Existing Javabe support for changing immutable subtasks

Question

Does anyone know any existing support for modifying the individual properties of immutable objects stored in a JavaBean-compatible object?

For a trivial example:

For a given immutable value class and bean object (without worrying about listeners for this):

public class ValueObject {
    private final int value;

    public ValueObject(int value) {
        this.value = value;
    }

    public ValueObject withValue(int newValue) {
        return new ValueObject(value);
    }
}

public class Bean {

    private ValueObject value;

    public ValueObject getValue() {
        return value;
    }

    public ValueObject setValue(ValueObject value) {
        this.value = value;
    }
}

You can already view the property as bean.value.value.

I am looking to see if there is an existing way of saying bean.value.value = 3and basically has a call equivalent bean.setValue(bean.getValue().withValue(3));.

Note that the actual value object is much more complex.

Thank!

Answer 1

BeanInfo bean, setWriteMethod. int .