Spring Partial Update Object Data Binding

Question

We are trying to implement a special partial update function in Spring 3.2. We are using Spring for the backend and have a simple Javascript frontend. I\'ve not been able to

Answer 1

I've done this with a java Map and some reflection magic:

public static Entidade setFieldsByMap(Map dados, Entidade entidade) {
        dados.entrySet().stream().
                filter(e -> e.getValue() != null).
                forEach(e -> {
                    try {
                        Method setter = entidade.getClass().
                                getMethod("set"+ Strings.capitalize(e.getKey()),
                                        Class.forName(e.getValue().getClass().getTypeName()));
                        setter.invoke(entidade, e.getValue());
                    } catch (Exception ex) { // a lot of exceptions
                        throw new WebServiceRuntimeException("ws.reflection.error", ex);
                    }
                });
        return entidade;
    }

And the entry point:

    @Transactional
    @PatchMapping("/{id}")
    public ResponseEntity partialUpdate(@PathVariable String entity,
            @PathVariable Long id, @RequestBody Map data) {
        // ...
        return new ResponseEntity<>(obj, HttpStatus.OK);
    }