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| Apache Lucene.NET 4.8.0-beta00013 Documentation </title>
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<article class="content wrap" id="_content" data-uid="Lucene.Net.Store.NIOFSDirectory">
<h1 id="Lucene_Net_Store_NIOFSDirectory" data-uid="Lucene.Net.Store.NIOFSDirectory" class="text-break">Class NIOFSDirectory
</h1>
<div class="markdown level0 summary"><p>An <a class="xref" href="Lucene.Net.Store.FSDirectory.html">FSDirectory</a> implementation that uses <span class="xref">System.IO.FileStream</span>&apos;s
positional read, which allows multiple threads to read from the same file
without synchronizing.
<p>
This class only uses <span class="xref">System.IO.FileStream</span> when reading; writing is achieved with
<a class="xref" href="Lucene.Net.Store.FSDirectory.FSIndexOutput.html">FSDirectory.FSIndexOutput</a>.
<p>
<strong>NOTE</strong>: <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> is not recommended on Windows because of a bug in
how FileChannel.read is implemented in Sun&apos;s JRE. Inside of the
implementation the position is apparently synchronized. See <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6265734">here</a>
for details.
</p>
<p>
<font color="red"><strong>NOTE:</strong> Accessing this class either directly or
indirectly from a thread while it&apos;s interrupted can close the
underlying file descriptor immediately if at the same time the thread is
blocked on IO. The file descriptor will remain closed and subsequent access
to <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> will throw a <span class="xref">System.ObjectDisposedException</span>. If
your application uses either <span class="xref">System.Threading.Thread.Interrupt</span> or
<span class="xref">System.Threading.Tasks.Task</span> you should use <a class="xref" href="Lucene.Net.Store.SimpleFSDirectory.html">SimpleFSDirectory</a> in
favor of <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a>.</font>
</p></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.Store.Directory.html">Directory</a></div>
<div class="level2"><a class="xref" href="Lucene.Net.Store.BaseDirectory.html">BaseDirectory</a></div>
<div class="level3"><a class="xref" href="Lucene.Net.Store.FSDirectory.html">FSDirectory</a></div>
<div class="level4"><span class="xref">NIOFSDirectory</span></div>
</div>
<div classs="implements">
<h5>Implements</h5>
<div><span class="xref">System.IDisposable</span></div>
</div>
<div class="inheritedMembers">
<h5>Inherited Members</h5>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_DEFAULT_READ_CHUNK_SIZE">FSDirectory.DEFAULT_READ_CHUNK_SIZE</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_m_directory">FSDirectory.m_directory</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Open_System_IO_DirectoryInfo_">FSDirectory.Open(DirectoryInfo)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Open_System_String_">FSDirectory.Open(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Open_System_IO_DirectoryInfo_Lucene_Net_Store_LockFactory_">FSDirectory.Open(DirectoryInfo, LockFactory)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Open_System_String_Lucene_Net_Store_LockFactory_">FSDirectory.Open(String, LockFactory)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_SetLockFactory_Lucene_Net_Store_LockFactory_">FSDirectory.SetLockFactory(LockFactory)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_ListAll_System_IO_DirectoryInfo_">FSDirectory.ListAll(DirectoryInfo)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_ListAll">FSDirectory.ListAll()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_FileExists_System_String_">FSDirectory.FileExists(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_FileLength_System_String_">FSDirectory.FileLength(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_DeleteFile_System_String_">FSDirectory.DeleteFile(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_CreateOutput_System_String_Lucene_Net_Store_IOContext_">FSDirectory.CreateOutput(String, IOContext)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_EnsureCanWrite_System_String_">FSDirectory.EnsureCanWrite(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_OnIndexOutputClosed_Lucene_Net_Store_FSDirectory_FSIndexOutput_">FSDirectory.OnIndexOutputClosed(FSDirectory.FSIndexOutput)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Sync_System_Collections_Generic_ICollection_System_String__">FSDirectory.Sync(ICollection&lt;String&gt;)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_GetLockID">FSDirectory.GetLockID()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Dispose_System_Boolean_">FSDirectory.Dispose(Boolean)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_Directory">FSDirectory.Directory</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_ToString">FSDirectory.ToString()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.FSDirectory.html#Lucene_Net_Store_FSDirectory_ReadChunkSize">FSDirectory.ReadChunkSize</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_IsOpen">BaseDirectory.IsOpen</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_m_lockFactory">BaseDirectory.m_lockFactory</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_MakeLock_System_String_">BaseDirectory.MakeLock(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_ClearLock_System_String_">BaseDirectory.ClearLock(String)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_LockFactory">BaseDirectory.LockFactory</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.BaseDirectory.html#Lucene_Net_Store_BaseDirectory_EnsureOpen">BaseDirectory.EnsureOpen()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.Directory.html#Lucene_Net_Store_Directory_OpenChecksumInput_System_String_Lucene_Net_Store_IOContext_">Directory.OpenChecksumInput(String, IOContext)</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.Directory.html#Lucene_Net_Store_Directory_Dispose">Directory.Dispose()</a>
</div>
<div>
<a class="xref" href="Lucene.Net.Store.Directory.html#Lucene_Net_Store_Directory_Copy_Lucene_Net_Store_Directory_System_String_System_String_Lucene_Net_Store_IOContext_">Directory.Copy(Directory, String, String, IOContext)</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>
<h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Store.html">Lucene.Net.Store</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.dll</h6>
<h5 id="Lucene_Net_Store_NIOFSDirectory_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public class NIOFSDirectory : FSDirectory, IDisposable</code></pre>
</div>
<h3 id="constructors">Constructors
</h3>
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<a id="Lucene_Net_Store_NIOFSDirectory__ctor_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor*"></a>
<h4 id="Lucene_Net_Store_NIOFSDirectory__ctor_System_IO_DirectoryInfo_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor(System.IO.DirectoryInfo)">NIOFSDirectory(DirectoryInfo)</h4>
<div class="markdown level1 summary"><p>Create a new <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> for the named location and <a class="xref" href="Lucene.Net.Store.NativeFSLockFactory.html">NativeFSLockFactory</a>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public NIOFSDirectory(DirectoryInfo path)</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.IO.DirectoryInfo</span></td>
<td><span class="parametername">path</span></td>
<td><p>the path of the directory </p>
</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.IO.IOException</span></td>
<td><p>if there is a low-level I/O error </p>
</td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Store_NIOFSDirectory__ctor_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor*"></a>
<h4 id="Lucene_Net_Store_NIOFSDirectory__ctor_System_IO_DirectoryInfo_Lucene_Net_Store_LockFactory_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor(System.IO.DirectoryInfo,Lucene.Net.Store.LockFactory)">NIOFSDirectory(DirectoryInfo, LockFactory)</h4>
<div class="markdown level1 summary"><p>Create a new <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> for the named location.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public NIOFSDirectory(DirectoryInfo path, LockFactory lockFactory)</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.IO.DirectoryInfo</span></td>
<td><span class="parametername">path</span></td>
<td><p>the path of the directory </p>
</td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Store.LockFactory.html">LockFactory</a></td>
<td><span class="parametername">lockFactory</span></td>
<td><p>the lock factory to use, or null for the default
(<a class="xref" href="Lucene.Net.Store.NativeFSLockFactory.html">NativeFSLockFactory</a>); </p>
</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.IO.IOException</span></td>
<td><p>if there is a low-level I/O error </p>
</td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Store_NIOFSDirectory__ctor_System_String_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor(System.String)">NIOFSDirectory(String)</h4>
<div class="markdown level1 summary"><p>Create a new <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> for the named location and <a class="xref" href="Lucene.Net.Store.NativeFSLockFactory.html">NativeFSLockFactory</a>.
<p>
LUCENENET specific overload for convenience using string instead of <span class="xref">System.IO.DirectoryInfo</span>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public NIOFSDirectory(string path)</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">path</span></td>
<td><p>the path of the directory </p>
</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.IO.IOException</span></td>
<td><p>if there is a low-level I/O error </p>
</td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Store_NIOFSDirectory__ctor_System_String_Lucene_Net_Store_LockFactory_" data-uid="Lucene.Net.Store.NIOFSDirectory.#ctor(System.String,Lucene.Net.Store.LockFactory)">NIOFSDirectory(String, LockFactory)</h4>
<div class="markdown level1 summary"><p>Create a new <a class="xref" href="Lucene.Net.Store.NIOFSDirectory.html">NIOFSDirectory</a> for the named location.
<p>
LUCENENET specific overload for convenience using string instead of <span class="xref">System.IO.DirectoryInfo</span>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public NIOFSDirectory(string path, LockFactory lockFactory)</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">path</span></td>
<td><p>the path of the directory </p>
</td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Store.LockFactory.html">LockFactory</a></td>
<td><span class="parametername">lockFactory</span></td>
<td><p>the lock factory to use, or null for the default
(<a class="xref" href="Lucene.Net.Store.NativeFSLockFactory.html">NativeFSLockFactory</a>); </p>
</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.IO.IOException</span></td>
<td><p>if there is a low-level I/O error </p>
</td>
</tr>
</tbody>
</table>
<h3 id="methods">Methods
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<a id="Lucene_Net_Store_NIOFSDirectory_CreateSlicer_" data-uid="Lucene.Net.Store.NIOFSDirectory.CreateSlicer*"></a>
<h4 id="Lucene_Net_Store_NIOFSDirectory_CreateSlicer_System_String_Lucene_Net_Store_IOContext_" data-uid="Lucene.Net.Store.NIOFSDirectory.CreateSlicer(System.String,Lucene.Net.Store.IOContext)">CreateSlicer(String, IOContext)</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 Directory.IndexInputSlicer CreateSlicer(string name, IOContext 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">System.String</span></td>
<td><span class="parametername">name</span></td>
<td></td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Store.IOContext.html">IOContext</a></td>
<td><span class="parametername">context</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.Store.Directory.IndexInputSlicer.html">Directory.IndexInputSlicer</a></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Store.Directory.html#Lucene_Net_Store_Directory_CreateSlicer_System_String_Lucene_Net_Store_IOContext_">Directory.CreateSlicer(String, IOContext)</a></div>
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<a id="Lucene_Net_Store_NIOFSDirectory_OpenInput_" data-uid="Lucene.Net.Store.NIOFSDirectory.OpenInput*"></a>
<h4 id="Lucene_Net_Store_NIOFSDirectory_OpenInput_System_String_Lucene_Net_Store_IOContext_" data-uid="Lucene.Net.Store.NIOFSDirectory.OpenInput(System.String,Lucene.Net.Store.IOContext)">OpenInput(String, IOContext)</h4>
<div class="markdown level1 summary"><p>Creates an <a class="xref" href="Lucene.Net.Store.IndexInput.html">IndexInput</a> for the file with the given name. </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public override IndexInput OpenInput(string name, IOContext 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">System.String</span></td>
<td><span class="parametername">name</span></td>
<td></td>
</tr>
<tr>
<td><a class="xref" href="Lucene.Net.Store.IOContext.html">IOContext</a></td>
<td><span class="parametername">context</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.Store.IndexInput.html">IndexInput</a></td>
<td></td>
</tr>
</tbody>
</table>
<h5 class="overrides">Overrides</h5>
<div><a class="xref" href="Lucene.Net.Store.Directory.html#Lucene_Net_Store_Directory_OpenInput_System_String_Lucene_Net_Store_IOContext_">Directory.OpenInput(String, IOContext)</a></div>
<h3 id="implements">Implements</h3>
<div>
<span class="xref">System.IDisposable</span>
</div>
</article>
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