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List:       bcel-user
Subject:    AW: VerifyError after modifing a Class
From:       "Pasch, Thomas (ACTGRO)" <extern.thomas.pasch () volkswagen ! de>
Date:       2002-06-13 7:27:06
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Dear Markus,

thank you for support. The error though, is still there. It 
seem to depend on whether there are (more) methods
after the (static) main.

I attached a class to test the problem with.

Kind regards,

Thomas

/*
 * BcelVerifyError.java
 */

import org.apache.bcel.*;
import org.apache.bcel.classfile.*;
import org.apache.bcel.generic.*;
import org.apache.bcel.util.*;

public class BcelVerifyError {

    private Object trash2;
    
    private BcelVerifyError(int dummy) {
    }
    
    private int getDummy() {
        return 1;
    }
    
    public Object setDummy(Object o) {
        return o;
    }
    
    public static void main(String args[]) throws Exception {
        // read in Class
        Class clazz = Class.forName("BcelVerifyError");
        String name = clazz.getName();
        JavaClass jclass = Repository.lookupClass(name);
        // prepare modification
        ClassGen classGen = new ClassGen(jclass);
        ConstantPoolGen poolGen = classGen.getConstantPool();
        InstructionFactory instr = new InstructionFactory(classGen,
poolGen);
        // modify
        classGen.addEmptyConstructor(Constants.ACC_PUBLIC);
        classGen.setClassName("Modified");
        // dump modified Class
        JavaClass modifiedClass = classGen.getJavaClass();
        modifiedClass.dump("D:/dl80pas/java.projects/try/Modified.class");
        // read in modified Class
        Class modClass = Class.forName("Modified");
        // list methods
        java.lang.reflect.Method[] methods;
        methods = modClass.getDeclaredMethods();
        java.lang.reflect.Method method;
        for (int i = 0; i < methods.length; ++i) {
            method = methods[i];
            System.out.println("method: " + method.getName());
        } 
    }

    /**
     * Without this two methods the Class will be all right...
     */

    public void setObject(Object trash) {
        trash2 = trash;
    }
    
    public Object getObject() {
        return trash2;
    }   
    
}



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