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Re: How to add parameter annotation to new Method ?
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created by <a href="http://community.jboss.org/people/jesbo">jessiee white</a> in <i>Javassist</i> - <a href="http://community.jboss.org/message/639707#639707">View the full discussion</a>
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<div class="jive-rendered-content"><p>if you want to add annotion to argo,you have to add @parameter(name = "arg0") to the parameter.</p><p>   String addAnnotiontion(@Pparameter(name = "arg0")  String name,String card);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>use javassist to add annotion .the main train  like the below:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>  /**<br/>      * get constpool<br/>      */     <br/>     AttributeInfo paramAtrributeInfo = methodInfo.getAttribute(ParameterAnnotationsAttribute.visibleTag); // or inVisibleTag<br/>     ConstPool parameterConstPool = paramAtrributeInfo.getConstPool();</p><p>     /**<br/>      * param annotation<br/>      */<br/>     Annotation parameterAnnotation = new Annotation("annotation name", parameterConstPool);<br/>     ClassMemberValue parameterMemberValue = new ClassMemberValue("class full name", parameterConstPool);<br/>     parameterAnnotation.addMemberValue("value", parameterMemberValue);</p><p>     /**<br/>      * add annotation to dimensional array<br/>      */<br/>     ParameterAnnotationsAttribute parameterAtrribute = ((ParameterAnnotationsAttribute) paramAtrributeInfo);<br/>     Annotation[][] paramArrays = parameterAtrribute.getAnnotations();</p><p>     int orderNum = position.getOrderNumber();<br/>     Annotation[] addAnno = paramArrays[orderNum];<br/>     Annotation[] newAnno = null;<br/>     if (addAnno.length == 0) {<br/>      newAnno = new Annotation[1];<br/>     } else {<br/>      newAnno = Arrays.copyOf(addAnno, addAnno.length + 1);<br/>     }<br/>     newAnno[addAnno.length] = parameterAnnotation;</p><p>     paramArrays[orderNum] = newAnno;<br/>     parameterAtrribute.setAnnotations(paramArrays);</p><div class="mcePaste" id="_mcePaste" style="left: 0px; position: absolute; top: 0px;"></div></div>
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