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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.linq4j.tree</a></div>
<h1 title="Class DeterministicCodeOptimizer" class="title">Class DeterministicCodeOptimizer</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="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">org.apache.calcite.linq4j.tree.Shuttle</a>
<div class="inheritance"><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">org.apache.calcite.linq4j.tree.ClassDeclarationFinder</a>
<div class="inheritance">org.apache.calcite.linq4j.tree.DeterministicCodeOptimizer</div>
</div>
</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">DeterministicCodeOptimizer</span>
<span class="extends-implements">extends <a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></span></div>
<div class="block">Factors out deterministic expressions to final static fields.
Instances of this class should not be reused, so new visitor should be
created for optimizing a new expression tree.</div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>protected final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/IdentityHashMap.html" title="class or interface in java.util" class="external-link">IdentityHashMap</a>&lt;<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Boolean.html" title="class or interface in java.lang" class="external-link">Boolean</a>&gt;</code></div>
<div class="col-second even-row-color"><code><a href="#constants" class="member-name-link">constants</a></code></div>
<div class="col-last even-row-color">
<div class="block">The map contains known to be effectively-final expression.</div>
</div>
<div class="col-first odd-row-color"><code>protected final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>,<wbr><a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a>&gt;</code></div>
<div class="col-second odd-row-color"><code><a href="#dedup" class="member-name-link">dedup</a></code></div>
<div class="col-last odd-row-color">
<div class="block">The map that de-duplicates expressions, so the same expressions may reuse
the same final static fields.</div>
</div>
<div class="col-first even-row-color"><code>protected final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr><a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a>&gt;</code></div>
<div class="col-second even-row-color"><code><a href="#fieldsByName" class="member-name-link">fieldsByName</a></code></div>
<div class="col-last even-row-color">
<div class="block">The map of all the added final static fields.</div>
</div>
</div>
<div class="inherited-list">
<h3 id="fields-inherited-from-class-org.apache.calcite.linq4j.tree.ClassDeclarationFinder">Fields inherited from class&nbsp;org.apache.calcite.linq4j.tree.<a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></h3>
<code><a href="ClassDeclarationFinder.html#addedDeclarations">addedDeclarations</a>, <a href="ClassDeclarationFinder.html#parent">parent</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(org.apache.calcite.linq4j.tree.ClassDeclarationFinder)" class="member-name-link">DeterministicCodeOptimizer</a><wbr>(<a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a>&nbsp;parent)</code></div>
<div class="col-last even-row-color">
<div class="block">Creates a child optimizer.</div>
</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>
<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>protected boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#allMethodsDeterministic(java.lang.Class)" class="member-name-link">allMethodsDeterministic</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&nbsp;klass)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Checks if all the methods in given class are deterministic (i.e.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#createField(org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">createField</a><wbr>(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Creates final static field to hold the given expression.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected @Nullable <a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#findDeclaredExpression(org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">findDeclaredExpression</a><wbr>(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Finds if there exists ready for reuse declaration for given expression.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="DeterministicCodeOptimizer.html" title="class in org.apache.calcite.linq4j.tree">DeterministicCodeOptimizer</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#goDeeper()" class="member-name-link">goDeeper</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Creates child visitor.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#hasField(java.lang.String)" class="member-name-link">hasField</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;name)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Verifies if the variable name is already in use.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#inventFieldName(org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">inventFieldName</a><wbr>(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Generates field name to store given expression.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isConstant(org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">isConstant</a><wbr>(@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Verifies if the expression is effectively constant.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isConstructorDeterministic(org.apache.calcite.linq4j.tree.NewExpression)" class="member-name-link">isConstructorDeterministic</a><wbr>(<a href="NewExpression.html" title="class in org.apache.calcite.linq4j.tree">NewExpression</a>&nbsp;newExpression)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Checks if new instance creation can be reused.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isMethodDeterministic(java.lang.reflect.Method)" class="member-name-link">isMethodDeterministic</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/reflect/Method.html" title="class or interface in java.lang.reflect" class="external-link">Method</a>&nbsp;method)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Checks if given method is deterministic (i.e.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#learnFinalStaticDeclarations(java.util.List)" class="member-name-link">learnFinalStaticDeclarations</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="MemberDeclaration.html" title="class in org.apache.calcite.linq4j.tree">MemberDeclaration</a>&gt;&nbsp;memberDeclarations)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Processes the list of declarations and learns final static ones as
effectively constant.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#tryOptimizeMethodCall(org.apache.calcite.linq4j.tree.MethodCallExpression)" class="member-name-link">tryOptimizeMethodCall</a><wbr>(<a href="MethodCallExpression.html" title="class in org.apache.calcite.linq4j.tree">MethodCallExpression</a>&nbsp;methodCallExpression)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Optimized method call, possibly converting it to final static field.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#tryOptimizeNewInstance(org.apache.calcite.linq4j.tree.NewExpression)" class="member-name-link">tryOptimizeNewInstance</a><wbr>(<a href="NewExpression.html" title="class in org.apache.calcite.linq4j.tree">NewExpression</a>&nbsp;newExpression)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Optimizes <code>new Type()</code> constructs.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.BinaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="BinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">BinaryExpression</a>&nbsp;binaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression0,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression1)</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><a href="MemberDeclaration.html" title="class in org.apache.calcite.linq4j.tree">MemberDeclaration</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.FieldDeclaration,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="FieldDeclaration.html" title="class in org.apache.calcite.linq4j.tree">FieldDeclaration</a>&nbsp;fieldDeclaration,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;initializer)</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="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.MemberExpression,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="MemberExpression.html" title="class in org.apache.calcite.linq4j.tree">MemberExpression</a>&nbsp;memberExpression,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</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><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.MethodCallExpression,org.apache.calcite.linq4j.tree.Expression,java.util.List)" class="member-name-link">visit</a><wbr>(<a href="MethodCallExpression.html" title="class in org.apache.calcite.linq4j.tree">MethodCallExpression</a>&nbsp;methodCallExpression,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;targetExpression,
<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="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&gt;&nbsp;expressions)</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="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.TernaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="TernaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TernaryExpression</a>&nbsp;ternaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression0,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression1,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression2)</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><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.TypeBinaryExpression,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="TypeBinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TypeBinaryExpression</a>&nbsp;typeBinaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</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="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#visit(org.apache.calcite.linq4j.tree.UnaryExpression,org.apache.calcite.linq4j.tree.Expression)" class="member-name-link">visit</a><wbr>(<a href="UnaryExpression.html" title="class in org.apache.calcite.linq4j.tree">UnaryExpression</a>&nbsp;unaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</code></div>
<div class="col-last even-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.calcite.linq4j.tree.ClassDeclarationFinder">Methods inherited from class&nbsp;org.apache.calcite.linq4j.tree.<a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></h3>
<code><a href="ClassDeclarationFinder.html#create()">create</a>, <a href="ClassDeclarationFinder.html#create(java.lang.Class)">create</a>, <a href="ClassDeclarationFinder.html#create(org.apache.calcite.linq4j.function.Function1)">create</a>, <a href="ClassDeclarationFinder.html#isConstant(java.lang.Iterable)">isConstant</a>, <a href="ClassDeclarationFinder.html#optimizeDeclarations(java.util.List)">optimizeDeclarations</a>, <a href="ClassDeclarationFinder.html#preVisit(org.apache.calcite.linq4j.tree.ClassDeclaration)">preVisit</a>, <a href="ClassDeclarationFinder.html#preVisit(org.apache.calcite.linq4j.tree.NewExpression)">preVisit</a>, <a href="ClassDeclarationFinder.html#visit(org.apache.calcite.linq4j.tree.ClassDeclaration,java.util.List)">visit</a>, <a href="ClassDeclarationFinder.html#visit(org.apache.calcite.linq4j.tree.NewExpression,java.util.List,java.util.List)">visit</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.calcite.linq4j.tree.Shuttle">Methods inherited from class&nbsp;org.apache.calcite.linq4j.tree.<a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></h3>
<code><a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.BinaryExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.BlockStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.ConditionalStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.ConstructorDeclaration)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.DeclarationStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.FieldDeclaration)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.ForEachStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.ForStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.FunctionExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.GotoStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.IndexExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.MemberExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.MethodCallExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.MethodDeclaration)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.NewArrayExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.TernaryExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.ThrowStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.TryStatement)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.TypeBinaryExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.UnaryExpression)">preVisit</a>, <a href="Shuttle.html#preVisit(org.apache.calcite.linq4j.tree.WhileStatement)">preVisit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.BlockStatement,java.util.List)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ConditionalStatement,java.util.List)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ConstantExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ConstructorDeclaration,org.apache.calcite.linq4j.tree.BlockStatement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.DeclarationStatement,org.apache.calcite.linq4j.tree.Expression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.DefaultExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.DynamicExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ForEachStatement,org.apache.calcite.linq4j.tree.ParameterExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Statement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ForStatement,java.util.List,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Statement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.FunctionExpression,org.apache.calcite.linq4j.tree.BlockStatement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.GotoStatement,org.apache.calcite.linq4j.tree.Expression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.IndexExpression,org.apache.calcite.linq4j.tree.Expression,java.util.List)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.InvocationExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.LabelStatement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.LambdaExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ListInitExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.MemberInitExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.MethodDeclaration,org.apache.calcite.linq4j.tree.BlockStatement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.NewArrayExpression,int,org.apache.calcite.linq4j.tree.Expression,java.util.List)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ParameterExpression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.SwitchStatement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.ThrowStatement,org.apache.calcite.linq4j.tree.Expression)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.TryStatement,org.apache.calcite.linq4j.tree.Statement,java.util.List,org.apache.calcite.linq4j.tree.Statement)">visit</a>, <a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.WhileStatement,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Statement)">visit</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#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <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#finalize()" title="class or interface in java.lang" class="external-link">finalize</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">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="constants">
<h3>constants</h3>
<div class="member-signature"><span class="modifiers">protected final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/IdentityHashMap.html" title="class or interface in java.util" class="external-link">IdentityHashMap</a>&lt;<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>,<wbr><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Boolean.html" title="class or interface in java.lang" class="external-link">Boolean</a>&gt;</span>&nbsp;<span class="element-name">constants</span></div>
<div class="block">The map contains known to be effectively-final expression.
The map uses identity equality.
Typically the key is <code>ParameterExpression</code>, however there might be
non-factored to final field expression that is known to be constant.
For instance, cast expression will not be factored to a field,
but we still need to track its constant status.</div>
</section>
</li>
<li>
<section class="detail" id="dedup">
<h3>dedup</h3>
<div class="member-signature"><span class="modifiers">protected final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>,<wbr><a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a>&gt;</span>&nbsp;<span class="element-name">dedup</span></div>
<div class="block">The map that de-duplicates expressions, so the same expressions may reuse
the same final static fields.</div>
</section>
</li>
<li>
<section class="detail" id="fieldsByName">
<h3>fieldsByName</h3>
<div class="member-signature"><span class="modifiers">protected final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a>&lt;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>,<wbr><a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a>&gt;</span>&nbsp;<span class="element-name">fieldsByName</span></div>
<div class="block">The map of all the added final static fields. Allows to identify if the
name is occupied or not.</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ========= 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;(org.apache.calcite.linq4j.tree.ClassDeclarationFinder)">
<h3>DeterministicCodeOptimizer</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">DeterministicCodeOptimizer</span><wbr><span class="parameters">(<a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a>&nbsp;parent)</span></div>
<div class="block">Creates a child optimizer.
Typically a child is created for each class declaration,
so each optimizer collects fields for exactly one class.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>parent</code> - parent optimizer</dd>
</dl>
</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="tryOptimizeNewInstance(org.apache.calcite.linq4j.tree.NewExpression)">
<h3>tryOptimizeNewInstance</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">tryOptimizeNewInstance</span><wbr><span class="parameters">(<a href="NewExpression.html" title="class in org.apache.calcite.linq4j.tree">NewExpression</a>&nbsp;newExpression)</span></div>
<div class="block">Optimizes <code>new Type()</code> constructs.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#tryOptimizeNewInstance(org.apache.calcite.linq4j.tree.NewExpression)">tryOptimizeNewInstance</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Parameters:</dt>
<dd><code>newExpression</code> - expression to optimize</dd>
<dt>Returns:</dt>
<dd>optimized expression</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.BinaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="BinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">BinaryExpression</a>&nbsp;binaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression0,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression1)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.BinaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.TernaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="TernaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TernaryExpression</a>&nbsp;ternaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression0,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression1,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression2)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.TernaryExpression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.UnaryExpression,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="UnaryExpression.html" title="class in org.apache.calcite.linq4j.tree">UnaryExpression</a>&nbsp;unaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.UnaryExpression,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.TypeBinaryExpression,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="TypeBinaryExpression.html" title="class in org.apache.calcite.linq4j.tree">TypeBinaryExpression</a>&nbsp;typeBinaryExpression,
<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.TypeBinaryExpression,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="tryOptimizeMethodCall(org.apache.calcite.linq4j.tree.MethodCallExpression)">
<h3>tryOptimizeMethodCall</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">tryOptimizeMethodCall</span><wbr><span class="parameters">(<a href="MethodCallExpression.html" title="class in org.apache.calcite.linq4j.tree">MethodCallExpression</a>&nbsp;methodCallExpression)</span></div>
<div class="block">Optimized method call, possibly converting it to final static field.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>methodCallExpression</code> - method call to optimize</dd>
<dt>Returns:</dt>
<dd>optimized expression</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.MethodCallExpression,org.apache.calcite.linq4j.tree.Expression,java.util.List)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="MethodCallExpression.html" title="class in org.apache.calcite.linq4j.tree">MethodCallExpression</a>&nbsp;methodCallExpression,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;targetExpression,
<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="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&gt;&nbsp;expressions)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.MethodCallExpression,org.apache.calcite.linq4j.tree.Expression,java.util.List)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.MemberExpression,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="MemberExpression.html" title="class in org.apache.calcite.linq4j.tree">MemberExpression</a>&nbsp;memberExpression,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.MemberExpression,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="visit(org.apache.calcite.linq4j.tree.FieldDeclaration,org.apache.calcite.linq4j.tree.Expression)">
<h3>visit</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="MemberDeclaration.html" title="class in org.apache.calcite.linq4j.tree">MemberDeclaration</a></span>&nbsp;<span class="element-name">visit</span><wbr><span class="parameters">(<a href="FieldDeclaration.html" title="class in org.apache.calcite.linq4j.tree">FieldDeclaration</a>&nbsp;fieldDeclaration,
@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;initializer)</span></div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="Shuttle.html#visit(org.apache.calcite.linq4j.tree.FieldDeclaration,org.apache.calcite.linq4j.tree.Expression)">visit</a></code>&nbsp;in class&nbsp;<code><a href="Shuttle.html" title="class in org.apache.calcite.linq4j.tree">Shuttle</a></code></dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="learnFinalStaticDeclarations(java.util.List)">
<h3>learnFinalStaticDeclarations</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">learnFinalStaticDeclarations</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="MemberDeclaration.html" title="class in org.apache.calcite.linq4j.tree">MemberDeclaration</a>&gt;&nbsp;memberDeclarations)</span></div>
<div class="block">Processes the list of declarations and learns final static ones as
effectively constant.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#learnFinalStaticDeclarations(java.util.List)">learnFinalStaticDeclarations</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Parameters:</dt>
<dd><code>memberDeclarations</code> - list of declarations to search finals from</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="findDeclaredExpression(org.apache.calcite.linq4j.tree.Expression)">
<h3>findDeclaredExpression</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">@Nullable <a href="ParameterExpression.html" title="class in org.apache.calcite.linq4j.tree">ParameterExpression</a></span>&nbsp;<span class="element-name">findDeclaredExpression</span><wbr><span class="parameters">(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<div class="block">Finds if there exists ready for reuse declaration for given expression.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#findDeclaredExpression(org.apache.calcite.linq4j.tree.Expression)">findDeclaredExpression</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Parameters:</dt>
<dd><code>expression</code> - input expression</dd>
<dt>Returns:</dt>
<dd>parameter of the already existing declaration, or null</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="createField(org.apache.calcite.linq4j.tree.Expression)">
<h3>createField</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span>&nbsp;<span class="element-name">createField</span><wbr><span class="parameters">(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<div class="block">Creates final static field to hold the given expression.
The method might reuse existing declarations if appropriate.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>expression</code> - expression to store in final field</dd>
<dt>Returns:</dt>
<dd>expression for the given input expression</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="inventFieldName(org.apache.calcite.linq4j.tree.Expression)">
<h3>inventFieldName</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">inventFieldName</span><wbr><span class="parameters">(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<div class="block">Generates field name to store given expression.
The expression is converted to string and all the non-ascii/numeric
characters are replaced with underscores and <code>"_$L4J$C$"</code> suffix is
added to avoid conflicts with other variables.
When multiple variables are mangled to the same name,
counter is used to avoid conflicts.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>expression</code> - input expression</dd>
<dt>Returns:</dt>
<dd>unique name to store given expression</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isConstant(org.apache.calcite.linq4j.tree.Expression)">
<h3>isConstant</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isConstant</span><wbr><span class="parameters">(@Nullable <a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression)</span></div>
<div class="block">Verifies if the expression is effectively constant.
It is assumed the expression is simple (e.g. <code>ConstantExpression</code> or
<code>ParameterExpression</code>).
The method verifies parent chain since the expression might be defined
in enclosing class.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#isConstant(org.apache.calcite.linq4j.tree.Expression)">isConstant</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Parameters:</dt>
<dd><code>expression</code> - expression to test</dd>
<dt>Returns:</dt>
<dd>true when the expression is known to be constant</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isMethodDeterministic(java.lang.reflect.Method)">
<h3>isMethodDeterministic</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isMethodDeterministic</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/reflect/Method.html" title="class or interface in java.lang.reflect" class="external-link">Method</a>&nbsp;method)</span></div>
<div class="block">Checks if given method is deterministic (i.e. returns the same output
given the same inputs).</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>method</code> - method to test</dd>
<dt>Returns:</dt>
<dd>true when the method is deterministic</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isConstructorDeterministic(org.apache.calcite.linq4j.tree.NewExpression)">
<h3>isConstructorDeterministic</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isConstructorDeterministic</span><wbr><span class="parameters">(<a href="NewExpression.html" title="class in org.apache.calcite.linq4j.tree">NewExpression</a>&nbsp;newExpression)</span></div>
<div class="block">Checks if new instance creation can be reused. For instance <code>new
BigInteger("42")</code> is effectively final and can be reused.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>newExpression</code> - method to test</dd>
<dt>Returns:</dt>
<dd>true when the method is deterministic</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="allMethodsDeterministic(java.lang.Class)">
<h3>allMethodsDeterministic</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">allMethodsDeterministic</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&nbsp;klass)</span></div>
<div class="block">Checks if all the methods in given class are deterministic (i.e. return
the same value given the same inputs)</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>klass</code> - class to test</dd>
<dt>Returns:</dt>
<dd>true when all the methods including constructors are deterministic</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="hasField(java.lang.String)">
<h3>hasField</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">hasField</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;name)</span></div>
<div class="block">Verifies if the variable name is already in use.
Only the variables that are explicitly added to <code>fieldsByName</code> are
verified. The method verifies parent chain.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#hasField(java.lang.String)">hasField</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Parameters:</dt>
<dd><code>name</code> - name of the variable to test</dd>
<dt>Returns:</dt>
<dd>true if the name is used by one of static final fields</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="goDeeper()">
<h3>goDeeper</h3>
<div class="member-signature"><span class="modifiers">protected</span>&nbsp;<span class="return-type"><a href="DeterministicCodeOptimizer.html" title="class in org.apache.calcite.linq4j.tree">DeterministicCodeOptimizer</a></span>&nbsp;<span class="element-name">goDeeper</span>()</div>
<div class="block">Creates child visitor. It is used to traverse nested class declarations.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code><a href="ClassDeclarationFinder.html#goDeeper()">goDeeper</a></code>&nbsp;in class&nbsp;<code><a href="ClassDeclarationFinder.html" title="class in org.apache.calcite.linq4j.tree">ClassDeclarationFinder</a></code></dd>
<dt>Returns:</dt>
<dd>new Visitor that is used to optimize class declarations</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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