctor_System_Int32_System_Single_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.%23ctor(System.Int32%2CSystem.Single%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L79">View Source</a> |
| </span> |
| <a id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal__ctor_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.#ctor*"></a> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal__ctor_System_Int32_System_Single_System_Int32_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.#ctor(System.Int32,System.Single,System.Int32)">CompactLabelToOrdinal(Int32, Single, Int32)</h4> |
| <div class="markdown level1 summary"><p>Sole constructor.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public CompactLabelToOrdinal(int initialCapacity, float loadFactor, int numHashArrays)</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.Int32</span></td> |
| <td><span class="parametername">initialCapacity</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">loadFactor</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">numHashArrays</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="fields">Fields |
| </h3> |
| <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_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_DefaultLoadFactor.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.DefaultLoadFactor%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L54">View Source</a> |
| </span> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_DefaultLoadFactor" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.DefaultLoadFactor">DefaultLoadFactor</h4> |
| <div class="markdown level1 summary"><p>Default maximum load factor. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public const float DefaultLoadFactor = 0.15F</code></pre> |
| </div> |
| <h5 class="fieldValue">Field Value</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.Single</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <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_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_TERMINATOR_CHAR.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.TERMINATOR_CHAR%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L56">View Source</a> |
| </span> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_TERMINATOR_CHAR" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.TERMINATOR_CHAR">TERMINATOR_CHAR</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 const char TERMINATOR_CHAR = '\uffff'</code></pre> |
| </div> |
| <h5 class="fieldValue">Field Value</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.Char</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="properties">Properties |
| </h3> |
| <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_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_SizeOfMap.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.SizeOfMap%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L70">View Source</a> |
| </span> |
| <a id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_SizeOfMap_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.SizeOfMap*"></a> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_SizeOfMap" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.SizeOfMap">SizeOfMap</h4> |
| <div class="markdown level1 summary"><p>How many labels. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual int SizeOfMap { get; }</code></pre> |
| </div> |
| <h5 class="propertyValue">Property Value</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> |
| <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-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_AddLabel_Lucene_Net_Facet_Taxonomy_FacetLabel_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.AddLabel(Lucene.Net.Facet.Taxonomy.FacetLabel%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00010/src/Lucene.Net.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L116">View Source</a> |
| </span> |
| <a id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_AddLabel_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.AddLabel*"></a> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_AddLabel_Lucene_Net_Facet_Taxonomy_FacetLabel_System_Int32_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.AddLabel(Lucene.Net.Facet.Taxonomy.FacetLabel,System.Int32)">AddLabel(FacetLabel, Int32)</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 void AddLabel(FacetLabel label, int ordinal)</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.Facet.Taxonomy.FacetLabel.html">FacetLabel</a></td> |
| <td><span class="parametername">label</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">ordinal</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Facet.Taxonomy.WriterCache.LabelToOrdinal.html#Lucene_Net_Facet_Taxonomy_WriterCache_LabelToOrdinal_AddLabel_Lucene_Net_Facet_Taxonomy_FacetLabel_System_Int32_">LabelToOrdinal.AddLabel(FacetLabel, Int32)</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_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_GetOrdinal_Lucene_Net_Facet_Taxonomy_FacetLabel_.md&value=---%0Auid%3A%20Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.GetOrdinal(Lucene.Net.Facet.Taxonomy.FacetLabel)%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.Facet/Taxonomy/WriterCache/CompactLabelToOrdinal.cs/#L139">View Source</a> |
| </span> |
| <a id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_GetOrdinal_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.GetOrdinal*"></a> |
| <h4 id="Lucene_Net_Facet_Taxonomy_WriterCache_CompactLabelToOrdinal_GetOrdinal_Lucene_Net_Facet_Taxonomy_FacetLabel_" data-uid="Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.GetOrdinal(Lucene.Net.Facet.Taxonomy.FacetLabel)">GetOrdinal(FacetLabel)</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 GetOrdinal(FacetLabel label)</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.Facet.Taxonomy.FacetLabel.html">FacetLabel</a></td> |
| <td><span class="parametername">label</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
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| <thead> |
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| <th>Type</th> |
| <th>Description</th> |
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| <tbody> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
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