public Class getObjectClass() {
	if (_wrapperObject instanceof Boolean)
	    return boolean.class;
	else if (_wrapperObject instanceof Integer)
	    return int.class;
	else if (_wrapperObject instanceof Float)
	    return float.class;
	else if (_wrapperObject instanceof Double)
	    return double.class;
	else if (_wrapperObject instanceof Long)
	    return long.class;
	else if (_wrapperObject instanceof Character)
	    return char.class;
	else if (_wrapperObject instanceof Byte)
	    return byte.class;
	else if (_wrapperObject instanceof Short)
	    return short.class;
	else
	    return null;
    }