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Posted to issues@commons.apache.org by "Mark Thomas (JIRA)" <ji...@apache.org> on 2015/03/07 20:44:38 UTC
[jira] [Resolved] (BCEL-129) ClassFormatException when
instrumenting a Java 5 class
[ https://issues.apache.org/jira/browse/BCEL-129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Thomas resolved BCEL-129.
------------------------------
Resolution: Fixed
No resposnse to request to re-test against trunk and no test case provided to enable someone else to test it.
I am therefore going to assume that this was fixed long ago. If that isn;t the case and you still see this issue on trunk, please feel free to re-open and provide a test case.
> ClassFormatException when instrumenting a Java 5 class
> ------------------------------------------------------
>
> Key: BCEL-129
> URL: https://issues.apache.org/jira/browse/BCEL-129
> Project: Commons BCEL
> Issue Type: Bug
> Components: Main
> Affects Versions: unspecified
> Reporter: psramkumar
> Assignee: Apache Commons Developers
>
> Hi ,
> I am using BCEL to instrument Java classes of web applications in JDK1.6 ,1.5 .We encountered a 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 the application I get a ClassFormatException.
> Example code in which I delete attribute "LocalvariableTypeTable" jc is JavaClass Object
> {code}
> 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);
> }
> }
> {code}
> Also I get other error
> {code}
> Caused by: java.lang.ClassFormatError: LVTT entry for 'patterns' in class file org/springframework/classname does not match any LVT entry
> {code}
> and the application fails to load
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