JpaResourceFieldInformationProvider.java 文件源码

@Override
public Optional<String> getOppositeName(BeanAttributeInformation attributeDesc) {
    Optional<OneToMany> oneToMany = attributeDesc.getAnnotation(OneToMany.class);
    if (oneToMany.isPresent()) {
        return Optional.ofNullable(StringUtils.emptyToNull(oneToMany.get().mappedBy()));
    }
    Optional<ManyToMany> manyToMany = attributeDesc.getAnnotation(ManyToMany.class);
    if (manyToMany.isPresent()) {
        return Optional.ofNullable(StringUtils.emptyToNull(manyToMany.get().mappedBy()));
    }
    return Optional.empty();
}