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| <h1 id="Lucene_Net_QueryParsers_Ext_ParserExtension" data-uid="Lucene.Net.QueryParsers.Ext.ParserExtension" class="text-break">Class ParserExtension |
| </h1> |
| <div class="markdown level0 summary"><p>This class represents an extension base class to the Lucene standard |
| <a class="xref" href="Lucene.Net.QueryParsers.Classic.QueryParser.html">QueryParser</a>. The |
| <a class="xref" href="Lucene.Net.QueryParsers.Classic.QueryParser.html">QueryParser</a> is generated by the JavaCC |
| parser generator. Changing or adding functionality or syntax in the standard |
| query parser requires changes to the JavaCC source file. To enable extending |
| the standard query parser without changing the JavaCC sources and re-generate |
| the parser the <a class="xref" href="Lucene.Net.QueryParsers.Ext.ParserExtension.html">ParserExtension</a> can be customized and plugged into an |
| instance of <a class="xref" href="Lucene.Net.QueryParsers.Ext.ExtendableQueryParser.html">ExtendableQueryParser</a>, a direct subclass of |
| <a class="xref" href="Lucene.Net.QueryParsers.Classic.QueryParser.html">QueryParser</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">ParserExtension</span></div> |
| </div> |
| <div class="inheritedMembers"> |
| <h5>Inherited Members</h5> |
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| <span class="xref">System.Object.Equals(System.Object)</span> |
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| <span class="xref">System.Object.ToString()</span> |
| </div> |
| </div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.QueryParsers.Ext.html">Lucene.Net.QueryParsers.Ext</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.QueryParser.dll</h6> |
| <h5 id="Lucene_Net_QueryParsers_Ext_ParserExtension_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public abstract class ParserExtension</code></pre> |
| </div> |
| <h3 id="methods">Methods |
| </h3> |
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| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00013/websites/apidocs/apiSpec/new?filename=Lucene_Net_QueryParsers_Ext_ParserExtension_Parse_Lucene_Net_QueryParsers_Ext_ExtensionQuery_.md&value=---%0Auid%3A%20Lucene.Net.QueryParsers.Ext.ParserExtension.Parse(Lucene.Net.QueryParsers.Ext.ExtensionQuery)%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 href="https://github.com/NightOwl888/lucenenet/blob/fix/apidocs-layout/src/Lucene.Net.QueryParser/Ext/ParserExtension.cs/#L47">View Source</a> |
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| <a id="Lucene_Net_QueryParsers_Ext_ParserExtension_Parse_" data-uid="Lucene.Net.QueryParsers.Ext.ParserExtension.Parse*"></a> |
| <h4 id="Lucene_Net_QueryParsers_Ext_ParserExtension_Parse_Lucene_Net_QueryParsers_Ext_ExtensionQuery_" data-uid="Lucene.Net.QueryParsers.Ext.ParserExtension.Parse(Lucene.Net.QueryParsers.Ext.ExtensionQuery)">Parse(ExtensionQuery)</h4> |
| <div class="markdown level1 summary"><p>Processes the given <a class="xref" href="Lucene.Net.QueryParsers.Ext.ExtensionQuery.html">ExtensionQuery</a> and returns a corresponding |
| <span class="xref">Lucene.Net.Search.Query</span> instance. Subclasses must either return a <span class="xref">Lucene.Net.Search.Query</span> |
| instance or raise a <a class="xref" href="Lucene.Net.QueryParsers.Classic.ParseException.html">ParseException</a>. This method must not return |
| <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 Query Parse(ExtensionQuery query)</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.QueryParsers.Ext.ExtensionQuery.html">ExtensionQuery</a></td> |
| <td><span class="parametername">query</span></td> |
| <td><p>the extension query</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">Lucene.Net.Search.Query</span></td> |
| <td><p>a new query instance</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><a class="xref" href="Lucene.Net.QueryParsers.Classic.ParseException.html">ParseException</a></td> |
| <td><p>if the query can not be parsed.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="seealso">See Also</h3> |
| <div class="seealso"> |
| <div><a class="xref" href="Lucene.Net.QueryParsers.Ext.Extensions.html">Extensions</a></div> |
| <div><a class="xref" href="Lucene.Net.QueryParsers.Ext.ExtendableQueryParser.html">ExtendableQueryParser</a></div> |
| </div> |
| </article> |
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