Benutzerdefiniertes Array-Binding mit generischem StringToCollectionConverter

@Component
public class DelimitedIntegerArrayConverter implements Converter<String, Integer[]> {
 
    @Override
    public Integer[] convert(String source) {
        if (source == null || source.isBlank()) {
            return new Integer[0];
        }
        return Arrays.stream(source.split(";"))
            .map(String::trim)
            .filter(Predicate.not(String::isEmpty))
            .map(Integer::valueOf)
            .toArray(Integer[]::new);
    }
}
 
@RestController
@RequestMapping("/api/metrics")
public class MetricsController {
 
    @GetMapping
    public ResponseEntity<Integer> sumMetricIds(@RequestParam("ids") Integer[] metricIds) {
        int total = Arrays.stream(metricIds).mapToInt(Integer::intValue).sum();
        return ResponseEntity.ok(total);
    }
}