How to send ListT with KvmSerializable?

I'm implementing KvmSerializable for communication with webservice with complex types.

I have a List property. But I'm indicating the type List.class and that list is not getting there in the webservice.

What am I doing wrong?

public class CadastrosImpGarIn implements KvmSerializable {

public int codCli;
public int codEmp;
public int codFil;
public int codMot;
public String datCol;
public String flowInstanceID;
public String flowName;
public String numDoc;
public List<CadastrosImpGarInTabBat> tabBat;

@Override
public Object getProperty(int index) {
    switch (index) {
    case 0:
        return codCli;
    case 1:
        return codEmp;
    case 2:
        return codFil;
    case 3:
        return codMot;
    case 4:
        return datCol;
    case 5:
        return flowInstanceID;
    case 6:
        return flowName;
    case 7:
        return numDoc;
    case 8:
        return tabBat;
    default:
        return null;
    }
}

@Override
public int getPropertyCount() {
    return 8;
}

@SuppressWarnings("rawtypes")
@Override
public void getPropertyInfo(int index, Hashtable hash, PropertyInfo info) {
    switch (index) {
    case 0:
        info.type = PropertyInfo.INTEGER_CLASS;
        info.name = "codCli";
        break;
    case 1:
        info.type = PropertyInfo.INTEGER_CLASS;
        info.name = "codEmp";
        break;          
    case 2:
        info.type = PropertyInfo.INTEGER_CLASS;
        info.name = "codFil";
        break;
    case 3:
        info.type = PropertyInfo.INTEGER_CLASS;
        info.name = "codMot";
        break;
    case 4:
        info.type = PropertyInfo.STRING_CLASS;
        info.name = "datCol";
        break;
    case 5:
        info.type = PropertyInfo.STRING_CLASS;
        info.name = "flowInstanceID";
        break;
    case 6:
        info.type = PropertyInfo.STRING_CLASS;
        info.name = "flowName";
        break;
    case 7:
        info.type = PropertyInfo.STRING_CLASS;
        info.name = "numDoc";
        break;
    case 8:
        info.type = List.class;
        info.name = "tabBat";
        break;
    default:
        break;
    }
}

@SuppressWarnings("unchecked")
@Override
public void setProperty(int index, Object value) {
    switch (index) {
    case 0:
        codCli = Integer.parseInt(value.toString());
        break;
    case 1:
        codEmp = Integer.parseInt(value.toString());
        break;
    case 2:
        codFil = Integer.parseInt(value.toString());
        break;
    case 3:
        codMot = Integer.parseInt(value.toString());
        break;
    case 4:
        datCol = value.toString();
        break;
    case 5:
        flowInstanceID = value.toString();
        break;
    case 6:
        flowName = value.toString();
        break;
    case 7:
        numDoc = value.toString();
        break;
    //TODO List?        
    case 8:
        tabBat = (List<CadastrosImpGarInTabBat>) value;
        break;
    default:
        break;
    }
}

}