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Help for java.lang.VerifyError when modify a method
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created by <a href="http://community.jboss.org/people/zhaoxwen">Eirc Zhao</a> in <i>Javassist</i> - <a href="http://community.jboss.org/message/640621#640621">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,all,</p><p>     I write a class named Bsafproxy which will change the method  of the org.jdesktop.application.ResourceMap in the basf-1.9.jar; I don't know why it can not work, who will do me a faver, give me some idears, thanks.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>     BTW, BsafProxy.java is my class, and the bsaf-1.9.jar is witch i wanna to modifed.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>package</b></font> org.eric.javassist;
 
<font color="navy"><b>import</b></font> javassist.CannotCompileException;
<font color="navy"><b>import</b></font> javassist.ClassPool;
<font color="navy"><b>import</b></font> javassist.CtClass;
<font color="navy"><b>import</b></font> javassist.CtMethod;
<font color="navy"><b>import</b></font> javassist.CtNewMethod;
<font color="navy"><b>import</b></font> javassist.Loader;
<font color="navy"><b>import</b></font> javassist.NotFoundException;
 
<font color="darkgreen">/**
* @author apple
*
*/</font>
<font color="navy"><b>public</b></font> <font color="navy"><b>class</b></font> BsafProxy <font color="navy">{</font>
 
  <font color="darkgreen">/**
           * @param args
           */</font>
          <font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>void</b></font> main(String[] args) <font color="navy">{</font>
                    <font color="navy"><b>try</b></font> <font color="navy">{</font>
                              ClassPool csPool = ClassPool.getDefault();
                              csPool.insertClassPath(<font color="red">"/Users/apple/Documents/Eric/work/eclipse/workspace/HelloMac/bsaf-1.9.jar"</font>);
                              CtClass demoClass = csPool.get(<font color="red">"org.jdesktop.application.ResourceMap"</font>);
 
                              CtMethod populateResourceMap = demoClass.getDeclaredMethod(<font color="red">"populateResourceMap"</font>);
                              demoClass.removeMethod(populateResourceMap);
 
                              CtMethod newPopulate = CtNewMethod.make(getContent(), demoClass);
                              demoClass.addMethod(newPopulate);
 
<font color="darkgreen">//                              URL clazz = csPool.find("org.jdesktop.application.ResourceMap");</font>
                              Loader loader = <font color="navy"><b>new</b></font> Loader(csPool);
  Class clazz = loader.loadClass(<font color="red">"org.jdesktop.application.ResourceMap"</font>);
                              clazz.newInstance();
                    <font color="navy">}</font> <font color="navy"><b>catch</b></font> (NotFoundException e) <font color="navy">{</font>
  <font color="darkgreen">// TODO Auto-generated catch block</font>
                              e.printStackTrace();
                    <font color="navy">}</font> <font color="navy"><b>catch</b></font> (CannotCompileException e) <font color="navy">{</font>
  <font color="darkgreen">// TODO Auto-generated catch block</font>
                              e.printStackTrace();
                    <font color="navy">}</font> <font color="navy"><b>catch</b></font> (ClassNotFoundException e) <font color="navy">{</font>
  <font color="darkgreen">// TODO Auto-generated catch block</font>
                              e.printStackTrace();
                    <font color="navy">}</font> <font color="navy"><b>catch</b></font> (InstantiationException e) <font color="navy">{</font>
  <font color="darkgreen">// TODO Auto-generated catch block</font>
                              e.printStackTrace();
                    <font color="navy">}</font> <font color="navy"><b>catch</b></font> (IllegalAccessException e) <font color="navy">{</font>
  <font color="darkgreen">// TODO Auto-generated catch block</font>
                              e.printStackTrace();
                    <font color="navy">}</font>
          <font color="navy">}</font>
 
          <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> String getContent() <font color="navy">{</font>
<font color="darkgreen">//                    private void populateResourceMap(String bundleName, Map<String, Object> bundlesMap) {</font>
<font color="darkgreen">//                  try {</font>
<font color="darkgreen">//                      ResourceBundle bundle = ResourceBundle.getBundle(bundleName, locale, classLoader);</font>
<font color="darkgreen">//                      Enumeration<String> keys = bundle.getKeys();</font>
<font color="darkgreen">//                      while (keys.hasMoreElements()) {</font>
<font color="darkgreen">//                          String key = keys.nextElement();</font>
<font color="darkgreen">//                          bundlesMap.put(key, bundle.getObject(key));</font>
<font color="darkgreen">//                      }</font>
<font color="darkgreen">//                  } catch (MissingResourceException ignore) {</font>
<font color="darkgreen">//                      /* bundleName is just a location to check, it's not</font>
<font color="darkgreen">//                       * guaranteed to name a ResourceBundle</font>
<font color="darkgreen">//                       */</font>
<font color="darkgreen">//                  }</font>
<font color="darkgreen">//              }</font>
                    StringBuffer content = <font color="navy"><b>new</b></font> StringBuffer();
                    content.append(<font color="red">"private void populateResourceMap(String bundleName, java.util.Map bundlesMap) {"</font>);
                    content.append(<font color="red">"try {"</font>);
                    content.append(<font color="red">"          java.util.ResourceBundle bundle = java.util.ResourceBundle.getBundle($1, locale, classLoader);"</font>);
                    content.append(<font color="red">"          java.util.Enumeration keys = bundle.getKeys();"</font>);
                    content.append(<font color="red">"          while (keys.hasMoreElements()) {"</font>);
                    content.append(<font color="red">"                    String key = keys.nextElement();"</font>);
                    content.append(<font color="red">"                    $2.put(key, bundle.getObject(key));"</font>);
                    content.append(<font color="red">"          }"</font>);
                    content.append(<font color="red">"} catch (java.util.MissingResourceException ignore) { }"</font>);
                    content.append(<font color="red">"}"</font>);
                    <font color="navy"><b>return</b></font> content.toString();
          <font color="navy">}</font>
 
<font color="navy">}</font>
 
ouput:
 
Exception in thread <font color="red">"main"</font> java.lang.VerifyError: (<font color="navy"><b>class</b></font>: org/jdesktop/application/ResourceMap, method: populateResourceMap signature: (Ljava/lang/String;Ljava/util/Map;)V) Incompatible argument to function
          at java.lang.Class.getDeclaredConstructors0(Native Method)
          at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
          at java.lang.Class.getConstructor0(Class.java:2699)
          at java.lang.Class.newInstance0(Class.java:326)
          at java.lang.Class.newInstance(Class.java:308)
          at org.eric.javassist.BsafProxy.main(BsafProxy.java:38)
 
</code></pre></div>
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