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<h1 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector" class="text-break">Class FunctionAllGroupHeadsCollector
</h1>
<div class="markdown level0 summary"><p>An implementation of <a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector.html">AbstractAllGroupHeadsCollector</a> for retrieving the most relevant groups when grouping
by <span class="xref">Lucene.Net.Queries.Function.ValueSource</span>.</p>
<div class="lucene-block lucene-experimental">This is a Lucene.NET EXPERIMENTAL API, use at your own risk</div></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.Grouping.AbstractAllGroupHeadsCollector.html">AbstractAllGroupHeadsCollector</a></div>
<div class="level2"><a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html">AbstractAllGroupHeadsCollector</a>&lt;<a class="xref" href="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.GroupHead.html">FunctionAllGroupHeadsCollector.GroupHead</a>&gt;</div>
<div class="level3"><span class="xref">FunctionAllGroupHeadsCollector</span></div>
</div>
<div classs="implements">
<h5>Implements</h5>
<div><span class="xref">Lucene.Net.Search.ICollector</span></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_m_reversed">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.m_reversed</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_m_compIDXEnd">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.m_compIDXEnd</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_m_temporalResult">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.m_temporalResult</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_RetrieveGroupHeads_System_Int32_">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.RetrieveGroupHeads(Int32)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_RetrieveGroupHeads">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.RetrieveGroupHeads()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_GroupHeadsCount">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.GroupHeadsCount</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_Collect_System_Int32_">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.Collect(Int32)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector-1.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_1_AcceptsDocsOutOfOrder">AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;.AcceptsDocsOutOfOrder</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>
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<span class="xref">System.Object.GetHashCode()</span>
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<span class="xref">System.Object.GetType()</span>
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<span class="xref">System.Object.MemberwiseClone()</span>
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<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.Search.Grouping.Function.html">Lucene.Net.Search.Grouping.Function</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.Grouping.dll</h6>
<h5 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class FunctionAllGroupHeadsCollector : AbstractAllGroupHeadsCollector&lt;FunctionAllGroupHeadsCollector.GroupHead&gt;, ICollector</code></pre>
</div>
<h3 id="constructors">Constructors
</h3>
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</span>
<a id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector__ctor_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.#ctor*"></a>
<h4 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector__ctor_Lucene_Net_Queries_Function_ValueSource_System_Collections_IDictionary_Lucene_Net_Search_Sort_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.#ctor(Lucene.Net.Queries.Function.ValueSource,System.Collections.IDictionary,Lucene.Net.Search.Sort)">FunctionAllGroupHeadsCollector(ValueSource, IDictionary, Sort)</h4>
<div class="markdown level1 summary"><p>Constructs a <a class="xref" href="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.html">FunctionAllGroupHeadsCollector</a> instance.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public FunctionAllGroupHeadsCollector(ValueSource groupBy, IDictionary vsContext, Sort sortWithinGroup)</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.Queries.Function.ValueSource</span></td>
<td><span class="parametername">groupBy</span></td>
<td><p>The <span class="xref">Lucene.Net.Queries.Function.ValueSource</span> to group by</p>
</td>
</tr>
<tr>
<td><span class="xref">System.Collections.IDictionary</span></td>
<td><span class="parametername">vsContext</span></td>
<td><p>The <span class="xref">Lucene.Net.Queries.Function.ValueSource</span> context</p>
</td>
</tr>
<tr>
<td><span class="xref">Lucene.Net.Search.Sort</span></td>
<td><span class="parametername">sortWithinGroup</span></td>
<td><p>The sort within a group</p>
</td>
</tr>
</tbody>
</table>
<h3 id="properties">Properties
</h3>
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<span class="divider">|</span>
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</span>
<a id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_CollectedGroupHeads_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.CollectedGroupHeads*"></a>
<h4 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_CollectedGroupHeads" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.CollectedGroupHeads">CollectedGroupHeads</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">protected override ICollection&lt;FunctionAllGroupHeadsCollector.GroupHead&gt; CollectedGroupHeads { 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.Collections.Generic.ICollection</span>&lt;<a class="xref" href="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.GroupHead.html">FunctionAllGroupHeadsCollector.GroupHead</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><span class="xref">Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector&lt;Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.GroupHead&gt;.CollectedGroupHeads</span></div>
<h3 id="methods">Methods
</h3>
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<a id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_RetrieveGroupHeadAndAddIfNotExist_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.RetrieveGroupHeadAndAddIfNotExist*"></a>
<h4 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_RetrieveGroupHeadAndAddIfNotExist_System_Int32_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.RetrieveGroupHeadAndAddIfNotExist(System.Int32)">RetrieveGroupHeadAndAddIfNotExist(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">protected override void RetrieveGroupHeadAndAddIfNotExist(int doc)</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">doc</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><span class="xref">Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector&lt;Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.GroupHead&gt;.RetrieveGroupHeadAndAddIfNotExist(System.Int32)</span></div>
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<a id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_SetNextReader_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.SetNextReader*"></a>
<h4 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_SetNextReader_Lucene_Net_Index_AtomicReaderContext_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.SetNextReader(Lucene.Net.Index.AtomicReaderContext)">SetNextReader(AtomicReaderContext)</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 SetNextReader(AtomicReaderContext context)</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.AtomicReaderContext</span></td>
<td><span class="parametername">context</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_SetNextReader_Lucene_Net_Index_AtomicReaderContext_">AbstractAllGroupHeadsCollector.SetNextReader(AtomicReaderContext)</a></div>
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<a id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_SetScorer_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.SetScorer*"></a>
<h4 id="Lucene_Net_Search_Grouping_Function_FunctionAllGroupHeadsCollector_SetScorer_Lucene_Net_Search_Scorer_" data-uid="Lucene.Net.Search.Grouping.Function.FunctionAllGroupHeadsCollector.SetScorer(Lucene.Net.Search.Scorer)">SetScorer(Scorer)</h4>
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<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override void SetScorer(Scorer scorer)</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.Scorer</span></td>
<td><span class="parametername">scorer</span></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Search.Grouping.AbstractAllGroupHeadsCollector.html#Lucene_Net_Search_Grouping_AbstractAllGroupHeadsCollector_SetScorer_Lucene_Net_Search_Scorer_">AbstractAllGroupHeadsCollector.SetScorer(Scorer)</a></div>
<h3 id="implements">Implements</h3>
<div>
<span class="xref">Lucene.Net.Search.ICollector</span>
</div>
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