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| |
| <h1 id="Lucene_Net_Analysis_En_PorterStemFilter" data-uid="Lucene.Net.Analysis.En.PorterStemFilter" class="text-break">Class PorterStemFilter |
| </h1> |
| <div class="markdown level0 summary"><p>Transforms the token stream as per the Porter stemming algorithm. |
| <p> |
| Note: the input to the stemming filter must already be in lower case, |
| so you will need to use LowerCaseFilter or LowerCaseTokenizer farther |
| down the Tokenizer chain in order for this to work properly! |
| <p> |
| To use this filter with other analyzers, you'll want to write an |
| Analyzer class that sets up the TokenStream chain as you want it. |
| To use this with LowerCaseTokenizer, for example, you'd write an |
| analyzer like this: |
| <p> |
| <pre><code>class MyAnalyzer : Analyzer { |
| protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader) { |
| Tokenizer source = new LowerCaseTokenizer(version, reader); |
| return new TokenStreamComponents(source, new PorterStemFilter(source)); |
| } |
| }</code></pre> |
| <p> |
| Note: This filter is aware of the <a class="xref" href="https://lucenenet.apache.org/docs/4.8.0-beta00013/api/core/Lucene.Net.Analysis.TokenAttributes.KeywordAttribute.html">KeywordAttribute</a>. To prevent |
| certain terms from being passed to the stemmer |
| <a class="xref" href="https://lucenenet.apache.org/docs/4.8.0-beta00013/api/core/Lucene.Net.Analysis.TokenAttributes.KeywordAttribute.html#Lucene_Net_Analysis_TokenAttributes_KeywordAttribute_IsKeyword">IsKeyword</a> should be set to <pre><code>true</code></pre> |
| in a previous <span class="xref">Lucene.Net.Analysis.TokenStream</span>. |
| |
| Note: For including the original term as well as the stemmed version, see |
| <a class="xref" href="Lucene.Net.Analysis.Miscellaneous.KeywordRepeatFilterFactory.html">KeywordRepeatFilterFactory</a> |
| </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">Lucene.Net.Util.AttributeSource</span></div> |
| <div class="level2"><span class="xref">Lucene.Net.Analysis.TokenStream</span></div> |
| <div class="level3"><span class="xref">Lucene.Net.Analysis.TokenFilter</span></div> |
| <div class="level4"><span class="xref">PorterStemFilter</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> |
| <span class="xref">Lucene.Net.Analysis.TokenFilter.m_input</span> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Analysis.TokenFilter.End()</span> |
| </div> |
| <div> |
| <a class="xref" href="https://lucenenet.apache.org/docs/4.8.0-beta00013/api/core/Lucene.Net.Analysis.TokenFilter.html#Lucene_Net_Analysis_TokenFilter_Dispose_System_Boolean_">TokenFilter.Dispose(Boolean)</a> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Analysis.TokenFilter.Reset()</span> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Analysis.TokenStream.Dispose()</span> |
| </div> |
| <div> |
| <span class="xref">Lucene.Net.Util.AttributeSource.GetAttributeFactory()</span> |
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| <span class="xref">Lucene.Net.Util.AttributeSource.GetAttributeClassesEnumerator()</span> |
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| <span class="xref">Lucene.Net.Util.AttributeSource.GetAttributeImplsEnumerator()</span> |
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| <div> |
| <span class="xref">Lucene.Net.Util.AttributeSource.AddAttributeImpl(Lucene.Net.Util.Attribute)</span> |
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| <span class="xref">Lucene.Net.Util.AttributeSource.ReflectWith(Lucene.Net.Util.IAttributeReflector)</span> |
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| <span class="xref">Lucene.Net.Util.AttributeSource.ToString()</span> |
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| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Analysis.En.html">Lucene.Net.Analysis.En</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Analysis.Common.dll</h6> |
| <h5 id="Lucene_Net_Analysis_En_PorterStemFilter_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public sealed class PorterStemFilter : TokenFilter, IDisposable</code></pre> |
| </div> |
| <h3 id="constructors">Constructors |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
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| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/fix/apidocs-layout/src/Lucene.Net.Analysis.Common/Analysis/En/PorterStemFilter.cs/#L58">View Source</a> |
| </span> |
| <a id="Lucene_Net_Analysis_En_PorterStemFilter__ctor_" data-uid="Lucene.Net.Analysis.En.PorterStemFilter.#ctor*"></a> |
| <h4 id="Lucene_Net_Analysis_En_PorterStemFilter__ctor_Lucene_Net_Analysis_TokenStream_" data-uid="Lucene.Net.Analysis.En.PorterStemFilter.#ctor(Lucene.Net.Analysis.TokenStream)">PorterStemFilter(TokenStream)</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 PorterStemFilter(TokenStream in)</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.Analysis.TokenStream</span></td> |
| <td><span class="parametername">in</span></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-beta00013/websites/apidocs/apiSpec/new?filename=Lucene_Net_Analysis_En_PorterStemFilter_IncrementToken.md&value=---%0Auid%3A%20Lucene.Net.Analysis.En.PorterStemFilter.IncrementToken%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 class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/fix/apidocs-layout/src/Lucene.Net.Analysis.Common/Analysis/En/PorterStemFilter.cs/#L64">View Source</a> |
| </span> |
| <a id="Lucene_Net_Analysis_En_PorterStemFilter_IncrementToken_" data-uid="Lucene.Net.Analysis.En.PorterStemFilter.IncrementToken*"></a> |
| <h4 id="Lucene_Net_Analysis_En_PorterStemFilter_IncrementToken" data-uid="Lucene.Net.Analysis.En.PorterStemFilter.IncrementToken">IncrementToken()</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 bool IncrementToken()</code></pre> |
| </div> |
| <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.Boolean</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="overrides">Overrides</h5> |
| <div><span class="xref">Lucene.Net.Analysis.TokenStream.IncrementToken()</span></div> |
| <h3 id="implements">Implements</h3> |
| <div> |
| <span class="xref">System.IDisposable</span> |
| </div> |
| </article> |
| </div> |
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