java Orika - 将对象映射到列表（一对多映射）
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Orika - mapping object to list (one to many mapping)
提问by lbednaszynski
I have following two classes
我有以下两节课
class A {
class InnerA {
private String field;
// getters/setters
}
private Collection<InnerA> collection;
// getters/setters
}
class B {
private String field;
// getters/setters
}
Is it possible to map A into Collection of B (A.collection.field should be mapped into Collection of B.field)?
是否可以将 A 映射到 B 的集合（A.collection.field 应该映射到 B.field 的集合）？
I tried to use custom converter but I have only to manage java.lang.VerifyError:
我尝试使用自定义转换器，但我只需要管理 java.lang.VerifyError：
mapperFactory.getConverterFactory().registerConverter(new CustomConverter<A, Collection<B>>() {
@Override
public Collection<B> convert(
A arg0, Type<? extends Collection<B>> arg1) {
Collection<B> result = new ArrayList<B>();
Iterator<Item> it = arg0.getCollection().iterator();
while(it.hasNext()){
it.next();
result.add(new B());
}
return result;
}
});
results in:
结果是：
java.lang.VerifyError: Inconsistent args count operand in invokeinterface in method ma.glasnost.orika.generated.Orika_ArrayList_A_Mapper845657274.mapAtoB(Ljava/lang/Object;Ljava/lang/Object;Lma/glasnost/orika/MappingContext;)V at offset 74
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2404)
at java.lang.Class.getConstructor0(Class.java:2714)
at java.lang.Class.newInstance0(Class.java:343)
at java.lang.Class.newInstance(Class.java:325)
采纳答案by Sidi
Of course you can map it, you have to just make InnerA public:
当然你可以映射它，你只需要公开 InnerA ：
List<B> dest = mapper.mapAsList(sourceA.getCollection(), B.class);
If InnerA is not public, it can not be used by Orika
如果 InnerA 不公开，则 Orika 不能使用它
MapperFacade mapper = new ConfigurableMapper() {
@Override
protected void configure(MapperFactory factory) {
factory.registerMapper(new CustomMapper<A, Collection<B>>() {
@Override
public void mapAtoB(A a, Collection<B> b, MappingContext context) { b.addAll(mapperFacade.mapAsList(a.collection, B.class));
for(B item : b) {
item.propertyA = a.propertyA;
}
}
});
factory.registerConcreteType(Collection.class, ArrayList.class);
}
};
final Type<Collection<B>> collectionOfB = new TypeBuilder<Collection<B>>() {}.build();
Collection<B> dest = mapper.map(source, TypeFactory.valueOf(A.class), collectionOfB);
