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Re: NullPointerException in MethodJoinPointGenerator
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created by <a href="http://community.jboss.org/people/spennec">Sebastien Pennec</a> in <i>JBoss AOP</i> - <a href="http://community.jboss.org/message/606496#606496">View the full discussion</a>
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<div class="jive-rendered-content"><p>Ok I went into the code of the MethodJoinPointGenerator: the MethodInfo that is used in the constructor returns a null "unadvisedMethod". In the MethodInfo constructor, there are two hashes passed as parameters: they usually are different values that return different methods from a "method catalog". It's the MethodHashing.findMethodByHash() that returns the method that corresponds to each hash.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>In my situation, the findMethodByHash returns null. So either the MethodHashing class populates its "methodHashesByClass" incorrectly and forgets a method, or the class that builds the hash sends in a nonexistent hash.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Does it help you help me? <span> :) </span> I really need to get this working... </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here is the code that I am talking about, from MethodInfo:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>   @SuppressWarnings("deprecation")</p><p>   public MethodInfo(Class<?> clazz, long hash, long unadvisedHash, Advisor advisor)</p><p>   {</p><p>      super(advisor, clazz);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>      try</p><p>      {</p><p>         this.hash = hash; </p><p>         advisedMethod = MethodHashing.findMethodByHash(clazz, hash);</p><p>         unadvisedMethod = MethodHashing.findMethodByHash(clazz, unadvisedHash);</p><p>         this.setAdvisor(advisor);</p><p>      }</p><p>      catch (Exception e)</p><p>      {</p><p>         throw new RuntimeException(e);</p><p>      }</p><p>   }</p></div>
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