java - さまざまな種類のオブジェクト状態の検証を行う方法

Question

1 つまたは 2 つの異なるデータ ソースから、指定された日付範囲または年の範囲内のレコードを発信者に提供する必要があります。

私のジレンマは、オーバーロードされたメソッドまたは状態検証ロジックを持つ Request オブジェクトを使用する必要があるかどうかです。

したがって、次のいずれかです。

public List<Record> getRecords (Date fromDate, Date toDate, boolean dataSourceARequired, boolean dataSourceBRequired)

public List<Record> getRecords (int fromYear, int toYear, boolean dataSourceARequired, boolean dataSourceBRequired)

またはこのようなもの：

public List<Record> getRecords(Request request)

リクエストは次のようになります。

public class Request{

private final Date fromDate;
private final Date toDate;
private final int fromYear;
private final int toYear;
private final boolean dataSourceARequired;
private final boolean dataSourceBRequired;



public Request(Date fromDate, Date toDate, boolean dataSourceARequired, boolean dataSourceBRequired){

    if (fromDate == null) {
        throw new IllegalArgumentException("fromDate can't be null");
        }
     if (toDate == null) {
        throw new IllegalArgumentException("toDate can't be null");
        }
    if (!dataSourceARequired && !dataSourceBRequired){
        throw new IllegalStateException ("No data source requested");
        }
     if (fromDate.after(toDate)){
         throw new IllegalStateException ("startDate can't be after    endDate");
        }

     this.fromDate = fromDate;
     this.toDate = toDate;
     this.dataSourceARequired = dataSourceARequired;
     this.dataSourceBRequired = dataSourceBRequired;
     this.fromYear = -1;
     this.toYear = -1;

}


 public Request(int fromYear, int toYear, boolean dataSourceARequired, boolean dataSourceBRequired){

    if (fromYear > toYear) {
        throw new IllegalArgumentException("fromYear can't be greater than toYear");
        }
    if (!dataSourceARequired && !dataSourceBRequired){
        throw new IllegalStateException ("No data source requested");
        }

     this.dataSourceARequired = dataSourceARequired;
     this.dataSourceBRequired = dataSourceBRequired;
     this.fromYear = fromYear;
     this.toYear = toYear;
     this.fromDate = null;
     this.toDate = null;

}

}

それとも別の方法がありますか？