# NonTerminalNode

## Content

<div class="docapp-java-api-doc-main"><style>:not(h1, h2, h3, h4, h5, h6)>code,
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/*
 * Styles for contents.
 */
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/*
 * Styles for user-provided tables.
 *
 * borderless:
 *      No borders, vertical margins, styled caption.
 *      This style is provided for use with existing doc comments.
 *      In general, borderless tables should not be used for layout purposes.
 *
 * plain:
 *      Plain borders around table and cells, vertical margins, styled caption.
 *      Best for small tables or for complex tables for tables with cells that span
 *      rows and columns, when the "striped" style does not work well.
 *
 * striped:
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 *      vertical margins, styled caption.
 *      Best for tables that have a header row, and a body containing a series of simple rows.
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table.striped>tbody>tr>th {
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</style><h1>Class NonTerminalNode</h1>
<!-- ======== START OF CLASS DATA ======== -->

<div class="inheritance" title="Inheritance Tree"><a class="external-link" href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</a>
<div class="inheritance"><a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">com.grapecity.documents.excel.expressions.SyntaxNode</a>
<div class="inheritance">com.grapecity.documents.excel.expressions.NonTerminalNode</div>
</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="FunctionNode.html" title="class in com.grapecity.documents.excel.expressions">FunctionNode</a></code>, <code><a href="OperatorNode.html" title="class in com.grapecity.documents.excel.expressions">OperatorNode</a></code>, <code><a href="ParenthesisNode.html" title="class in com.grapecity.documents.excel.expressions">ParenthesisNode</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public abstract class </span><span class="element-name type-name-label">NonTerminalNode</span>
<span class="extends-implements">extends <a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">SyntaxNode</a></span></div>
<div class="block">Represents a non-terminal node in a formula syntax tree. <p>A  <code>NonTerminalNode</code> is a <a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions"><code>SyntaxNode</code></a> that can contain one or more child nodes. It serves as the base type for composite syntax elements, such as  function calls, operators, and parenthesized expressions, where the expression  structure is represented by nested  <a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions"><code>SyntaxNode</code></a> instances.</p><p>The child collection returned by  <a href="#getChildren()"><code>getChildren()</code></a> contains the immediate descendants of this node and is used to build and traverse the syntax tree.</p></div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== 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 class="member-name-link" href="#%3Cinit%3E()">NonTerminalNode</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 aria-orientation="horizontal" class="table-tabs" role="tablist"><button aria-controls="method-summary-table.tabpanel" aria-selected="true" class="active-table-tab" id="method-summary-table-tab0" onclick="show('method-summary-table', 'method-summary-table', 3)" onkeydown="switchTab(event)" role="tab" tabindex="0">All Methods</button><button aria-controls="method-summary-table.tabpanel" aria-selected="false" class="table-tab" id="method-summary-table-tab2" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" onkeydown="switchTab(event)" role="tab" tabindex="-1">Instance Methods</button><button aria-controls="method-summary-table.tabpanel" aria-selected="false" class="table-tab" id="method-summary-table-tab4" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" onkeydown="switchTab(event)" role="tab" tabindex="-1">Concrete Methods</button></div>
<div id="method-summary-table.tabpanel" role="tabpanel">
<div aria-labelledby="method-summary-table-tab0" class="summary-table three-column-summary">
<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><a class="external-link" href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util">List</a>&lt;<a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">SyntaxNode</a>&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a class="member-name-link" href="#getChildren()">getChildren</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Gets the immediate child nodes of this non-terminal node.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-com.grapecity.documents.excel.expressions.SyntaxNode">Methods inherited from class&nbsp;com.grapecity.documents.excel.expressions.<a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">SyntaxNode</a></h3>
<code><a href="SyntaxNode.html#clone()">clone</a>, <a href="SyntaxNode.html#equals(java.lang.Object)">equals</a>, <a href="SyntaxNode.html#hashCode()">hashCode</a>, <a href="SyntaxNode.html#Parse(java.lang.String)">Parse</a>, <a href="SyntaxNode.html#Parse(java.lang.String,com.grapecity.documents.excel.expressions.ParseContext)">Parse</a>, <a href="SyntaxNode.html#toString()">toString</a>, <a href="SyntaxNode.html#toString(com.grapecity.documents.excel.expressions.UnParseContext)">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 class="external-link" href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang">Object</a></h3>
<code><a class="external-link" href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</a>, <a class="external-link" 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">getClass</a>, <a class="external-link" 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">notify</a>, <a class="external-link" 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">notifyAll</a>, <a class="external-link" 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">wait</a>, <a class="external-link" 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">wait</a>, <a class="external-link" 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">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>NonTerminalNode</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">NonTerminalNode</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="getChildren()">
<h3>getChildren</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a class="external-link" href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util">List</a>&lt;<a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">SyntaxNode</a>&gt;</span>&nbsp;<span class="element-name">getChildren</span>()</div>
<div class="block">Gets the immediate child nodes of this non-terminal node. <p>Use this method to inspect the nested structure of a composite formula expression,  such as a function call, operator expression, or parenthesized expression. The returned  list is this node's child collection, and its elements are not  <code>null</code>.</p>
<pre><code data-language="Java">
 SyntaxNode node = SyntaxNode.Parse("SUM(A1,B1)");
 NonTerminalNode nonTerminalNode = (NonTerminalNode) node;
 List&lt;SyntaxNode&gt; children = nonTerminalNode.getChildren();
 SyntaxNode firstChild = children.get(0);
 String firstArgument = firstChild.toString();
 </code></pre></div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="SyntaxNode.html#getChildren()">getChildren</a></code>&nbsp;in class&nbsp;<code><a href="SyntaxNode.html" title="class in com.grapecity.documents.excel.expressions">SyntaxNode</a></code></dd>
<dt>Returns:</dt>
<dd>A list containing the immediate child nodes of this non-terminal node.</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
<!-- ========= END OF CLASS DATA ========= -->
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