ConstructorConverter

A new way to create a converter using the constructor instead the setters and specifying which nodes of the xml you want to use:

private static class Order {

private final String buyer;

protected Order(String buyer)

}

Converter orderConverter = ConstructorConverter.forType(Order.class)
.withConstructor(String.class)
.withAliases("buyer")
.build();

xStream.registerConverter(orderConverter);
Order order = (Order) xStream.fromXML(xml);

I am attaching the patch implementing that feature