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<title>Class IndexReaderContext
| Apache Lucene.NET 4.8.0-beta00013 Documentation </title>
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| Apache Lucene.NET 4.8.0-beta00013 Documentation ">
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<h1 id="Lucene_Net_Index_IndexReaderContext" data-uid="Lucene.Net.Index.IndexReaderContext" class="text-break">Class IndexReaderContext
</h1>
<div class="markdown level0 summary"><p>A struct like class that represents a hierarchical relationship between
<a class="xref" href="Lucene.Net.Index.IndexReader.html">IndexReader</a> instances.</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">IndexReaderContext</span></div>
<div class="level2"><a class="xref" href="Lucene.Net.Index.AtomicReaderContext.html">AtomicReaderContext</a></div>
<div class="level2"><a class="xref" href="Lucene.Net.Index.CompositeReaderContext.html">CompositeReaderContext</a></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<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.Index.html">Lucene.Net.Index</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.dll</h6>
<h5 id="Lucene_Net_Index_IndexReaderContext_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract class IndexReaderContext</code></pre>
</div>
<h3 id="properties">Properties
</h3>
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<a id="Lucene_Net_Index_IndexReaderContext_Children_" data-uid="Lucene.Net.Index.IndexReaderContext.Children*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_Children" data-uid="Lucene.Net.Index.IndexReaderContext.Children">Children</h4>
<div class="markdown level1 summary"><p>Returns the context&apos;s children iff this context is a composite context
otherwise <code>null</code>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract IList&lt;IndexReaderContext&gt; Children { 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.IList</span>&lt;<a class="xref" href="Lucene.Net.Index.IndexReaderContext.html">IndexReaderContext</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_IndexReaderContext_DocBaseInParent_" data-uid="Lucene.Net.Index.IndexReaderContext.DocBaseInParent*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_DocBaseInParent" data-uid="Lucene.Net.Index.IndexReaderContext.DocBaseInParent">DocBaseInParent</h4>
<div class="markdown level1 summary"><p>the doc base for this reader in the parent, <code>0</code> if parent is <code>null</code> </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public int DocBaseInParent { 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>
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<a id="Lucene_Net_Index_IndexReaderContext_IsTopLevel_" data-uid="Lucene.Net.Index.IndexReaderContext.IsTopLevel*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_IsTopLevel" data-uid="Lucene.Net.Index.IndexReaderContext.IsTopLevel">IsTopLevel</h4>
<div class="markdown level1 summary"><p><code>true</code> if this context struct represents the top level reader within the hierarchical context </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public bool IsTopLevel { 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.Boolean</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Index_IndexReaderContext_Leaves_" data-uid="Lucene.Net.Index.IndexReaderContext.Leaves*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_Leaves" data-uid="Lucene.Net.Index.IndexReaderContext.Leaves">Leaves</h4>
<div class="markdown level1 summary"><p>Returns the context&apos;s leaves if this context is a top-level context.
For convenience, if this is an <a class="xref" href="Lucene.Net.Index.AtomicReaderContext.html">AtomicReaderContext</a> this
returns itself as the only leaf.
<p>Note: this is convenience method since leaves can always be obtained by
walking the context tree using <a class="xref" href="Lucene.Net.Index.IndexReaderContext.html#Lucene_Net_Index_IndexReaderContext_Children">Children</a>. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract IList&lt;AtomicReaderContext&gt; Leaves { 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.IList</span>&lt;<a class="xref" href="Lucene.Net.Index.AtomicReaderContext.html">AtomicReaderContext</a>&gt;</td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="exceptions">Exceptions</h5>
<table class="table table-bordered table-striped table-condensed">
<thead>
<tr>
<th>Type</th>
<th>Condition</th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="xref">System.InvalidOperationException</span></td>
<td><p>if this is not a top-level context. </p>
</td>
</tr>
</tbody>
</table>
<h5 id="Lucene_Net_Index_IndexReaderContext_Leaves_seealso">See Also</h5>
<div class="seealso">
<div><a class="xref" href="Lucene.Net.Index.IndexReaderContext.html#Lucene_Net_Index_IndexReaderContext_Children">Children</a></div>
</div>
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<a id="Lucene_Net_Index_IndexReaderContext_OrdInParent_" data-uid="Lucene.Net.Index.IndexReaderContext.OrdInParent*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_OrdInParent" data-uid="Lucene.Net.Index.IndexReaderContext.OrdInParent">OrdInParent</h4>
<div class="markdown level1 summary"><p>the ord for this reader in the parent, <code>0</code> if parent is <code>null</code> </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public int OrdInParent { 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>
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<a id="Lucene_Net_Index_IndexReaderContext_Parent_" data-uid="Lucene.Net.Index.IndexReaderContext.Parent*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_Parent" data-uid="Lucene.Net.Index.IndexReaderContext.Parent">Parent</h4>
<div class="markdown level1 summary"><p>The reader context for this reader&apos;s immediate parent, or null if none </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public CompositeReaderContext Parent { 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><a class="xref" href="Lucene.Net.Index.CompositeReaderContext.html">CompositeReaderContext</a></td>
<td></td>
</tr>
</tbody>
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<a id="Lucene_Net_Index_IndexReaderContext_Reader_" data-uid="Lucene.Net.Index.IndexReaderContext.Reader*"></a>
<h4 id="Lucene_Net_Index_IndexReaderContext_Reader" data-uid="Lucene.Net.Index.IndexReaderContext.Reader">Reader</h4>
<div class="markdown level1 summary"><p>Returns the <a class="xref" href="Lucene.Net.Index.IndexReader.html">IndexReader</a>, this context represents. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public abstract IndexReader Reader { 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><a class="xref" href="Lucene.Net.Index.IndexReader.html">IndexReader</a></td>
<td></td>
</tr>
</tbody>
</table>
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