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<title>OpN (Apache Jena ARQ)</title>
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<meta name="description" content="declaration: module: org.apache.jena.arq, package: org.apache.jena.sparql.algebra.op, class: OpN">
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<div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../../../module-summary.html">org.apache.jena.arq</a></div>
<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.jena.sparql.algebra.op</a></div>
<h1 title="Class OpN" class="title">Class OpN</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="../../util/PrintSerializableBase.html" title="class in org.apache.jena.sparql.util">org.apache.jena.sparql.util.PrintSerializableBase</a>
<div class="inheritance"><a href="OpBase.html" title="class in org.apache.jena.sparql.algebra.op">org.apache.jena.sparql.algebra.op.OpBase</a>
<div class="inheritance">org.apache.jena.sparql.algebra.op.OpN</div>
</div>
</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code>org.apache.jena.atlas.io.Printable</code>, <code><a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></code>, <code><a href="../../util/Named.html" title="interface in org.apache.jena.sparql.util">Named</a></code>, <code><a href="../../util/PrintSerializable.html" title="interface in org.apache.jena.sparql.util">PrintSerializable</a></code></dd>
</dl>
<dl class="notes">
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="OpDisjunction.html" title="class in org.apache.jena.sparql.algebra.op">OpDisjunction</a></code>, <code><a href="OpSequence.html" title="class in org.apache.jena.sparql.algebra.op">OpSequence</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public abstract class </span><span class="element-name type-name-label">OpN</span>
<span class="extends-implements">extends <a href="OpBase.html" title="class in org.apache.jena.sparql.algebra.op">OpBase</a></span></div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ========== 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-tab3" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab3', 3)" class="table-tab">Abstract 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="#add(org.apache.jena.sparql.algebra.Op)" class="member-name-link">add</a><wbr>(<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&nbsp;op)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Accumulate an op in the OpN.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>abstract <a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#apply(org.apache.jena.sparql.algebra.Transform,java.util.List)" class="member-name-link">apply</a><wbr>(<a href="../Transform.html" title="interface in org.apache.jena.sparql.algebra">Transform</a>&nbsp;transform,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;&nbsp;elts)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>abstract <a href="OpN.html" title="class in org.apache.jena.sparql.algebra.op">OpN</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#copy(java.util.List)" class="member-name-link">copy</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;&nbsp;elts)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#get(int)" class="member-name-link">get</a><wbr>(int&nbsp;idx)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getElements()" class="member-name-link">getElements</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#hashCode()" class="member-name-link">hashCode</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Iterator.html" title="class or interface in java.util" class="external-link">Iterator</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#iterator()" class="member-name-link">iterator</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#size()" class="member-name-link">size</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.jena.sparql.algebra.op.OpBase">Methods inherited from class&nbsp;org.apache.jena.sparql.algebra.op.<a href="OpBase.html" title="class in org.apache.jena.sparql.algebra.op">OpBase</a></h3>
<code><a href="OpBase.html#equals(java.lang.Object)">equals</a>, <a href="OpBase.html#equalTo(org.apache.jena.sparql.algebra.Op,org.apache.jena.sparql.util.NodeIsomorphismMap)">equalTo</a>, <a href="OpBase.html#output(org.apache.jena.atlas.io.IndentedWriter)">output</a>, <a href="OpBase.html#output(org.apache.jena.atlas.io.IndentedWriter,org.apache.jena.sparql.serializer.SerializationContext)">output</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.jena.sparql.util.PrintSerializableBase">Methods inherited from class&nbsp;org.apache.jena.sparql.util.<a href="../../util/PrintSerializableBase.html" title="class in org.apache.jena.sparql.util">PrintSerializableBase</a></h3>
<code><a href="../../util/PrintSerializableBase.html#toString()">toString</a>, <a href="../../util/PrintSerializableBase.html#toString(org.apache.jena.shared.PrefixMapping)">toString</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>
<code><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#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#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>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.jena.sparql.util.Named">Methods inherited from interface&nbsp;org.apache.jena.sparql.util.<a href="../../util/Named.html" title="interface in org.apache.jena.sparql.util">Named</a></h3>
<code><a href="../../util/Named.html#getName()">getName</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.jena.sparql.algebra.Op">Methods inherited from interface&nbsp;org.apache.jena.sparql.algebra.<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></h3>
<code><a href="../Op.html#visit(org.apache.jena.sparql.algebra.OpVisitor)">visit</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.jena.sparql.util.PrintSerializable">Methods inherited from interface&nbsp;org.apache.jena.sparql.util.<a href="../../util/PrintSerializable.html" title="interface in org.apache.jena.sparql.util">PrintSerializable</a></h3>
<code><a href="../../util/PrintSerializable.html#toString(org.apache.jena.shared.PrefixMapping)">toString</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="add(org.apache.jena.sparql.algebra.Op)">
<h3>add</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">add</span><wbr><span class="parameters">(<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&nbsp;op)</span></div>
<div class="block">Accumulate an op in the OpN.
This exists to help building OpN in the first place.
Once built, an OpN, like any Op should be treated as immutable
with no calls change the sub ops contents.
No calls to .add.</div>
</section>
</li>
<li>
<section class="detail" id="get(int)">
<h3>get</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></span>&nbsp;<span class="element-name">get</span><wbr><span class="parameters">(int&nbsp;idx)</span></div>
</section>
</li>
<li>
<section class="detail" id="apply(org.apache.jena.sparql.algebra.Transform,java.util.List)">
<h3>apply</h3>
<div class="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type"><a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a></span>&nbsp;<span class="element-name">apply</span><wbr><span class="parameters">(<a href="../Transform.html" title="interface in org.apache.jena.sparql.algebra">Transform</a>&nbsp;transform,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;&nbsp;elts)</span></div>
</section>
</li>
<li>
<section class="detail" id="copy(java.util.List)">
<h3>copy</h3>
<div class="member-signature"><span class="modifiers">public abstract</span>&nbsp;<span class="return-type"><a href="OpN.html" title="class in org.apache.jena.sparql.algebra.op">OpN</a></span>&nbsp;<span class="element-name">copy</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;&nbsp;elts)</span></div>
</section>
</li>
<li>
<section class="detail" id="size()">
<h3>size</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">size</span>()</div>
</section>
</li>
<li>
<section class="detail" id="hashCode()">
<h3>hashCode</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">hashCode</span>()</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="OpBase.html#hashCode()">hashCode</a></code>&nbsp;in class&nbsp;<code><a href="OpBase.html" title="class in org.apache.jena.sparql.algebra.op">OpBase</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getElements()">
<h3>getElements</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;</span>&nbsp;<span class="element-name">getElements</span>()</div>
</section>
</li>
<li>
<section class="detail" id="iterator()">
<h3>iterator</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Iterator.html" title="class or interface in java.util" class="external-link">Iterator</a>&lt;<a href="../Op.html" title="interface in org.apache.jena.sparql.algebra">Op</a>&gt;</span>&nbsp;<span class="element-name">iterator</span>()</div>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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