<style>
/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
#email-body { min-width: 30em !important; }
#email-page { padding: 8px !important; }
#email-banner { padding: 8px 8px 0 8px !important; }
#email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
#email-fields { padding: 0 8px 8px 8px !important; }
#email-gutter { width: 0 !important; }
}
</style>
<div id="email-body">
<table id="email-wrap" align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#f0f0f0;color:#000000;width:100%;">
<tr valign="top">
<td id="email-page" style="padding:16px !important;">
<table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#ffffff;border:1px solid #bbbbbb;color:#000000;width:100%;">
<tr valign="top">
<td bgcolor="#3b4d64" style="background-color:#3b4d64;color:#ffffff;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="https://issues.jboss.org/s/en_USg4ey12-418945332/852/58/_/jira-logo-scaled.png" alt="" style="vertical-align:top;" /></td>
</tr><tr valign="top">
<td id="email-banner" style="padding:32px 32px 0 32px;">
<table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="width:100%;">
<tr valign="top">
<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;padding:0;">
<img id="email-avatar" src="https://community.jboss.org/people/luksa/avatar/16.png" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
<div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
<a class="user-hover" rel="luksa" id="email_luksa" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=luksa" style="color:#326ca6;">Marko Lukša</a>
commented on <img src="https://issues.jboss.org/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#326ca6;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1498'>WELD-1498</a>
</div>
<div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
<a style='color:#326ca6;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1498'><strong>ClassCastException when proxied class return this</strong></a>
</div>
</td>
</tr>
</table>
</td>
</tr>
<tr valign="top">
<td id="email-fields" style="padding:0 32px 32px 32px;">
<table border="0" cellpadding="0" cellspacing="0" style="padding:0;text-align:left;width:100%;" width="100%">
<tr valign="top">
<td id="email-gutter" style="width:64px;white-space:nowrap;"></td>
<td>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr valign="top">
<td colspan="2" style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 16px 0;width:100%;">
<div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;"><p>A little more background on this issue:</p>
<p>the actual type of the instance is <tt>AdvancedCache</tt>, not <tt>Cache</tt>. The method <tt>Cache.getAdvancedCache()</tt> looks like this:</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java"><span class="code-keyword">public</span> AdvancedCache getAdvancedCache() {
<span class="code-keyword">return</span> <span class="code-keyword">this</span>;
}
</pre>
</div></div>
<p>When a method of the proxied instance returns the proxied instance (i.e. <tt>return this</tt>), the Weld proxy's method handler replaces the returned value with the proxy, to prevent the bean instance from escaping. </p>
<p>Since the producer's return type is <tt>Cache</tt>, the proxy only implements <tt>Cache</tt>. It does not implement <tt>AdvancedCache</tt>. When <tt>getAdvancedCache()</tt> tries to return <tt>this</tt>, the method handler tries to return the proxy, which obviously results in a CCE.</p>
<p>Not sure what we can do about it in Weld. The example can work around this problem by either changing the producer to be @Dependent scoped, or by changing the producer's return type to <tt>AdvancedCache</tt>.</p>
<p>We could maybe change Weld's method handler to check if the proxy instance it tries to return is assignable to the method's return type. If it isn't, we could return the original instance instead of the proxy. </p></div>
<div style="color:#505050;padding:4px 0 0 0;"> </div>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td><!-- End #email-page -->
</tr>
<tr valign="top">
<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:10px;line-height:14px;padding: 0 16px 16px 16px;text-align:center;">
This message is automatically generated by JIRA.<br />
If you think it was sent incorrectly, please contact your JIRA administrators<br />
For more information on JIRA, see: <a style='color:#326ca6;' href='http://www.atlassian.com/software/jira'>http://www.atlassian.com/software/jira</a>
</td>
</tr>
</table><!-- End #email-wrap -->
</div><!-- End #email-body -->