">IllegalStateException</a></code> - if an attempt is made to call this method after all
                               <code>ServletContextListener</code>s have had their <code>contextInitialized</code>
                               methods invoked.</dd></dl>
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<h4>getExpressionFactory</h4>
<pre>javax.el.ExpressionFactory&nbsp;getExpressionFactory()</pre>
<div class="block">Returns a factory used to c