[英]Orika no mapping of null elements in list
我有以下課程:
public class A{
List<AA> aaList;
public A(List<AA> aaList){
this.aaList = aaList;
}
//getters and setters + default constructor
public class AA {
String aaString;
public AA(String aaString){
this.aaString = aaString;
}
//getters and setters + default constructor
}
}
我希望有兩個同類的對象,讓我們說:
A a = new A(Arrays.asList(new A.AA(null)));
A a2 = new A(Arrays.asList(new A.AA("test")));
當我將a
映射到a2
, a2
應該保持test
因為a
有一個null
。
如何使用Orika
配置?
我嘗試過類似的東西:
mapperFactory.classMap(A.AA.class, A.AA.class)
.mapNulls(false)
.byDefault()
.register();
mapperFactory.classMap(A.class, A.class)
.mapNulls(false)
.customize(new CustomMapper<A, A>() {
@Override public void mapAtoB(A a, A a2,
MappingContext context) {
map(a.getAAList(), a2.getAAList());
}
})
.byDefault()
.register();
提前致謝
這是一個修改過的代碼片段,對我有用:
mapperFactory.classMap(A.class, A.class)
.mapNulls(false)
.customize(new CustomMapper<A, A>() {
@Override
public void mapAtoB(A a, A a2, MappingContext context) {
// 1. Returns new list with not null
List<A.AA> a1List = a.getAaList().stream()
.filter(a1 -> a1.getAaString() != null)
.collect(Collectors.toList());
// 2. Merges all the elements from 'a2' list into 'a' list
a1List.addAll(a2.getAaList());
// 3. Sets the list with merged elements into the 'a2'
a2.setAaList(a1List);
}
})
.register();
請注意,應刪除.byDefault()
以使自定義映射器正常工作。
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