[英]Orika - mapping object to list (one to many mapping)
我有兩節課
class A {
class InnerA {
private String field;
// getters/setters
}
private Collection<InnerA> collection;
// getters/setters
}
class B {
private String field;
// getters/setters
}
是否可以將A映射到B的集合(A.collection.field應該映射到B.field的集合)?
我嘗試使用自定義轉換器,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;
}
});
結果是:
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)
當然你可以映射它,你必須公開InnerA:
List<B> dest = mapper.mapAsList(sourceA.getCollection(), B.class);
如果InnerA不公開,則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);
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