is-external=true" title="class or interface in java.lang" class="externalLink">IllegalStateException</a></code> - if the entity manager factory
 has been closed</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2.0</dd>
</dl>
</li>
</ul>
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<h4>isOpen</h4>
<pre class="methodSignature">boolean&nbsp;isOpen()</pre>
<div class="block">Indicates whether the factory is open. Returns true
 until the factory has been closed.</di