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List:       bcel-dev
Subject:    DO NOT REPLY [Bug 46722] New: problem using bcel in jdk15
From:       bugzilla () apache ! org
Date:       2009-02-17 17:22:51
Message-ID: bug-46722-8203 () https ! issues ! apache ! org/bugzilla/
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https://issues.apache.org/bugzilla/show_bug.cgi?id=46722

           Summary: problem using bcel in jdk15
           Product: BCEL
           Version: unspecified
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Main
        AssignedTo: bcel-dev@jakarta.apache.org
        ReportedBy: psramkumar@adventnet.com


Hi ,
I am using Bcel to instrument java classes  of webapplications in JDK1.6 ,1.5
.We encountered ClassFormat exception for classes using Generics
which prevented application from loading.From
https://issues.apache.org/bugzilla/show_bug.cgi?id=33549
I saw a workaround to delete "LocalVariableTypeTable".I followed that
suggestion and loop through the attributes
and deleted attribute named "LocalVariableTypeTable".Still While loading
application I get ClassFormatException.
Example code in which i delete attribute "LocalvariableTypeTable" jc is
JavaClass Object
             Method[] ma = jc.getMethods();
           for(int i=0,x=ma.length;i<x;i++)
            {
            try{

                MethodGen mg = new
MethodGen(ma[i],cg.getClassName(),cg.getConstantPool());
                Attribute[] atts = mg.getCodeAttributes();

                for( int j=0; j<atts.length; j++ ) {

                   
if(atts[j].getNameIndex()==mg.getConstantPool().lookupUtf8("LocalVariableTypeTable"))
                    {

                        mg.removeCodeAttribute(atts[j]);

                    }

                }

            }

                  catch(Exception o1)
                  {
                  output.write("exception "+o1);   
                  }
                }

       Also i get other error

       Caused by: java.lang.ClassFormatError: LVTT entry for 'patterns' in
class file org/springframework/classname does not match any LVT entry
and application fails to load


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