docs/2.3.3/apidocs/opennlp-tools/opennlp/tools/ml/model/TwoPassDataIndexer.html - opennlp-site - Git at Google

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 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">opennlp.tools.ml.model</a></div>
 <h1 title="Class TwoPassDataIndexer" class="title">Class TwoPassDataIndexer</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
 <div class="inheritance"><a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">opennlp.tools.ml.model.AbstractDataIndexer</a>
 <div class="inheritance">opennlp.tools.ml.model.TwoPassDataIndexer</div>
 </div>
 </div>
 <section class="class-description" id="class-description">
 <dl class="notes">
 <dt>All Implemented Interfaces:</dt>
 <dd><code><a href="DataIndexer.html" title="interface in opennlp.tools.ml.model">DataIndexer</a></code></dd>
 </dl>
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">TwoPassDataIndexer</span>
 <span class="extends-implements">extends <a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></span></div>
 <div class="block">Collecting event and context counts by making two passes over the events.
  <p>
  The first pass determines which contexts will be used by the model, and the
  second pass creates the events in memory containing only the contexts which
  will be used. This greatly reduces the amount of memory required for storing
  the events. During the first pass a temporary event file is created which
  is read during the second pass.</div>
 <dl class="notes">
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="DataIndexer.html" title="interface in opennlp.tools.ml.model"><code>DataIndexer</code></a></li>
 <li><a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model"><code>AbstractDataIndexer</code></a></li>
 </ul>
 </dd>
 </dl>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- =========== FIELD SUMMARY =========== -->
 <li>
 <section class="field-summary" id="field-summary">
 <h2>Field Summary</h2>
 <div class="inherited-list">
 <h3 id="fields-inherited-from-class-opennlp.tools.ml.model.AbstractDataIndexer">Fields inherited from class&nbsp;opennlp.tools.ml.model.<a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></h3>
 <code><a href="AbstractDataIndexer.html#CUTOFF_DEFAULT">CUTOFF_DEFAULT</a>, <a href="AbstractDataIndexer.html#CUTOFF_PARAM">CUTOFF_PARAM</a>, <a href="AbstractDataIndexer.html#SORT_DEFAULT">SORT_DEFAULT</a>, <a href="AbstractDataIndexer.html#SORT_PARAM">SORT_PARAM</a></code></div>
 </section>
 </li>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">TwoPassDataIndexer</a>()</code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 </div>
 </section>
 </li>
 <!-- ========== METHOD SUMMARY =========== -->
 <li>
 <section class="method-summary" id="method-summary">
 <h2>Method Summary</h2>
 <div id="method-summary-table">
 <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
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 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Method</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#index(opennlp.tools.util.ObjectStream)" class="member-name-link">index</a><wbr>(<a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a>&lt;<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>&gt;&nbsp;eventStream)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Performs the data indexing.</div>
 </div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-opennlp.tools.ml.model.AbstractDataIndexer">Methods inherited from class&nbsp;opennlp.tools.ml.model.<a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></h3>
 <code><a href="AbstractDataIndexer.html#getContexts()">getContexts</a>, <a href="AbstractDataIndexer.html#getNumEvents()">getNumEvents</a>, <a href="AbstractDataIndexer.html#getNumTimesEventsSeen()">getNumTimesEventsSeen</a>, <a href="AbstractDataIndexer.html#getOutcomeLabels()">getOutcomeLabels</a>, <a href="AbstractDataIndexer.html#getOutcomeList()">getOutcomeList</a>, <a href="AbstractDataIndexer.html#getPredCounts()">getPredCounts</a>, <a href="AbstractDataIndexer.html#getPredLabels()">getPredLabels</a>, <a href="AbstractDataIndexer.html#getValues()">getValues</a>, <a href="AbstractDataIndexer.html#init(opennlp.tools.util.TrainingParameters,java.util.Map)">init</a></code></div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
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 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;()">
 <h3>TwoPassDataIndexer</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">TwoPassDataIndexer</span>()</div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="index(opennlp.tools.util.ObjectStream)">
 <h3>index</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">index</span><wbr><span class="parameters">(<a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a>&lt;<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>&gt;&nbsp;eventStream)</span>
            throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
 <div class="block">Performs the data indexing.
  <p>
  <b>Note:</b>
  Make sure the <a href="DataIndexer.html#init(opennlp.tools.util.TrainingParameters,java.util.Map)"><code>DataIndexer.init(TrainingParameters, Map)</code></a> method is called first.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>eventStream</code> - A <code><a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a>&lt;<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>&gt;</code> of events used as input.</dd>
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - Thrown if IO errors occurred during indexing.</dd>
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	<div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">opennlp.tools.ml.model</a></div>
	<h1 title="Class TwoPassDataIndexer" class="title">Class TwoPassDataIndexer</h1>
	</div>
	<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
	<div class="inheritance"><a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">opennlp.tools.ml.model.AbstractDataIndexer</a>
	<div class="inheritance">opennlp.tools.ml.model.TwoPassDataIndexer</div>
	</div>
	</div>
	<section class="class-description" id="class-description">
	<dl class="notes">
	<dt>All Implemented Interfaces:</dt>
	<dd><code><a href="DataIndexer.html" title="interface in opennlp.tools.ml.model">DataIndexer</a></code></dd>
	</dl>
	<hr>
	<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">TwoPassDataIndexer</span>
	<span class="extends-implements">extends <a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></span></div>
	<div class="block">Collecting event and context counts by making two passes over the events.
	<p>
	The first pass determines which contexts will be used by the model, and the
	second pass creates the events in memory containing only the contexts which
	will be used. This greatly reduces the amount of memory required for storing
	the events. During the first pass a temporary event file is created which
	is read during the second pass.</div>
	<dl class="notes">
	<dt>See Also:</dt>
	<dd>
	<ul class="see-list">
	<li><a href="DataIndexer.html" title="interface in opennlp.tools.ml.model"><code>DataIndexer</code></a></li>
	<li><a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model"><code>AbstractDataIndexer</code></a></li>
	</ul>
	</dd>
	</dl>
	</section>
	<section class="summary">
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	<!-- =========== FIELD SUMMARY =========== -->
	<li>
	<section class="field-summary" id="field-summary">
	<h2>Field Summary</h2>
	<div class="inherited-list">
	<h3 id="fields-inherited-from-class-opennlp.tools.ml.model.AbstractDataIndexer">Fields inherited from class opennlp.tools.ml.model.<a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></h3>
	<code><a href="AbstractDataIndexer.html#CUTOFF_DEFAULT">CUTOFF_DEFAULT</a>, <a href="AbstractDataIndexer.html#CUTOFF_PARAM">CUTOFF_PARAM</a>, <a href="AbstractDataIndexer.html#SORT_DEFAULT">SORT_DEFAULT</a>, <a href="AbstractDataIndexer.html#SORT_PARAM">SORT_PARAM</a></code></div>
	</section>
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	<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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	<h2>Constructor Summary</h2>
	<div class="caption"><span>Constructors</span></div>
	<div class="summary-table two-column-summary">
	<div class="table-header col-first">Constructor</div>
	<div class="table-header col-last">Description</div>
	<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">TwoPassDataIndexer</a>()</code></div>
	<div class="col-last even-row-color"> </div>
	</div>
	</section>
	</li>
	<!-- ========== METHOD SUMMARY =========== -->
	<li>
	<section class="method-summary" id="method-summary">
	<h2>Method Summary</h2>
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	<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
	<div id="method-summary-table.tabpanel" role="tabpanel">
	<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
	<div class="table-header col-first">Modifier and Type</div>
	<div class="table-header col-second">Method</div>
	<div class="table-header col-last">Description</div>
	<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
	<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#index(opennlp.tools.util.ObjectStream)" class="member-name-link">index</a><wbr>(<a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a><<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>> eventStream)</code></div>
	<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
	<div class="block">Performs the data indexing.</div>
	</div>
	</div>
	</div>
	</div>
	<div class="inherited-list">
	<h3 id="methods-inherited-from-class-opennlp.tools.ml.model.AbstractDataIndexer">Methods inherited from class opennlp.tools.ml.model.<a href="AbstractDataIndexer.html" title="class in opennlp.tools.ml.model">AbstractDataIndexer</a></h3>
	<code><a href="AbstractDataIndexer.html#getContexts()">getContexts</a>, <a href="AbstractDataIndexer.html#getNumEvents()">getNumEvents</a>, <a href="AbstractDataIndexer.html#getNumTimesEventsSeen()">getNumTimesEventsSeen</a>, <a href="AbstractDataIndexer.html#getOutcomeLabels()">getOutcomeLabels</a>, <a href="AbstractDataIndexer.html#getOutcomeList()">getOutcomeList</a>, <a href="AbstractDataIndexer.html#getPredCounts()">getPredCounts</a>, <a href="AbstractDataIndexer.html#getPredLabels()">getPredLabels</a>, <a href="AbstractDataIndexer.html#getValues()">getValues</a>, <a href="AbstractDataIndexer.html#init(opennlp.tools.util.TrainingParameters,java.util.Map)">init</a></code></div>
	<div class="inherited-list">
	<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
	<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
	</section>
	</li>
	</ul>
	</section>
	<section class="details">
	<ul class="details-list">
	<!-- ========= CONSTRUCTOR DETAIL ======== -->
	<li>
	<section class="constructor-details" id="constructor-detail">
	<h2>Constructor Details</h2>
	<ul class="member-list">
	<li>
	<section class="detail" id="<init>()">
	<h3>TwoPassDataIndexer</h3>
	<div class="member-signature"><span class="modifiers">public</span> <span class="element-name">TwoPassDataIndexer</span>()</div>
	</section>
	</li>
	</ul>
	</section>
	</li>
	<!-- ============ METHOD DETAIL ========== -->
	<li>
	<section class="method-details" id="method-detail">
	<h2>Method Details</h2>
	<ul class="member-list">
	<li>
	<section class="detail" id="index(opennlp.tools.util.ObjectStream)">
	<h3>index</h3>
	<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">index</span><wbr><span class="parameters">(<a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a><<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>> eventStream)</span>
	throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div>
	<div class="block">Performs the data indexing.
	<p>
	<b>Note:</b>
	Make sure the <a href="DataIndexer.html#init(opennlp.tools.util.TrainingParameters,java.util.Map)"><code>DataIndexer.init(TrainingParameters, Map)</code></a> method is called first.</div>
	<dl class="notes">
	<dt>Parameters:</dt>
	<dd><code>eventStream</code> - A <code><a href="../../util/ObjectStream.html" title="interface in opennlp.tools.util">ObjectStream</a><<a href="Event.html" title="class in opennlp.tools.ml.model">Event</a>></code> of events used as input.</dd>
	<dt>Throws:</dt>
	<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - Thrown if IO errors occurred during indexing.</dd>
	</dl>
	</section>
	</li>
	</ul>
	</section>
	</li>
	</ul>
	</section>
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