public class TestDAO {

    public TestDAO() {
    }

    @Transactional(type=TxType.REQUIRED)
    public void transactional() {
        // bla
    }
}

The problem:

We couldn't instantiate a new instance of it after it was enhanced, "new TestDAO();" would fail on an IllegalArgumentException. We fixed the problem in ScopeTransAdapter.setTxType(Object TxType). We changed it from:

private void setTxType(Object txType){
       
        mv.visitVarInsn(ALOAD, posTxScope);
        mv.visitLdcInsn(txType.toString());
        mv.visitMethodInsn(INVOKESTATIC, C_TXTYPE, "valueOf", "(Ljava/lang/String;)L"+C_TXTYPE+";");
        mv.visitMethodInsn(INVOKEVIRTUAL, C_TXSCOPE, "setType", "(L"+C_TXSCOPE+";)L"+C_TXSCOPE+";");
        mv.visitInsn(POP);
    }

Into:

private void setTxType(Object txType){
       
        mv.visitVarInsn(ALOAD, posTxScope);
        mv.visitLdcInsn(txType.toString());
        mv.visitMethodInsn(INVOKESTATIC, C_TXTYPE, "valueOf", "(Ljava/lang/String;)L"+C_TXTYPE+";");
        mv.visitMethodInsn(INVOKEVIRTUAL, C_TXSCOPE, "setType", "(L"+C_TXTYPE+";)L"+C_TXSCOPE+";");
        mv.visitInsn(POP);
    }