我有两个arraylist orderList
,productList
和一个String arraylist customerIdList
的对象。
我有ProductInfo
POJO要与orderList和productList一起映射cuustomerId应匹配。
如果我没有给定ProdId的订单或产品清单,我应该添加标准错误并映射到ProductInfo错误。
这是我正在做的... < / p>
public class ProductInfo {
private List<ProductDetails> products;
private List<Error> errors;
private String customerId;
}
public class ProductDetails {
private String customerId;
private Order order;
private Product product;
private List<Error> errors;
}
示例结果......
{
"productInfo": {
"customer_id": "123",
"product_details": [
{
"customer_id": "123",
"order_details": null,
"product_details": {
"customer_id": "123"
"product_id" : "2343"
"product_name": "XYZ",
"product_type": "PQR"
...
},
"errors": [
"error_code":"6001",
"error_desc":"Failure in getting Order information from Order Service"
]
},
{
"order_details": {
"customer_id":"123"
"order_id": "3543454",
"order_date":"2016-10-12",
"order_status":"ordered"
},
"product_details": null,
"errors": [
"error_code":"6001",
"error_desc":"Failure in getting Product information from Product Service"
]
}
],
"system_errors":[]
}
}
循环遍历ArrayList和Mapping
for(String customerId : customerIdList) {
for(Product product: productList) {
for(SOrder ordr: orderList) {
if(customerId.equals(product.getCustomerId()) && customerId.equals(Order.getCustomerId()) ) {
ModelMapper mapper = new ModelMapper();
Order order = mapper.map(ordr, Order.class));
productDetails.setOrder(order);
//mapping to ProductInfo
productDetailsList.add(productDetails);
}
}
}
}
我想知道是否有更好的方法可以做到这一点,而且我使用ModelMapper
将SOrder
映射到Order
POJO,其他POJO希望知道是否有其他有效的模型映射器可用。
谢谢。
答案 0 :(得分:0)
您可以productList
和orderList
创建地图,其中customerId
为关键
Map<String, Product> productMap = productList.stream().collect(Collectors.toMap(p -> p.getCustomerId(), p -> p));
Map<String, Product> orderMap = orderList.stream().collect(Collectors.toMap(o -> o.getCustomerId(), o -> o));
然后只需一个循环就可以检查是否有该客户ID的产品和订单
for(String customerId : customerIdList) {
if (productMap.containsKey(customerId) && orderMap.containsKey(customerId)) {
//do your mapping stuff here
}
}