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<article class="content wrap" id="_content" data-uid="Lucene.Net.Documents.CompressionTools">
<h1 id="Lucene_Net_Documents_CompressionTools" data-uid="Lucene.Net.Documents.CompressionTools" class="text-break">Class CompressionTools
</h1>
<div class="markdown level0 summary"><p>Simple utility class providing static methods to
compress and decompress binary data for stored fields.
this class uses the <span class="xref">System.IO.Compression.DeflateStream</span>
class to compress and decompress.</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">CompressionTools</span></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.Documents.html">Lucene.Net.Documents</a></h6>
<h6><strong>Assembly</strong>: Lucene.Net.dll</h6>
<h5 id="Lucene_Net_Documents_CompressionTools_syntax">Syntax</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static class CompressionTools</code></pre>
</div>
<h3 id="methods">Methods
</h3>
<span class="small pull-right mobile-hide">
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<a id="Lucene_Net_Documents_CompressionTools_Compress_" data-uid="Lucene.Net.Documents.CompressionTools.Compress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Compress_System_Byte___" data-uid="Lucene.Net.Documents.CompressionTools.Compress(System.Byte[])">Compress(Byte[])</h4>
<div class="markdown level1 summary"><p>Compresses all <span class="xref">System.Byte</span>s in the array, with default <span class="xref">System.IO.Compression.CompressionLevel.Optimal</span> level </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Compress(byte[] value)</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.Byte</span>[]</td>
<td><span class="parametername">value</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_Compress_" data-uid="Lucene.Net.Documents.CompressionTools.Compress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Compress_System_Byte___System_Int32_System_Int32_" data-uid="Lucene.Net.Documents.CompressionTools.Compress(System.Byte[],System.Int32,System.Int32)">Compress(Byte[], Int32, Int32)</h4>
<div class="markdown level1 summary"><p>Compresses the specified <span class="xref">System.Byte</span> range, with default <span class="xref">System.IO.Compression.CompressionLevel.Optimal</span> level </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Compress(byte[] value, int offset, int length)</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.Byte</span>[]</td>
<td><span class="parametername">value</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">offset</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">length</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_Compress_" data-uid="Lucene.Net.Documents.CompressionTools.Compress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Compress_System_Byte___System_Int32_System_Int32_System_IO_Compression_CompressionLevel_" data-uid="Lucene.Net.Documents.CompressionTools.Compress(System.Byte[],System.Int32,System.Int32,System.IO.Compression.CompressionLevel)">Compress(Byte[], Int32, Int32, CompressionLevel)</h4>
<div class="markdown level1 summary"><p>Compresses the specified <span class="xref">System.Byte</span> range using the
specified <code data-dev-comment-type="paramref" class="paramref">compressionLevel</code>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Compress(byte[] value, int offset, int length, CompressionLevel compressionLevel)</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.Byte</span>[]</td>
<td><span class="parametername">value</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">offset</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">length</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.IO.Compression.CompressionLevel</span></td>
<td><span class="parametername">compressionLevel</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_CompressString_" data-uid="Lucene.Net.Documents.CompressionTools.CompressString*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_CompressString_System_String_" data-uid="Lucene.Net.Documents.CompressionTools.CompressString(System.String)">CompressString(String)</h4>
<div class="markdown level1 summary"><p>Compresses the <span class="xref">System.String</span> value, with default <span class="xref">System.IO.Compression.CompressionLevel.Optimal</span> level </p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] CompressString(string value)</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">value</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Documents_CompressionTools_CompressString_System_String_System_IO_Compression_CompressionLevel_" data-uid="Lucene.Net.Documents.CompressionTools.CompressString(System.String,System.IO.Compression.CompressionLevel)">CompressString(String, CompressionLevel)</h4>
<div class="markdown level1 summary"><p>Compresses the <span class="xref">System.String</span> value using the specified
<code data-dev-comment-type="paramref" class="paramref">compressionLevel</code>.</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] CompressString(string value, CompressionLevel compressionLevel)</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">value</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.IO.Compression.CompressionLevel</span></td>
<td><span class="parametername">compressionLevel</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_Decompress_" data-uid="Lucene.Net.Documents.CompressionTools.Decompress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Decompress_Lucene_Net_Util_BytesRef_" data-uid="Lucene.Net.Documents.CompressionTools.Decompress(Lucene.Net.Util.BytesRef)">Decompress(BytesRef)</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array previously returned by
compress (referenced by the provided <a class="xref" href="Lucene.Net.Util.BytesRef.html">BytesRef</a>)</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Decompress(BytesRef bytes)</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.BytesRef.html">BytesRef</a></td>
<td><span class="parametername">bytes</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_Decompress_" data-uid="Lucene.Net.Documents.CompressionTools.Decompress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Decompress_System_Byte___" data-uid="Lucene.Net.Documents.CompressionTools.Decompress(System.Byte[])">Decompress(Byte[])</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array previously returned by
compress</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Decompress(byte[] value)</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.Byte</span>[]</td>
<td><span class="parametername">value</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_Decompress_" data-uid="Lucene.Net.Documents.CompressionTools.Decompress*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_Decompress_System_Byte___System_Int32_System_Int32_" data-uid="Lucene.Net.Documents.CompressionTools.Decompress(System.Byte[],System.Int32,System.Int32)">Decompress(Byte[], Int32, Int32)</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array previously returned by
compress</p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static byte[] Decompress(byte[] value, int offset, int length)</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.Byte</span>[]</td>
<td><span class="parametername">value</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">offset</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">length</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.Byte</span>[]</td>
<td></td>
</tr>
</tbody>
</table>
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<a id="Lucene_Net_Documents_CompressionTools_DecompressString_" data-uid="Lucene.Net.Documents.CompressionTools.DecompressString*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_DecompressString_Lucene_Net_Util_BytesRef_" data-uid="Lucene.Net.Documents.CompressionTools.DecompressString(Lucene.Net.Util.BytesRef)">DecompressString(BytesRef)</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array (referenced by the provided <a class="xref" href="Lucene.Net.Util.BytesRef.html">BytesRef</a>)
previously returned by <a class="xref" href="Lucene.Net.Documents.CompressionTools.html#Lucene_Net_Documents_CompressionTools_CompressString_System_String_">CompressString(String)</a> back into a <span class="xref">System.String</span></p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static string DecompressString(BytesRef bytes)</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.BytesRef.html">BytesRef</a></td>
<td><span class="parametername">bytes</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.String</span></td>
<td></td>
</tr>
</tbody>
</table>
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<a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00013/websites/apidocs/apiSpec/new?filename=Lucene_Net_Documents_CompressionTools_DecompressString_System_Byte___.md&amp;value=---%0Auid%3A%20Lucene.Net.Documents.CompressionTools.DecompressString(System.Byte%5B%5D)%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 id="Lucene_Net_Documents_CompressionTools_DecompressString_" data-uid="Lucene.Net.Documents.CompressionTools.DecompressString*"></a>
<h4 id="Lucene_Net_Documents_CompressionTools_DecompressString_System_Byte___" data-uid="Lucene.Net.Documents.CompressionTools.DecompressString(System.Byte[])">DecompressString(Byte[])</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array previously returned by
<a class="xref" href="Lucene.Net.Documents.CompressionTools.html#Lucene_Net_Documents_CompressionTools_CompressString_System_String_">CompressString(String)</a> back into a <span class="xref">System.String</span></p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static string DecompressString(byte[] value)</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.Byte</span>[]</td>
<td><span class="parametername">value</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.String</span></td>
<td></td>
</tr>
</tbody>
</table>
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<h4 id="Lucene_Net_Documents_CompressionTools_DecompressString_System_Byte___System_Int32_System_Int32_" data-uid="Lucene.Net.Documents.CompressionTools.DecompressString(System.Byte[],System.Int32,System.Int32)">DecompressString(Byte[], Int32, Int32)</h4>
<div class="markdown level1 summary"><p>Decompress the <span class="xref">System.Byte</span> array previously returned by
<a class="xref" href="Lucene.Net.Documents.CompressionTools.html#Lucene_Net_Documents_CompressionTools_CompressString_System_String_">CompressString(String)</a> back into a <span class="xref">System.String</span></p>
</div>
<div class="markdown level1 conceptual"></div>
<h5 class="decalaration">Declaration</h5>
<div class="codewrapper">
<pre><code class="lang-csharp hljs">public static string DecompressString(byte[] value, int offset, int length)</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.Byte</span>[]</td>
<td><span class="parametername">value</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">offset</span></td>
<td></td>
</tr>
<tr>
<td><span class="xref">System.Int32</span></td>
<td><span class="parametername">length</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.String</span></td>
<td></td>
</tr>
</tbody>
</table>
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