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<h2 title="Interface EJBQLExpression" class="title">Interface EJBQLExpression</h2>
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<dt>All Known Subinterfaces:</dt>
<dd><a href="../../../../org/apache/cayenne/ejbql/parser/Node.html" title="interface in org.apache.cayenne.ejbql.parser">Node</a></dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../org/apache/cayenne/ejbql/parser/AggregateConditionNode.html" title="class in org.apache.cayenne.ejbql.parser">AggregateConditionNode</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAbs.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAbs</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAbstractSchemaName.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAbstractSchemaName</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAdd.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAdd</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAggregate.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAggregate</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAggregateColumn.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAggregateColumn</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAll.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAll</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAnd.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAnd</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAny.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAny</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAscending.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAscending</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLAverage.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLAverage</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLBetween.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLBetween</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLBooleanLiteral.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLBooleanLiteral</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLClassName.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLClassName</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLConcat.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLConcat</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLConstructor.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLConstructor</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLConstructorParameter.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLConstructorParameter</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLConstructorParameters.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLConstructorParameters</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLCount.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLCount</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLCurrentDate.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLCurrentDate</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLCurrentTime.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLCurrentTime</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLCurrentTimestamp.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLCurrentTimestamp</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDbPath.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDbPath</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDecimalLiteral.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDecimalLiteral</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDelete.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDelete</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDescending.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDescending</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDistinct.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDistinct</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLDivide.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLDivide</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLEquals.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLEquals</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLEscapeCharacter.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLEscapeCharacter</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLExists.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLExists</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLFrom.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLFrom</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLFromItem.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLFromItem</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLGreaterOrEqual.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLGreaterOrEqual</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLGreaterThan.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLGreaterThan</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLGroupBy.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLGroupBy</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLHaving.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLHaving</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIdentificationVariable.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIdentificationVariable</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIdentifier.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIdentifier</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIn.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIn</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLInnerFetchJoin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLInnerFetchJoin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLInnerJoin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLInnerJoin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIntegerLiteral.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIntegerLiteral</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIsEmpty.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIsEmpty</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLIsNull.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLIsNull</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLJoin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLJoin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLength.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLength</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLessOrEqual.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLessOrEqual</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLessThan.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLessThan</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLike.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLike</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLocate.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLocate</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLLower.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLLower</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLMax.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLMax</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLMemberOf.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLMemberOf</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLMin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLMin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLMod.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLMod</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLMultiply.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLMultiply</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLNamedInputParameter.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLNamedInputParameter</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLNegative.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLNegative</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLNot.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLNot</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLNotEquals.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLNotEquals</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLOr.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLOr</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLOrderBy.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLOrderBy</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLOrderByItem.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLOrderByItem</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLOuterFetchJoin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLOuterFetchJoin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLOuterJoin.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLOuterJoin</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLPath.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLPath</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLPatternValue.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLPatternValue</a>, <a 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org.apache.cayenne.ejbql.parser">EJBQLTrim</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLTrimBoth.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLTrimBoth</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLTrimCharacter.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLTrimCharacter</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLTrimLeading.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLTrimLeading</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLTrimSpecification.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLTrimSpecification</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLTrimTrailing.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLTrimTrailing</a>, <a href="../../../../org/apache/cayenne/ejbql/parser/EJBQLUpdate.html" title="class in org.apache.cayenne.ejbql.parser">EJBQLUpdate</a>, <a 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<pre>public interface <span class="typeNameLabel">EJBQLExpression</span></pre>
<div class="block">An abstract EJBQL expression interface.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>3.0</dd>
</dl>
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<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html" title="interface in org.apache.cayenne.ejbql">EJBQLExpression</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html#getChild-int-">getChild</a></span>(int&nbsp;index)</code>
<div class="block">Returns a child expression node at the specified index.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html#getChildrenCount--">getChildrenCount</a></span>()</code>
<div class="block">Returns a number of child operands of this expression node.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html#getText--">getText</a></span>()</code>
<div class="block">Returns a text property of the node.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html#isNegated--">isNegated</a></span>()</code>
<div class="block">Returns an optional boolean flag that negates the value of the expression.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html#visit-org.apache.cayenne.ejbql.EJBQLExpressionVisitor-">visit</a></span>(<a href="../../../../org/apache/cayenne/ejbql/EJBQLExpressionVisitor.html" title="interface in org.apache.cayenne.ejbql">EJBQLExpressionVisitor</a>&nbsp;visitor)</code>
<div class="block">Accepts a visitor, calling appropriate visitor method.</div>
</td>
</tr>
</table>
</li>
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<h3>Method Detail</h3>
<a name="visit-org.apache.cayenne.ejbql.EJBQLExpressionVisitor-">
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<ul class="blockList">
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<h4>visit</h4>
<pre>void&nbsp;visit(<a href="../../../../org/apache/cayenne/ejbql/EJBQLExpressionVisitor.html" title="interface in org.apache.cayenne.ejbql">EJBQLExpressionVisitor</a>&nbsp;visitor)</pre>
<div class="block">Accepts a visitor, calling appropriate visitor method. If the visitor method
returns true, visits all children, otherwise stops.</div>
</li>
</ul>
<a name="getChildrenCount--">
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<h4>getChildrenCount</h4>
<pre>int&nbsp;getChildrenCount()</pre>
<div class="block">Returns a number of child operands of this expression node.</div>
</li>
</ul>
<a name="getChild-int-">
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<ul class="blockList">
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<h4>getChild</h4>
<pre><a href="../../../../org/apache/cayenne/ejbql/EJBQLExpression.html" title="interface in org.apache.cayenne.ejbql">EJBQLExpression</a>&nbsp;getChild(int&nbsp;index)</pre>
<div class="block">Returns a child expression node at the specified index.</div>
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<pre><a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;getText()</pre>
<div class="block">Returns a text property of the node.</div>
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<pre>boolean&nbsp;isNegated()</pre>
<div class="block">Returns an optional boolean flag that negates the value of the expression.</div>
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