JpaResourceFieldInformationProvider.java 文件源码

@Override
public Optional<Boolean> isPostable(BeanAttributeInformation attributeDesc) {
    Optional<Column> column = attributeDesc.getAnnotation(Column.class);
    Optional<Version> version = attributeDesc.getAnnotation(Version.class);
    if (!version.isPresent() && column.isPresent()) {
        return Optional.of(column.get().insertable());
    }
    Optional<GeneratedValue> generatedValue = attributeDesc.getAnnotation(GeneratedValue.class);
    if (generatedValue.isPresent()) {
        return Optional.of(false);
    }
    return Optional.empty();
}