I found another approach that works. The basic problem is that you want to have a list as your input payload for your service, but javax.validation won’t validate a list, only a JavaBean. The trick is to use a custom list class that functions as both a List and a JavaBean:
@RequestBody @Valid List<CompanyTag> categories
Change to:
@RequestBody @Valid ValidList<CompanyTag> categories
Your list subclass would look something like this:
public class ValidList<E> implements List<E> {
@Valid
private List<E> list;
public ValidList() {
this.list = new ArrayList<E>();
}
public ValidList(List<E> list) {
this.list = list;
}
// Bean-like methods, used by javax.validation but ignored by JSON parsing
public List<E> getList() {
return list;
}
public void setList(List<E> list) {
this.list = list;
}
// List-like methods, used by JSON parsing but ignored by javax.validation
@Override
public int size() {
return list.size();
}
@Override
public boolean isEmpty() {
return list.isEmpty();
}
// Other list methods ...
}