JpaResourceFieldInformationProvider.java 文件源码

@Override
public Optional<SerializeType> getSerializeType(BeanAttributeInformation attributeDesc) {
    Optional<OneToMany> oneToMany = attributeDesc.getAnnotation(OneToMany.class);
    if (oneToMany.isPresent()) {
        return toSerializeType(oneToMany.get().fetch());
    }
    Optional<ManyToOne> manyToOne = attributeDesc.getAnnotation(ManyToOne.class);
    if (manyToOne.isPresent()) {
        return toSerializeType(manyToOne.get().fetch());
    }
    Optional<ManyToMany> manyToMany = attributeDesc.getAnnotation(ManyToMany.class);
    if (manyToMany.isPresent()) {
        return toSerializeType(manyToMany.get().fetch());
    }
    Optional<ElementCollection> elementCollection = attributeDesc.getAnnotation(ElementCollection.class);
    if (elementCollection.isPresent()) {
        return toSerializeType(elementCollection.get().fetch());
    }
    return Optional.empty();
}