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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.linq4j.tree</a></div>
<h2 title="Class ExpressionWriter" class="title">Class ExpressionWriter</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.calcite.linq4j.tree.ExpressionWriter</li>
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<pre>class <span class="typeNameLabel">ExpressionWriter</span>
extends java.lang.Object</pre>
<div class="block">Converts an expression to Java code.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private java.lang.StringBuilder</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#buf">buf</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#generics">generics</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private static int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#INDENT">INDENT</a></span></code></th>
<td class="colLast">
<div class="block">How many spaces to indent Java code.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#indentPending">indentPending</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private org.apache.calcite.avatica.util.Spacer</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#spacer">spacer</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">ExpressionWriter</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(boolean)">ExpressionWriter</a></span>&#8203;(boolean&nbsp;generics)</code></th>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#append(char)">append</a></span>&#8203;(char&nbsp;c)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#append(java.lang.Object)">append</a></span>&#8203;(java.lang.Object&nbsp;o)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#append(java.lang.reflect.Type)">append</a></span>&#8203;(java.lang.reflect.Type&nbsp;type)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#append(java.lang.String)">append</a></span>&#8203;(java.lang.String&nbsp;s)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#append(org.apache.calcite.linq4j.tree.AbstractNode)">append</a></span>&#8203;(<a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a>&nbsp;o)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#backUp()">backUp</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#begin()">begin</a></span>()</code></th>
<td class="colLast">
<div class="block">Increases the indentation level.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#begin(java.lang.String)">begin</a></span>&#8203;(java.lang.String&nbsp;s)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>private void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#checkIndent()">checkIndent</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#end()">end</a></span>()</code></th>
<td class="colLast">
<div class="block">Decreases the indentation level.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#end(java.lang.String)">end</a></span>&#8203;(java.lang.String&nbsp;s)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>java.lang.StringBuilder</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBuf()">getBuf</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#indent()">indent</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#list(java.lang.String,java.lang.String,java.lang.String,java.lang.Iterable)">list</a></span>&#8203;(java.lang.String&nbsp;begin,
java.lang.String&nbsp;sep,
java.lang.String&nbsp;end,
java.lang.Iterable&lt;?&gt;&nbsp;list)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newlineAndIndent()">newlineAndIndent</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#requireParentheses(org.apache.calcite.linq4j.tree.Expression,int,int)">requireParentheses</a></span>&#8203;(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression,
int&nbsp;lprec,
int&nbsp;rprec)</code></th>
<td class="colLast">
<div class="block">If parentheses are required, writes this expression out with
parentheses and returns true.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#write(org.apache.calcite.linq4j.tree.Node)">write</a></span>&#8203;(<a href="Node.html" title="interface in org.apache.calcite.linq4j.tree">Node</a>&nbsp;expression)</code></th>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h3>Field Detail</h3>
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<h4>INDENT</h4>
<pre>private static final&nbsp;int INDENT</pre>
<div class="block">How many spaces to indent Java code.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../constant-values.html#org.apache.calcite.linq4j.tree.ExpressionWriter.INDENT">Constant Field Values</a></dd>
</dl>
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<pre>private final&nbsp;org.apache.calcite.avatica.util.Spacer spacer</pre>
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<h4>buf</h4>
<pre>private final&nbsp;java.lang.StringBuilder buf</pre>
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<pre>private&nbsp;boolean indentPending</pre>
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<pre>private final&nbsp;boolean generics</pre>
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<pre>ExpressionWriter()</pre>
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<pre>ExpressionWriter&#8203;(boolean&nbsp;generics)</pre>
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<a id="write(org.apache.calcite.linq4j.tree.Node)">
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<h4>write</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;write&#8203;(<a href="Node.html" title="interface in org.apache.calcite.linq4j.tree">Node</a>&nbsp;expression)</pre>
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<h4>toString</h4>
<pre class="methodSignature">public&nbsp;java.lang.String&nbsp;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>toString</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
</dl>
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<a id="requireParentheses(org.apache.calcite.linq4j.tree.Expression,int,int)">
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<h4>requireParentheses</h4>
<pre class="methodSignature">public&nbsp;boolean&nbsp;requireParentheses&#8203;(<a href="Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a>&nbsp;expression,
int&nbsp;lprec,
int&nbsp;rprec)</pre>
<div class="block">If parentheses are required, writes this expression out with
parentheses and returns true. If they are not required, does nothing
and returns false.</div>
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<h4>begin</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;begin()</pre>
<div class="block">Increases the indentation level.</div>
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<h4>end</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;end()</pre>
<div class="block">Decreases the indentation level.</div>
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<a id="newlineAndIndent()">
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<h4>newlineAndIndent</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;newlineAndIndent()</pre>
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<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;indent()</pre>
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<h4>begin</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;begin&#8203;(java.lang.String&nbsp;s)</pre>
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<h4>end</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;end&#8203;(java.lang.String&nbsp;s)</pre>
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<h4>append</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;append&#8203;(char&nbsp;c)</pre>
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<h4>append</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;append&#8203;(java.lang.reflect.Type&nbsp;type)</pre>
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<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;append&#8203;(<a href="AbstractNode.html" title="class in org.apache.calcite.linq4j.tree">AbstractNode</a>&nbsp;o)</pre>
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<h4>append</h4>
<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;append&#8203;(java.lang.Object&nbsp;o)</pre>
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<pre class="methodSignature">public&nbsp;<a href="ExpressionWriter.html" title="class in org.apache.calcite.linq4j.tree">ExpressionWriter</a>&nbsp;append&#8203;(java.lang.String&nbsp;s)</pre>
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