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| |
| <h1 id="Lucene_Net_Index_Memory_MemoryIndex" data-uid="Lucene.Net.Index.Memory.MemoryIndex" class="text-break">Class MemoryIndex |
| </h1> |
| <div class="markdown level0 summary"><p>High-performance single-document main memory Apache Lucene fulltext search index. </p> |
| <h4>Overview</h4> |
| |
| <p>This class is a replacement/substitute for a large subset of |
| <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Store.RAMDirectory.html">RAMDirectory</a> functionality. It is designed to |
| enable maximum efficiency for on-the-fly matchmaking combining structured and |
| fuzzy fulltext search in realtime streaming applications such as Nux XQuery based XML |
| message queues, publish-subscribe systems for Blogs/newsfeeds, text chat, data acquisition and |
| distribution systems, application level routers, firewalls, classifiers, etc. |
| Rather than targeting fulltext search of infrequent queries over huge persistent |
| data archives (historic search), this class targets fulltext search of huge |
| numbers of queries over comparatively small transient realtime data (prospective |
| search). |
| For example as in </p> |
| <pre><code>float score = Search(string text, Query query)</code></pre> |
| <p> |
| Each instance can hold at most one Lucene "document", with a document containing |
| zero or more "fields", each field having a name and a fulltext value. The |
| fulltext value is tokenized (split and transformed) into zero or more index terms |
| (aka words) on <pre><code>AddField()</code></pre>, according to the policy implemented by an |
| Analyzer. For example, Lucene analyzers can split on whitespace, normalize to lower case |
| for case insensitivity, ignore common terms with little discriminatory value such as "he", "in", "and" (stop |
| words), reduce the terms to their natural linguistic root form such as "fishing" |
| being reduced to "fish" (stemming), resolve synonyms/inflexions/thesauri |
| (upon indexing and/or querying), etc. For details, see |
| <a target="_blank" href="http://today.java.net/pub/a/today/2003/07/30/LuceneIntro.html">Lucene Analyzer Intro</a>. |
| </p> |
| <p> |
| Arbitrary Lucene queries can be run against this class - see <a target="_blank" href="{@docRoot}/../queryparser/org/apache/lucene/queryparser/classic/package-summary.html#package_description"> |
| Lucene Query Syntax</a> |
| as well as <a target="_blank" href="http://today.java.net/pub/a/today/2003/11/07/QueryParserRules.html">Query Parser Rules</a>. |
| Note that a Lucene query selects on the field names and associated (indexed) |
| tokenized terms, not on the original fulltext(s) - the latter are not stored |
| but rather thrown away immediately after tokenization. |
| </p> |
| <p> |
| For some interesting background information on search technology, see Bob Wyman's |
| <a target="_blank" href="http://bobwyman.pubsub.com/main/2005/05/mary_hodder_poi.html">Prospective Search</a>, |
| Jim Gray's |
| <a target="_blank" href="http://www.acmqueue.org/modules.php?name=Content&pa=showpage&pid=293&page=4"> |
| A Call to Arms - Custom subscriptions</a>, and Tim Bray's |
| <a target="_blank" href="http://www.tbray.org/ongoing/When/200x/2003/07/30/OnSearchTOC">On Search, the Series</a>. |
| |
| |
| <h4>Example Usage</h4> |
| |
| <pre><code>Analyzer analyzer = new SimpleAnalyzer(version); |
| MemoryIndex index = new MemoryIndex(); |
| index.AddField("content", "Readings about Salmons and other select Alaska fishing Manuals", analyzer); |
| index.AddField("author", "Tales of James", analyzer); |
| QueryParser parser = new QueryParser(version, "content", analyzer); |
| float score = index.Search(parser.Parse("+author:james +salmon~ +fish* manual~")); |
| if (score > 0.0f) { |
| Console.WriteLine("it's a match"); |
| } else { |
| Console.WriteLine("no match found"); |
| } |
| Console.WriteLine("indexData=" + index.toString());</code></pre> |
| |
| |
| <h4>Example XQuery Usage</h4> |
| |
| <pre><code>(: An XQuery that finds all books authored by James that have something to do with "salmon fishing manuals", sorted by relevance :) |
| declare namespace lucene = "java:nux.xom.pool.FullTextUtil"; |
| declare variable $query := "+salmon~ +fish* manual~"; (: any arbitrary Lucene query can go here :) |
| |
| for $book in /books/book[author="James" and lucene:match(abstract, $query) > 0.0] |
| let $score := lucene:match($book/abstract, $query) |
| order by $score descending |
| return $book</code></pre> |
| |
| |
| <h4>No thread safety guarantees</h4> |
| |
| An instance can be queried multiple times with the same or different queries, |
| but an instance is not thread-safe. If desired use idioms such as: |
| <pre><code>MemoryIndex index = ... |
| lock (index) { |
| // read and/or write index (i.e. add fields and/or query) |
| } </code></pre> |
| |
| |
| <h4>Performance Notes</h4> |
| |
| Internally there's a new data structure geared towards efficient indexing |
| and searching, plus the necessary support code to seamlessly plug into the Lucene |
| framework. |
| </p> |
| <p> |
| This class performs very well for very small texts (e.g. 10 chars) |
| as well as for large texts (e.g. 10 MB) and everything in between. |
| Typically, it is about 10-100 times faster than <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Store.RAMDirectory.html">RAMDirectory</a>. |
| Note that <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Store.RAMDirectory.html">RAMDirectory</a> has particularly |
| large efficiency overheads for small to medium sized texts, both in time and space. |
| Indexing a field with N tokens takes O(N) in the best case, and O(N logN) in the worst |
| case. Memory consumption is probably larger than for <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Store.RAMDirectory.html">RAMDirectory</a>. |
| </p> |
| <p> |
| Example throughput of many simple term queries over a single MemoryIndex: |
| ~500000 queries/sec on a MacBook Pro, jdk 1.5.0_06, server VM. |
| As always, your mileage may vary. |
| </p> |
| <p> |
| If you're curious about |
| the whereabouts of bottlenecks, run java 1.5 with the non-perturbing '-server |
| -agentlib:hprof=cpu=samples,depth=10' flags, then study the trace log and |
| correlate its hotspot trailer with its call stack headers (see <a target="_blank" href="http://java.sun.com/developer/technicalArticles/Programming/HPROF.html"> |
| hprof tracing </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">MemoryIndex</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> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Lucene.Net.Index.Memory.html">Lucene.Net.Index.Memory</a></h6> |
| <h6><strong>Assembly</strong>: Lucene.Net.Memory.dll</h6> |
| <h5 id="Lucene_Net_Index_Memory_MemoryIndex_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">[Serializable] |
| public class MemoryIndex</code></pre> |
| </div> |
| <h3 id="constructors">Constructors |
| </h3> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex__ctor.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.%23ctor%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L188">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex__ctor_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.#ctor*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex__ctor" data-uid="Lucene.Net.Index.Memory.MemoryIndex.#ctor">MemoryIndex()</h4> |
| <div class="markdown level1 summary"><p>Constructs an empty instance.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public MemoryIndex()</code></pre> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex__ctor_System_Boolean_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.%23ctor(System.Boolean)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L203">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex__ctor_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.#ctor*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex__ctor_System_Boolean_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.#ctor(System.Boolean)">MemoryIndex(Boolean)</h4> |
| <div class="markdown level1 summary"><p>Constructs an empty instance that can optionally store the start and end |
| character offset of each token term in the text. This can be useful for |
| highlighting of hit locations with the Lucene highlighter package. |
| Protected until the highlighter package matures, so that this can actually |
| be meaningfully integrated.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public MemoryIndex(bool storeOffsets)</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.Boolean</span></td> |
| <td><span class="parametername">storeOffsets</span></td> |
| <td><p>whether or not to store the start and end character offset of |
| each token term in the text </p> |
| </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-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String%2CLucene.Net.Analysis.TokenStream)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L330">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_AddField_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String,Lucene.Net.Analysis.TokenStream)">AddField(String, TokenStream)</h4> |
| <div class="markdown level1 summary"><p>Equivalent to <code>AddField(fieldName, stream, 1.0f)</code>.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void AddField(string fieldName, TokenStream stream)</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">fieldName</span></td> |
| <td><p>a name to be associated with the text </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.TokenStream</span></td> |
| <td><span class="parametername">stream</span></td> |
| <td><p>the token stream to retrieve tokens from </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String%2CLucene.Net.Analysis.TokenStream%2CSystem.Single)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L346">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_AddField_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String,Lucene.Net.Analysis.TokenStream,System.Single)">AddField(String, TokenStream, Single)</h4> |
| <div class="markdown level1 summary"><p>Iterates over the given token stream and adds the resulting terms to the index; |
| Equivalent to adding a tokenized, indexed, termVectorStored, unstored, |
| Lucene <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html">Field</a>. |
| Finally closes the token stream. Note that untokenized keywords can be added with this method via |
| <span class="xref">KeywordTokenStream{T}(ICollection{T}</span>)"/>, the Lucene <code>KeywordTokenizer</code> or similar utilities.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void AddField(string fieldName, TokenStream stream, float boost)</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">fieldName</span></td> |
| <td><p>a name to be associated with the text </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.TokenStream</span></td> |
| <td><span class="parametername">stream</span></td> |
| <td><p>the token stream to retrieve tokens from. </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">boost</span></td> |
| <td><p>the boost factor for hits for this field </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single__seealso">See Also</h5> |
| <div class="seealso"> |
| <div><a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html#Lucene_Net_Documents_Field_Boost">Boost</a></div> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
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| </span> |
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| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L366">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_AddField_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_System_Int32_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String,Lucene.Net.Analysis.TokenStream,System.Single,System.Int32)">AddField(String, TokenStream, Single, Int32)</h4> |
| <div class="markdown level1 summary"><p>Iterates over the given token stream and adds the resulting terms to the index; |
| Equivalent to adding a tokenized, indexed, termVectorStored, unstored, |
| Lucene <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html">Field</a>. |
| Finally closes the token stream. Note that untokenized keywords can be added with this method via |
| <span class="xref">KeywordTokenStream{T}(ICollection{T}</span>)"/>, the Lucene <code>KeywordTokenizer</code> or similar utilities.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void AddField(string fieldName, TokenStream stream, float boost, int positionIncrementGap)</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">fieldName</span></td> |
| <td><p>a name to be associated with the text </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.TokenStream</span></td> |
| <td><span class="parametername">stream</span></td> |
| <td><p>the token stream to retrieve tokens from. </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">boost</span></td> |
| <td><p>the boost factor for hits for this field </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">positionIncrementGap</span></td> |
| <td><p>the position increment gap if fields with the same name are added more than once</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_System_Int32__seealso">See Also</h5> |
| <div class="seealso"> |
| <div><a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html#Lucene_Net_Documents_Field_Boost">Boost</a></div> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_System_Int32_System_Int32_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String%2CLucene.Net.Analysis.TokenStream%2CSystem.Single%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L385">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_AddField_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_System_Int32_System_Int32_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String,Lucene.Net.Analysis.TokenStream,System.Single,System.Int32,System.Int32)">AddField(String, TokenStream, Single, Int32, Int32)</h4> |
| <div class="markdown level1 summary"><p>Iterates over the given token stream and adds the resulting terms to the index; |
| Equivalent to adding a tokenized, indexed, termVectorStored, unstored, |
| Lucene <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html">Field</a>. |
| Finally closes the token stream. Note that untokenized keywords can be added with this method via |
| <span class="xref">KeywordTokenStream{T}(ICollection{T}</span>)"/>, the Lucene <code>KeywordTokenizer</code> or similar utilities.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void AddField(string fieldName, TokenStream stream, float boost, int positionIncrementGap, int offsetGap)</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">fieldName</span></td> |
| <td><p>a name to be associated with the text </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.TokenStream</span></td> |
| <td><span class="parametername">stream</span></td> |
| <td><p>the token stream to retrieve tokens from. </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Single</span></td> |
| <td><span class="parametername">boost</span></td> |
| <td><p>the boost factor for hits for this field </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">positionIncrementGap</span></td> |
| <td><p>the position increment gap if fields with the same name are added more than once </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Int32</span></td> |
| <td><span class="parametername">offsetGap</span></td> |
| <td><p>the offset gap if fields with the same name are added more than once </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_System_Single_System_Int32_System_Int32__seealso">See Also</h5> |
| <div class="seealso"> |
| <div><a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html#Lucene_Net_Documents_Field_Boost">Boost</a></div> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_System_String_Lucene_Net_Analysis_Analyzer_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String%2CSystem.String%2CLucene.Net.Analysis.Analyzer)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L234">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_AddField_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_System_String_Lucene_Net_Analysis_Analyzer_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.AddField(System.String,System.String,Lucene.Net.Analysis.Analyzer)">AddField(String, String, Analyzer)</h4> |
| <div class="markdown level1 summary"><p>Convenience method; Tokenizes the given field text and adds the resulting |
| terms to the index; Equivalent to adding an indexed non-keyword Lucene |
| <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Documents.Field.html">Field</a> that is tokenized, not stored, |
| termVectorStored with positions (or termVectorStored with positions and offsets),</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void AddField(string fieldName, string text, Analyzer analyzer)</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">fieldName</span></td> |
| <td><p>a name to be associated with the text </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.String</span></td> |
| <td><span class="parametername">text</span></td> |
| <td><p>the text to tokenize and index. </p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">Lucene.Net.Analysis.Analyzer</span></td> |
| <td><span class="parametername">analyzer</span></td> |
| <td><p>the analyzer to use for tokenization </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_CreateSearcher.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.CreateSearcher%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L514">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_CreateSearcher_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.CreateSearcher*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_CreateSearcher" data-uid="Lucene.Net.Index.Memory.MemoryIndex.CreateSearcher">CreateSearcher()</h4> |
| <div class="markdown level1 summary"><p>Creates and returns a searcher that can be used to execute arbitrary |
| Lucene queries and to collect the resulting query results as hits.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual IndexSearcher CreateSearcher()</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">Lucene.Net.Search.IndexSearcher</span></td> |
| <td><p>a searcher </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_GetMemorySize.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.GetMemorySize%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L604">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_GetMemorySize_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.GetMemorySize*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_GetMemorySize" data-uid="Lucene.Net.Index.Memory.MemoryIndex.GetMemorySize">GetMemorySize()</h4> |
| <div class="markdown level1 summary"><p>Returns a reasonable approximation of the main memory [bytes] consumed by |
| this instance. Useful for smart memory sensititive caches/pools. </p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual long GetMemorySize()</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.Int64</span></td> |
| <td><p>the main memory consumption </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_KeywordTokenStream__1_System_Collections_Generic_ICollection___0__.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.KeywordTokenStream%60%601(System.Collections.Generic.ICollection%7B%60%600%7D)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L271">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_KeywordTokenStream_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.KeywordTokenStream*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_KeywordTokenStream__1_System_Collections_Generic_ICollection___0__" data-uid="Lucene.Net.Index.Memory.MemoryIndex.KeywordTokenStream``1(System.Collections.Generic.ICollection{``0})">KeywordTokenStream<T>(ICollection<T>)</h4> |
| <div class="markdown level1 summary"><p>Convenience method; Creates and returns a token stream that generates a |
| token for each keyword in the given collection, "as is", without any |
| transforming text analysis. The resulting token stream can be fed into |
| <a class="xref" href="Lucene.Net.Index.Memory.MemoryIndex.html#Lucene_Net_Index_Memory_MemoryIndex_AddField_System_String_Lucene_Net_Analysis_TokenStream_">AddField(String, TokenStream)</a>, perhaps wrapped into another |
| <a class="xref" href="http://localhost:8080/api/core/Lucene.Net.Analysis.TokenFilter.html">TokenFilter</a>, as desired.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual TokenStream KeywordTokenStream<T>(ICollection<T> keywords)</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.Collections.Generic.ICollection</span><T></td> |
| <td><span class="parametername">keywords</span></td> |
| <td><p>the keywords to generate tokens for </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.Analysis.TokenStream</span></td> |
| <td><p>the corresponding token stream </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="typeParameters">Type Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="parametername">T</span></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_Reset.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.Reset%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L716">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_Reset_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.Reset*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_Reset" data-uid="Lucene.Net.Index.Memory.MemoryIndex.Reset">Reset()</h4> |
| <div class="markdown level1 summary"><p>Resets the <a class="xref" href="Lucene.Net.Index.Memory.MemoryIndex.html">MemoryIndex</a> to its initial state and recycles all internal buffers.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual void Reset()</code></pre> |
| </div> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_Search_Lucene_Net_Search_Query_.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.Search(Lucene.Net.Search.Query)%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L531">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_Search_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.Search*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_Search_Lucene_Net_Search_Query_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.Search(Lucene.Net.Search.Query)">Search(Query)</h4> |
| <div class="markdown level1 summary"><p>Convenience method that efficiently returns the relevance score by |
| matching this index against the given Lucene query expression.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public virtual float Search(Query 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><span class="xref">Lucene.Net.Search.Query</span></td> |
| <td><span class="parametername">query</span></td> |
| <td><p>an arbitrary Lucene query to run against this index </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.Single</span></td> |
| <td><p>the relevance score of the matchmaking; A number in the range |
| [0.0 .. 1.0], with 0.0 indicating no match. The higher the number |
| the better the match.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <span class="small pull-right mobile-hide"> |
| <span class="divider">|</span> |
| <a href="https://github.com/apache/lucenenet/new/docs/4.8.0-beta00011/websites/apidocs/apiSpec/new?filename=Lucene_Net_Index_Memory_MemoryIndex_ToString.md&value=---%0Auid%3A%20Lucene.Net.Index.Memory.MemoryIndex.ToString%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> |
| </span> |
| <span class="small pull-right mobile-hide"> |
| <a href="https://github.com/NightOwl888/lucenenet/blob/release/Lucene.Net_4_8_0_beta00011/src/Lucene.Net.Memory/MemoryIndex.cs/#L648">View Source</a> |
| </span> |
| <a id="Lucene_Net_Index_Memory_MemoryIndex_ToString_" data-uid="Lucene.Net.Index.Memory.MemoryIndex.ToString*"></a> |
| <h4 id="Lucene_Net_Index_Memory_MemoryIndex_ToString" data-uid="Lucene.Net.Index.Memory.MemoryIndex.ToString">ToString()</h4> |
| <div class="markdown level1 summary"><p>Returns a String representation of the index data for debugging purposes.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public override string ToString()</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> |
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