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| |
| <h1 id="Lucene_Net_Codecs_Bloom_MurmurHash2" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2" class="text-break">Class MurmurHash2 |
| </h1> |
| <div class="markdown level0 summary"><p>This is a very fast, non-cryptographic hash suitable for general hash-based |
| lookup. See <a href="http://murmurhash.googlepages.com/">http://murmurhash.googlepages.com/</a> for more details. |
| <p> |
| The C version of MurmurHash 2.0 found at that site was ported to Java by |
| Andrzej Bialecki (ab at getopt org). |
| <p> |
| The code from getopt.org was adapted by Mark Harwood in the form here as one of a pluggable choice of |
| hashing functions as the core function had to be adapted to work with <span class="xref">Lucene.Net.Util.BytesRef</span>s with offsets and lengths |
| rather than raw byte arrays.<br><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.Codecs.Bloom.HashFunction.html">HashFunction</a></div> |
| <div class="level2"><span class="xref">MurmurHash2</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.Codecs.Bloom.html">Lucene.Net.Codecs.Bloom</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Codecs.dll</h6> |
| <h5 id="Lucene_Net_Codecs_Bloom_MurmurHash2_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public sealed class MurmurHash2 : HashFunction</code></pre> |
| </div> |
| <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_Codecs_Bloom_MurmurHash2_INSTANCE.md&value=---%0Auid%3A%20Lucene.Net.Codecs.Bloom.MurmurHash2.INSTANCE%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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| </span> |
| <h4 id="Lucene_Net_Codecs_Bloom_MurmurHash2_INSTANCE" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.INSTANCE">INSTANCE</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 static readonly MurmurHash2 INSTANCE</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><a class="xref" href="Lucene.Net.Codecs.Bloom.MurmurHash2.html">MurmurHash2</a></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_Codecs_Bloom_MurmurHash2_Hash_Lucene_Net_Util_BytesRef_.md&value=---%0Auid%3A%20Lucene.Net.Codecs.Bloom.MurmurHash2.Hash(Lucene.Net.Util.BytesRef)%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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| </span> |
| <a id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash*"></a> |
| <h4 id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash_Lucene_Net_Util_BytesRef_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash(Lucene.Net.Util.BytesRef)">Hash(BytesRef)</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 Hash(BytesRef br)</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.Util.BytesRef</span></td> |
| <td><span class="parametername">br</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.Int32</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><a class="xref" href="Lucene.Net.Codecs.Bloom.HashFunction.html#Lucene_Net_Codecs_Bloom_HashFunction_Hash_Lucene_Net_Util_BytesRef_">HashFunction.Hash(BytesRef)</a></div> |
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| </span> |
| <a id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash*"></a> |
| <h4 id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash_System_Byte___System_Int32_System_Int32_System_Int32_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash(System.Byte[],System.Int32,System.Int32,System.Int32)">Hash(Byte[], Int32, Int32, 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 static int Hash(byte[] data, int seed, int offset, int len)</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">data</span></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">seed</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">len</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.Int32</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
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| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00010/websites/apidocs/apiSpec/new?filename=Lucene_Net_Codecs_Bloom_MurmurHash2_Hash32_System_Byte___System_Int32_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Codecs.Bloom.MurmurHash2.Hash32(System.Byte%5B%5D%2CSystem.Int32%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> |
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| </span> |
| <a id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash32_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash32*"></a> |
| <h4 id="Lucene_Net_Codecs_Bloom_MurmurHash2_Hash32_System_Byte___System_Int32_System_Int32_" data-uid="Lucene.Net.Codecs.Bloom.MurmurHash2.Hash32(System.Byte[],System.Int32,System.Int32)">Hash32(Byte[], Int32, Int32)</h4> |
| <div class="markdown level1 summary"><p>Generates 32 bit hash from byte array with default seed value.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public static int Hash32(byte[] data, int offset, int len)</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">data</span></td> |
| <td><p>Byte array to hash.</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">offset</span></td> |
| <td><p>The start position in the array to hash.</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">len</span></td> |
| <td><p>Length of the array elements to hash.</p> |
| </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.Int32</span></td> |
| <td><p>32 bit hash of the given array.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </article> |
| </div> |
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