<html> <head> <title>Interface XUnloadingPreference</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="../../../../idl.css"> </head> <body> <div id="adc-idlref"> <a name="_top_"> </a><table class="navimain" border="0" cellpadding="3"> <tr> <td class="navimain"><a href="../module-ix.html" class="navimain">Overview</a></td> <td class="navimain"><a href="module-ix.html" class="navimain">Module</a></td> <td class="navimain"><a href="XUnloadingPreference-xref.html" class="navimain">Use</a></td> <td class="navimainnone">Devguide</td> <td class="navimain"><a href="../../../../index-files/index-1.html" class="navimain">Index</a></td> </tr> </table> <table class="navisub" border="0" cellpadding="0"> <tr> <td class="navisub"><a href="#MethodsSummary" class="navisub">Methods' Summary</a></td> <td class="navisub">Attributes' Summary</td> <td class="navisub"><a href="#MethodsDetails" class="navisub">Methods' Details</a></td> <td class="navisub">Attributes' Details</td> </tr> </table> <hr> <table border="0" width="100%" cellpadding="5" cellspacing="3" class="title-table" style="margin-bottom:6pt;"> <tr> <td><p class="namechain"><a href="../../../../module-ix.html" class="namechain">::</a> <a href="../../../module-ix.html" class="namechain">com</a> :: <a href="../../module-ix.html" class="namechain">sun</a> :: <a href="../module-ix.html" class="namechain">star</a> :: <a href="module-ix.html" class="namechain">uno</a> :: </p> </td> </tr> <tr> <td class="title">interface XUnloadingPreference</td> </tr> <tr> <td/></tr> <tr> <td><dl> <dt><b>Description</b></dt> <dd>Components can implement <code>XUnloadingPreference</code> in order to indicate how they should be treated when their hosting library is to be unloaded. When someone calls <code>rtl_unloadUnusedModules</code> then the unloading listeners are notified by calling previously registered callback functions. A listener is an entity that employs, registers, and unregisters the callback functions on its behalf. Upon notification (the callback function is being called) a listener may release references to UNO components. Thus, the loaded libraries can be unloaded, if no one else keeps any objects from the library alive. <br> Before a listener releases references, it should ask for this interface. If the interface is not implemented, then the listener may release the object; otherwise, it calls <code>releaseOnNotification</code>. If the function returns false then the listener should keep the reference, otherwise it may release it. </dd> </dl> </td> </tr> </table> <hr> <a name="MethodsSummary"/><table border="1" width="100%" cellpadding="5" cellspacing="0" class="subtitle"> <tr> <td class="subtitle" colspan="2">Methods' Summary</td> </tr> <tr> <td class="imsum_left"><a href="#releaseOnNotification">releaseOnNotification</a></td> <td class="imsum_right">The return value determines if the object wants to stay alive in case of an unloading procedure. </td> </tr> </table> <a name="MethodsDetails"/><table border="1" width="100%" cellpadding="5" cellspacing="0" class="subtitle"> <tr> <td class="subtitle">Methods' Details</td> </tr> <tr> <td class="imdetail"><a name="releaseOnNotification" class="membertitle">releaseOnNotification</a><table border="0" width="96%" cellpadding="5" cellspacing="0" class="table-in-method" bgcolor="#ffffff" align="center"> <tr> <td><table class="table-in-method" border="0"> <tr> <td valign="top" colspan="3">boolean</td> </tr> <tr> <td valign="top"><b>releaseOnNotification</b>();</td> </tr> </table> <hr> <dl> <dt><b>Description</b></dt> <dd>The return value determines if the object wants to stay alive in case of an unloading procedure. </dd> <dt><b>Returns</b></dt> <dd><b>false</b>do not release references to this object,otherwise <b>true</b> </dd> </dl> </td> </tr> </table> </td> </tr> </table> <a href="#_top_">Top of Page</a><hr size="3"><p class="copyright" align="center">Copyright © 2000, 2012 LibreOffice contributors and/or their affiliates. 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