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Spring validator: Validating a list of nested objects

Just a code snippet on validating nested objects in java using Spring.

class MyForm() {
    String myName;
    List<TypeA> listObjects;
}
class TypeA() {
    String number;
    String value;
}

public class MyFormValidator implements Validator {

    private TypeAValidator typeAValidator;

    @Override
    public boolean supports(Class clazz) {
        return MyForm.class.equals(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {
        MyForm myForm = (MyForm) target;
        typeAValidator = new TypeAValidator();

        int idx = 0;
        for (TypeA item : myForm.getListObjects()) {

            errors.pushNestedPath("listObjects[" + idx + "]");
            ValidationUtils.invokeValidator(this.typeAValidator, item, errors);
            errors.popNestedPath();
            idx++;

            ...
        }

        ...
    }
}

public class TypeAValidator implements Validator{

    @Override
    public boolean supports(Class<?> clazz) {
        return TypeA.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object target, Errors errors) {
        TypeA objTypeA = (TypeA)target;

        ValidationUtils.rejectIfEmpty(errors, "number", "number.notEmpty");
    }
}
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