英文:
Best way to write multiple or conditions on a object in JAVA
问题
有没有更简便的方法执行 `||` 和 `&&` 操作，或许可以使用 Java 8？
因为我还有一些其他类似于 `OrderSummaryService` 的类，它们还有一些其他字段。
@Getter
@Setter
class Orders
{
String id;
String status;
Items items;
String orderDate;
String createdBy;
String updatedBy;
Double amount;
}
@Getter
@Setter
class Items
{
String itemId;
String itemName;
String amount;
String quantity;
}
class OrderSummaryService
{
public static void main(String args[])
{
Orders orders = orderRepository.getOrderDetails();
if (orders.getStatus() != null || orders.getCreatedBy() != null
|| orders.getUpdatedBy() != null || orders.getAmount() != null
|| (orders.getOrderDate() != null && orders.getItems() != null))
{
OrderDetail details = orderRepository.updateRepository();
ItemDetail itemDetail = itemRepository.updateItem();
// 一些服务代码
}
}
}
英文:
Is there an easier way to perform || and && operations, maybe using Java 8?
As I have some other classes like OrderSummaryService and it has some more fields.
@Getters
@Setters
class Orders
{
String id;
String status;
Items items;
String orderDate;
String createdBy;
String updatedBy;
Double amount;
}
@Getters
@Setters
class Items
{
String itemId;
String itemName;
String amount;
String quantity;
}
class OrderSummaryService
{
public static void main(String args[])
{
Orders orders = orderRepository.getOrderDetails();
if (orders.getStatus() != null || orders.getCreatedBy() != null
|| orders.getUpdatedBy() != null || orders.getAmount() != null
|| orders.getOrderDate() != null && orders.getItems() != null)
{
OrderDetail details = orderRepository.updateRepository();
ItemDetail itemDetail = itemRepository.updateItem();
// some service code
}
}
}
答案1
得分: 6
如果您打算在多个地方使用相同的逻辑，我会向Orders类添加一个方法，例如：
public boolean isValidOrders() {
return status != null || createdBy != null || updatedBy != null
|| amount != null || orderDate != null && items != null;
}
英文:
If you're going to be using the same logic in multiple places, I would add a method to the Orders class e.g.
public boolean isValidOrders() {
return status != null || createdBy != null || updatedBy != null
|| amount != null || orderDate != null && items != null;
}
答案2
得分: -1
你可以使用这段代码来替代||链：
Stream.of(orders.getStatus(), orders.getCreatedBy(), /*其他部分*/).anyMatch(Objects::nonNull)
anyMatch 是短路求值的，类似于逻辑或操作。
英文:
You can use this to replace the chain of ||s
Stream.of(orders.getStatus(), orders.getCreatedBy(), /*the others*/).anyMatch(Objects::nonNull)
anyMatch is short-circuiting, works similar to a logical or
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