@Override
@Transactional
public UserDetails loadUserByUsername(final String login) {
log.debug("Authenticating {}", login);
String lowercaseLogin = login.toLowerCase();
Optional<User> userFromDatabase = userRepository.findOneByLogin(lowercaseLogin);
return userFromDatabase
.map(
user -> {
if (!user.getActivated()) {
throw new UserNotActivatedException(
"User " + lowercaseLogin + " was not activated");
}
List<GrantedAuthority> grantedAuthorities =
user.getAuthorities()
.stream()
.map(authority -> new SimpleGrantedAuthority(authority.getName()))
.collect(Collectors.toList());
return new org.springframework.security.core.userdetails.User(
lowercaseLogin, user.getPassword(), grantedAuthorities);
})
.orElseThrow(
() ->
new UsernameNotFoundException(
"User " + lowercaseLogin + " was not found in the " + "database"));
}
static void optionalTest() {
// 不要这样,这与!=null没什么区别
Optional<String> stringOptional = Optional.of("alibaba");
if (stringOptional.isPresent()) {
System.out.println(stringOptional.get().length());
}
Optional<String> optionalValue = Optional.of("alibaba");
// 下面是推荐的常用操作
optionalValue.ifPresent(s -> System.out.println(s + " contains red"));
// 增加到集合汇总
List<String> results = Lists.newArrayList();
optionalValue.ifPresent(results::add);
// 增加到集合中，并返回操作结果
Optional<Boolean> added = optionalValue.map(results::add);
// 无值的optional
Optional<String> optionalString = Optional.empty();
// 不存在值，返回“No word”
String result = optionalValue.orElse("No word");
// 没值，计算一个默认值
result = optionalString.orElseGet(() -> System.getProperty("user.dir"));
// 无值，抛一个异常
try {
result = optionalString.orElseThrow(NoSuchElementException::new);
} catch (Throwable t) {
t.getCause();
}
}
public Vec2 convertCoordinateSystem(Vec2 event) {
Optional<Drawing> drawing = this.find(Drawing.drawing, both()).findFirst();
return drawing
.map(x -> x.windowSystemToDrawingSystem(event))
.orElseThrow(
() ->
new IllegalArgumentException(
" cant mouse around something without drawing support (to provide coordinate system)"));
}
@Test
public void _07_옵션_다루기() {
final Optional<String> optional = words.stream().filter(w -> w.contains("red")).findFirst();
try {
optional.ifPresent(
v -> {
throw new RuntimeException();
});
assert false; // 이 행은 실행되면 안됨.
} catch (RuntimeException e) {
}
// 비어있는 경우는 실행되지 않음.
Optional.empty()
.ifPresent(
v -> {
throw new RuntimeException();
});
Set<String> results = new HashSet<>();
optional.ifPresent(results::add);
assertThat(results.contains("tired"), is(true));
// 실행 결과를 받고 싶은 경우에는 map 사용.
results = new HashSet<>();
Optional<Boolean> added = optional.map(results::add);
assertThat(added, is(Optional.of(Boolean.TRUE)));
// 대상이 빈경우에는 empty Optional 반환
Optional<Boolean> a = Optional.empty().map(v -> true);
assertThat(a.isPresent(), is(false));
Optional<String> emptyOptional = Optional.empty();
// orElse로 기본값 지정 가능
String result = emptyOptional.orElse("기본값");
assertThat(result, is("기본값"));
// 기본값 생성하는 코드 호출 가능
result = emptyOptional.orElseGet(() -> System.getProperty("user.dir"));
assertThat(result, is(System.getProperty("user.dir")));
// 값이 없는 경우 예외 던지기
try {
emptyOptional.orElseThrow(NoSuchElementException::new);
assert false;
} catch (NoSuchElementException e) {
}
}
@Override
public VulnerabilityUpdateStatus updateForComponent(String componentId) throws TException {
Optional<Component> component = vulnerabilityConnector.getComponent(componentId);
return component
.map(
c ->
c.isSetReleaseIds()
? c.getReleaseIds()
.stream()
.map(this::updateForRelease)
.reduce(
getEmptyVulnerabilityUpdateStatus(),
(r1, r2) -> reduceVulnerabilityUpdateStatus(r1, r2))
: getEmptyVulnerabilityUpdateStatus())
.orElse(getEmptyVulnerabilityUpdateStatus(RequestStatus.FAILURE));
}
@Override
public VulnerabilityUpdateStatus updateForProject(String projectId) throws TException {
Optional<Project> project = vulnerabilityConnector.getProject(projectId);
return project
.map(
r ->
r.isSetReleaseIdToUsage()
? r.getReleaseIdToUsage()
.keySet()
.stream()
.map(this::updateForRelease)
.reduce(
getEmptyVulnerabilityUpdateStatus(),
(r1, r2) -> reduceVulnerabilityUpdateStatus(r1, r2))
: getEmptyVulnerabilityUpdateStatus())
.orElse(getEmptyVulnerabilityUpdateStatus(RequestStatus.FAILURE));
}
@Override
public VulnerabilityUpdateStatus updateForRelease(String releaseId) {
Optional<Release> release = vulnerabilityConnector.getRelease(releaseId);
Optional<VulnerabilityUpdateStatus> updateStatus = release.map(this::updateForRelease);
return updateStatus.orElse(getEmptyVulnerabilityUpdateStatus(RequestStatus.FAILURE));
}
protected Optional<List<String>> extractInfo() {
Optional<Elements> elements =
elementsWithClass("player-info").findFirst().map(e -> e.getElementsByTag("p"));
return elements.map(this::childrenText);
}
