@Test
public void shouldConvertToJavaStream() {
final Value<Integer> value = of(1, 2, 3);
final java.util.stream.Stream<Integer> s1 = value.toJavaStream();
if (value.isSingleValued()) {
final java.util.stream.Stream<Integer> s2 = java.util.stream.Stream.of(1);
assertThat(List.ofAll(s1::iterator)).isEqualTo(List.ofAll(s2::iterator));
} else {
final java.util.stream.Stream<Integer> s2 = java.util.stream.Stream.of(1, 2, 3);
assertThat(List.ofAll(s1::iterator)).isEqualTo(List.ofAll(s2::iterator));
}
}
/**
* Given a list, this method will generate all combinations of multiset of this list. Example :
*
* <pre>combinationsMultiset(Arrays.asList("a", "c", "q"))</pre>
*
* <pre>
* [a, c, q]
* [c, q]
* [a, q]
* [a, c]
* [q]
* [c]
* [a]
* []
* </pre>
*
* @param l The list.
* @return All combination of multiset of the given list.
*/
private static <E> Stream<List<E>> combinationsMultiset(List<E> l) {
if (l.isEmpty()) {
return Stream.of(Collections.emptyList());
}
return combinationsMultiset(l.subList(1, l.size()))
.flatMap(t -> Stream.of(t, pipe(l.get(0), t)));
}
public void example() {
System.out.println(
Stream.of(IntStream.of(1), IntStream.of(2)).flatMapToInt((IntStream s) -> s).sum());
// unchanged, it's not using the varargs overload
System.out.println(Stream.of(IntStream.of(1)).flatMap(s -> s.boxed()).mapToInt(i -> i).sum());
}
public static void main(String[] args) throws Exception {
List<Integer> currentLocation = Arrays.asList(0, 0);
Stream houses =
Files.lines(new File("input.txt").toPath())
.flatMap(line -> Stream.of(line.split("")))
.map(
s -> {
matchPath(s, currentLocation);
return new ArrayList<>(currentLocation);
})
.distinct();
System.out.println(houses.count());
List<Integer> santa = Arrays.asList(0, 0);
List<Integer> robot = Arrays.asList(0, 0);
List<String> paths =
Files.lines(new File("input.txt").toPath())
.flatMap(line -> Stream.of(line.split("")))
.collect(Collectors.toList());
Stream houses2 =
IntStream.range(0, paths.size())
.mapToObj(
i -> {
if (i % 2 == 0) {
matchPath(paths.get(i), santa);
} else {
matchPath(paths.get(i), robot);
}
return Arrays.asList(santa, robot);
})
.flatMap(lists -> Stream.of(lists.get(0), lists.get(1)))
.distinct();
System.out.println(houses2.count());
}
public static void main(String[] args) throws IOException {
Path path = Paths.get("../alice.txt");
String contents = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
Stream<String> words = Stream.of(contents.split("[\\P{L}]+"));
show("words", words);
Stream<String> song = Stream.of("gently", "down", "the", "stream");
show("song", song);
Stream<String> silence = Stream.empty();
silence = Stream.<String>empty(); // Explicit type specification
show("silence", silence);
Stream<String> echos = Stream.generate(() -> "Echo");
show("echos", echos);
Stream<Double> randoms = Stream.generate(Math::random);
show("randoms", randoms);
Stream<BigInteger> integers = Stream.iterate(BigInteger.ONE, n -> n.add(BigInteger.ONE));
show("integers", integers);
Stream<String> wordsAnotherWay = Pattern.compile("[\\P{L}]+").splitAsStream(contents);
show("wordsAnotherWay", wordsAnotherWay);
try (Stream<String> lines = Files.lines(path, StandardCharsets.UTF_8)) {
show("lines", lines);
}
}
public static void main(String[] args) {
Personne[] tab = {
new Personne("thibault", "Rougier", 2001),
new Personne("thomas", "Niesseron", 1987),
new Personne("thifaine", "Mitenne", 1959),
new Personne("maxime", "Forest", 1995),
new Personne("jules", "Forest", 1995)
};
System.out.println("--- Nes apres 1985 : ");
Stream.of(tab)
.filter(pp -> pp.getAnnee() > 1985)
.forEach(pp -> System.out.print(pp.getPrenom() + ", "));
System.out.println("\n--- Nes avant 2000 :");
long nombre =
Stream.of(tab)
.filter(pp -> pp.getAnnee() < 2000)
.sorted(Comparator.comparing(Personne::getNom))
.peek(pp -> System.out.print(pp.getNom() + " "))
.count();
System.out.println("\n Ils sont " + nombre);
System.out.println("--- Tous tries sur nom + prenom : ");
Stream.of(tab)
.sorted(Comparator.comparing(pp -> pp.getNom() + pp.getPrenom()))
.forEach(pp -> System.out.print("(" + pp.getNom() + ", " + pp.getPrenom() + ") "));
}
@Override
public Iterator<Edge> edges(final Object... edgeIds) {
try {
if (0 == edgeIds.length) {
return new HadoopEdgeIterator(this);
} else {
// base the conversion function on the first item in the id list as the expectation is that
// these
// id values will be a uniform list
if (edgeIds[0] instanceof Edge) {
// based on the first item assume all Edges in the argument list
if (!Stream.of(edgeIds).allMatch(id -> id instanceof Edge))
throw Graph.Exceptions.idArgsMustBeEitherIdOrElement();
// no need to get the vertices again, so just flip it back - some implementation may want
// to treat this
// as a refresh operation. that's not necessary for hadoopgraph.
return Stream.of(edgeIds).map(id -> (Edge) id).iterator();
} else {
final Class<?> firstClass = edgeIds[0].getClass();
if (!Stream.of(edgeIds).map(Object::getClass).allMatch(firstClass::equals))
throw Graph.Exceptions
.idArgsMustBeEitherIdOrElement(); // todo: change exception to be ids of the same
// type
return IteratorUtils.filter(
new HadoopEdgeIterator(this), vertex -> ElementHelper.idExists(vertex.id(), edgeIds));
}
}
} catch (final IOException e) {
throw new IllegalStateException(e.getMessage(), e);
}
}
@SuppressWarnings("unchecked")
private static <T> T instantiate(
Class<T> clazz, List<Class<?>> matchingClasses, Object... preInstancedDependencies) {
try {
logger.info("Creating instance of: " + clazz);
Constructor<?> clazzConstructor = Stream.of(clazz.getConstructors()).findFirst().get();
Class<?>[] parameterTypes = clazzConstructor.getParameterTypes();
if (parameterTypes.length > 0) {
Object[] paramInstances =
Stream.of(parameterTypes)
.map(
paramType ->
Stream.of(preInstancedDependencies)
.filter(obj -> paramType.isInstance(obj))
.findFirst()
.orElseGet(
() ->
instantiate(
paramType, matchingClasses, preInstancedDependencies)))
.toArray();
return (T) clazzConstructor.newInstance(paramInstances);
} else {
return clazz.newInstance();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static Map<String, Method> addMethods(
Map<String, Method> methods, Class<?> clazz, Predicate<Method> filter) {
requireNonNull(methods);
requireNonNull(filter);
// clazz nullable (why?)
if (clazz == Object.class) {
return methods;
}
if (clazz == null) {
return methods;
}
Stream.of(clazz.getDeclaredMethods())
.filter(filter)
.forEach(
m -> {
methods.putIfAbsent(m.getName(), m); // Put only the most recent
// concrete version of the
// method
});
addMethods(methods, clazz.getSuperclass(), filter); // Recursively add
// the superclass
// methods
Stream.of(clazz.getInterfaces())
.forEach(
i -> {
addMethods(methods, i, filter); // Recursively add the extended
// interfaces (because they can
// contain default methods)
});
return methods;
}
public static void main(String[] args) {
// stream.collect(collector): values
// Collectors.groupingBy(classifier)
Stream<Locale> locales = Stream.of(Locale.getAvailableLocales());
Map<String, List<Locale>> languageToLocales =
locales.collect(Collectors.groupingBy(Locale::getDisplayLanguage));
System.out.println(languageToLocales);
System.out.println("--------------");
// stream.collect(collector): values
// Collectors.groupingBy(classifier, downstream)
locales = Stream.of(Locale.getAvailableLocales());
Map<String, Long> languageToLocalesCounting =
locales.collect(Collectors.groupingBy(Locale::getDisplayLanguage, Collectors.counting()));
System.out.println(languageToLocalesCounting);
System.out.println("--------------");
// stream.collect(collector): values
// Collectors.partitioningBy(predicate)
locales = Stream.of(Locale.getAvailableLocales());
Map<Boolean, List<Locale>> englishAndOtherLocales =
locales.collect(Collectors.partitioningBy(l -> l.getLanguage().equals("en")));
List<Locale> englishLocales = englishAndOtherLocales.get(true);
System.out.println(englishLocales);
System.out.println("--------------");
}
@Test
public void testConsumers() {
final AtomicLong lc = new AtomicLong(0L);
Assert.assertEquals(Anoa.of(1L), handler.consumer(lc::addAndGet).apply(handler.of(1L)));
Assert.assertEquals(1L, lc.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.consumerChecked(
__ -> {
throw new IOException();
})
.apply(handler.of(1L)));
final AtomicLong lc2 = new AtomicLong(0L);
Assert.assertEquals(
Anoa.of(1L),
handler.biConsumer((Long x, Long y) -> lc2.addAndGet(x + y)).apply(Anoa.of(1L), 1L));
Assert.assertEquals(2L, lc2.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.biConsumerChecked(
(_1, _2) -> {
throw new IOException();
})
.apply(Anoa.of(1L), 1L));
}
@Test
public void testFunctions() {
final AtomicLong lf = new AtomicLong(10L);
Assert.assertEquals(Anoa.of(10L), handler.function(lf::getAndAdd).apply(handler.of(1L)));
Assert.assertEquals(11L, lf.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.functionChecked(
__ -> {
throw new IOException();
})
.apply(handler.of(1L)));
final AtomicLong lf2 = new AtomicLong(10L);
Assert.assertEquals(
Anoa.of(10L),
handler.biFunction((Long x, Long y) -> lf2.getAndAdd(x + y)).apply(Anoa.of(1L), 1L));
Assert.assertEquals(12L, lf2.get());
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.biFunctionChecked(
(_1, _2) -> {
throw new IOException();
})
.apply(Anoa.of(1L), 1L));
}
public static void main(String[] args) {
// An Operation on a stream that returns a stream is an intermediary operation
Stream<String> stream1 = Stream.of("one", "two", "three", "four", "five");
Predicate<String> p1 = Predicate.isEqual("two");
stream1.filter(p1); // This is an intermediary operation and it does nothing!
/*
The below piece of code does nothing!
peek() and filter() methods are intermediary operations as they return a stream.
Hence, this code does not prints anything.
It is just a simple declaration.
*/
List<String> result1 = new ArrayList<>();
Stream<String> stream2 = Stream.of("one", "two", "three", "four", "five");
Predicate<String> p2 = Predicate.isEqual("two");
stream2.peek(System.out::println).filter(p2).peek(result1::add);
System.out.println("size -> " + result1.size());
System.out.println("******************************************");
/*
Using Final method (forEach())
Only the Final operation triggers the processing of the data the stream is connected to.
*/
List<String> result2 = new ArrayList<>();
Stream<String> stream3 = Stream.of("one", "two", "three", "four", "five");
Predicate<String> p3 = Predicate.isEqual("two");
Predicate<String> p4 = Predicate.isEqual("three");
stream3.peek(System.out::println).filter(p3.or(p4)).forEach(result2::add);
System.out.println("size -> " + result2.size());
}
/**
* @param collector to perform aggregation / reduction operation on the results from active stage
* (e.g. to Collect into a List or String)
* @param fn Function that receives the results of all currently active tasks as input
* @return A new builder object that can be used to define the next stage in the dataflow
*/
@SuppressWarnings({"unchecked", "rawtypes"})
default <T, R> SimpleReactStream<R> allOf(final Collector collector, final Function<T, R> fn) {
CompletableFuture[] array = lastActiveArray(getLastActive());
CompletableFuture cf = CompletableFuture.allOf(array);
Function<Exception, T> f =
(Exception e) -> {
BlockingStreamHelper.capture(e, getErrorHandler());
return BlockingStreamHelper.block(
this, Collectors.toList(), new StreamWrapper(Stream.of(array), true));
};
CompletableFuture onFail = cf.exceptionally(f);
CompletableFuture onSuccess =
onFail.thenApplyAsync(
(result) -> {
return new StageWithResults(this.getTaskExecutor(), null, result)
.submit(
() ->
(R)
fn.apply(
BlockingStreamHelper.aggregateResults(
collector,
Stream.of(array).collect(Collectors.toList()),
getErrorHandler())));
},
getTaskExecutor());
return (SimpleReactStream<R>) withLastActive(new StreamWrapper(onSuccess, isEager()));
}
private void afterDeploymentValidation(
@Observes AfterDeploymentValidation adv, BeanManager manager) {
Collection<CamelContext> contexts = new ArrayList<>();
for (Bean<?> context : manager.getBeans(CamelContext.class, ANY)) {
contexts.add(getReference(manager, CamelContext.class, context));
}
// Add type converters to Camel contexts
CdiTypeConverterLoader loader = new CdiTypeConverterLoader();
for (Class<?> converter : converters) {
for (CamelContext context : contexts) {
loader.loadConverterMethods(context.getTypeConverterRegistry(), converter);
}
}
// Add routes to Camel contexts
boolean deploymentException = false;
Set<Bean<?>> routes = new HashSet<>(manager.getBeans(RoutesBuilder.class, ANY));
routes.addAll(manager.getBeans(RouteContainer.class, ANY));
for (Bean<?> context : manager.getBeans(CamelContext.class, ANY)) {
for (Bean<?> route : routes) {
Set<Annotation> qualifiers = new HashSet<>(context.getQualifiers());
qualifiers.retainAll(route.getQualifiers());
if (qualifiers.size() > 1) {
deploymentException |= !addRouteToContext(route, context, manager, adv);
}
}
}
// Let's return to avoid starting misconfigured contexts
if (deploymentException) {
return;
}
// Trigger eager beans instantiation (calling toString is necessary to force
// the initialization of normal-scoped beans).
// FIXME: This does not work with OpenWebBeans for bean whose bean type is an
// interface as the Object methods does not get forwarded to the bean instances!
eagerBeans.forEach(type -> getReferencesByType(manager, type.getJavaClass(), ANY).toString());
manager
.getBeans(Object.class, ANY, STARTUP)
.stream()
.forEach(bean -> getReference(manager, bean.getBeanClass(), bean).toString());
// Start Camel contexts
for (CamelContext context : contexts) {
if (ServiceStatus.Started.equals(context.getStatus())) {
continue;
}
logger.info("Camel CDI is starting Camel context [{}]", context.getName());
try {
context.start();
} catch (Exception exception) {
adv.addDeploymentProblem(exception);
}
}
// Clean-up
Stream.of(converters, camelBeans, eagerBeans, cdiBeans).forEach(Set::clear);
Stream.of(producerBeans, producerQualifiers).forEach(Map::clear);
}
protected OptionalEntity<FileConfig> getFileConfig(final CreateForm form) {
final String username = systemHelper.getUsername();
final long currentTime = systemHelper.getCurrentTimeAsLong();
return getEntity(form, username, currentTime)
.map(
entity -> {
entity.setUpdatedBy(username);
entity.setUpdatedTime(currentTime);
copyBeanToBean(
form,
entity,
op ->
op.exclude(
Stream.concat(
Stream.of(Constants.COMMON_CONVERSION_RULE),
Stream.of(Constants.PERMISSIONS))
.toArray(n -> new String[n])));
final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();
entity.setPermissions(
split(form.permissions, "\n")
.get(
stream ->
stream
.map(s -> permissionHelper.encode(s))
.filter(StringUtil::isNotBlank)
.distinct()
.toArray(n -> new String[n])));
return entity;
});
}
public ResearchNode(String name, NodeState defState, ResearchNode... pre) {
this.name = name;
defaultState = defState;
dependencies = Stream.of(pre).map(ResearchNode::getName).collect(Collectors.toList());
dependants = new ArrayList<>();
Stream.of(pre).forEach(n -> n.addDependant(this));
}
@Test
public void collectCombinedArrayWhenStreamCombinedWithAnotherInParallel() throws Exception {
NSArray<String> result =
concat(Stream.of("test1").parallel(), Stream.of("test2").parallel()).collect(toNSArray());
assertThat(result.size(), is(2));
assertThat(result, hasItems("test1", "test2"));
}
public static void main(String... args) {
/*
-------------------------------------------------------------------------
From obj to ...
-------------------------------------------------------------------------
*/
Stream<String> streamOfStrings = Stream.of("un", "deux", "trois");
Function<String, StringBuilder> function = StringBuilder::new;
streamOfStrings.map(function) /*.forEach(System.out::println)*/;
streamOfStrings = Stream.of("un", "deux", "trois");
ToIntFunction<String> toIntFunction = String::length;
IntStream streamOfInts = streamOfStrings.mapToInt(toIntFunction);
streamOfStrings = Stream.of("un", "deux", "trois");
ToDoubleFunction<String> toDoubleFunction = String::length;
DoubleStream streamOfDoubles = streamOfStrings.mapToDouble(toDoubleFunction);
streamOfStrings = Stream.of("un", "deux", "trois");
ToLongFunction<String> toLongFunction = String::length;
LongStream streamOfLongs = streamOfStrings.mapToLong(toLongFunction);
/*
-------------------------------------------------------------------------
From int to ...
-------------------------------------------------------------------------
*/
IntUnaryOperator plusplus = i -> i++;
IntStream.of(1, 2, 3).map(plusplus)
/*.forEach(x->System.out.println(x))*/ ;
IntFunction<String> intFunction = i -> "" + i;
IntStream.of(1, 2, 3).mapToObj(intFunction)
/*.forEach(System.out::println)*/ ;
IntToDoubleFunction itdf = i -> i;
IntStream.of(1, 2, 3).mapToDouble(itdf)
/*.forEach(System.out::println)*/ ;
IntToLongFunction itlf = i -> i;
IntStream.of(1, 2, 3).mapToLong(itlf)
/*.forEach(System.out::println)*/ ;
/*
-------------------------------------------------------------------------
From long to ...
-------------------------------------------------------------------------
*/
LongUnaryOperator times = l -> l * l;
LongStream.of(1L, 2L, 3L).map(times)
/*.forEach(System.out::println)*/ ;
LongFunction<String> lf = l -> "toto";
LongStream.of(1L, 2L, 3L).mapToObj(lf);
/*
-------------------------------------------------------------------------
From double to ...
-------------------------------------------------------------------------
*/
DoubleToIntFunction dtif = d -> (int) d;
DoubleStream.of(1.3, 1.5, 1.6).mapToInt(dtif).forEach(System.out::println);
}
@Test
public void testZip() {
Stream<Predicate<Integer>> predicates = Stream.of(i -> true, i -> false);
Stream<Function<Integer, Integer>> functions = Stream.of(i -> i + 2, i -> i * 100);
val cases = Cases.zip(predicates, functions);
assertThat(cases.size(), is(2));
assertThat(cases.match(100).get(), is(102));
}
public class BuiltinDerivator {
private static final Function<Make, Stream<Make>> dependencies =
Makes.cases()
.lambdaVisitor(Stream::<Make>of)
.constructors(Stream::of)
.lazyConstructor(Stream::of)
.patternMatching(() -> Stream.of(lambdaVisitor))
.getters(() -> Stream.of(lambdaVisitor))
.modifiers(() -> Stream.of(lambdaVisitor, constructors))
.catamorphism(() -> Stream.of(lambdaVisitor))
.hktCoerce(Stream::of);
public static BiFunction<AlgebraicDataType, DeriveContext, DeriveResult<DerivedCodeSpec>>
derivator(DeriveUtils deriveUtils) {
return (adt, deriveContext) ->
traverseResults(
deriveContext.makes(),
Makes.cases()
.lambdaVisitor(
lazy(() -> MapperDerivator.derive(adt, deriveContext, deriveUtils)))
.constructors(
lazy(
() ->
StrictConstructorDerivator.derive(adt, deriveContext, deriveUtils)))
.lazyConstructor(
lazy(
() -> LazyConstructorDerivator.derive(adt, deriveContext, deriveUtils)))
.patternMatching(
lazy(
() -> PatternMatchingDerivator.derive(adt, deriveContext, deriveUtils)))
.getters(lazy(() -> GettersDerivator.derive(adt, deriveContext, deriveUtils)))
.modifiers(lazy(() -> ModiersDerivator.derive(adt, deriveContext, deriveUtils)))
.catamorphism(
lazy(() -> new CataDerivator(deriveUtils, deriveContext, adt).derive()))
.hktCoerce(DeriveResult.result(DerivedCodeSpec.none())))
.map(
codeSpecList ->
codeSpecList.stream().reduce(DerivedCodeSpec.none(), DerivedCodeSpec::append));
}
public static Set<Make> makeWithDpendencies(Make... makes) {
EnumSet<Make> makeSet = EnumSet.noneOf(Make.class);
makeSet.addAll(
Arrays.asList(makes)
.stream()
.flatMap(m -> Stream.concat(dependencies.apply(m), Stream.of(m)))
.collect(Collectors.toList()));
return Collections.unmodifiableSet(makeSet);
}
}
@Test
public void _02_스트림_생성() {
// 배열로 부터~
Stream<String> words = Stream.of(contents.split("[\\P{L}]+"));
// 가변 인자로..
Stream<String> song = Stream.of("gently", "down", "the", "stream");
// 빈 스트림
Stream<String> silence = Stream.empty();
}
TypeName cataMapperTypeName(DataConstructor dc) {
TypeName[] argsTypeNames =
concat(
dc.arguments().stream().map(DataArgument::type),
dc.typeRestrictions()
.stream()
.map(TypeRestriction::idFunction)
.map(DataArgument::type))
.map(t -> Utils.asBoxedType.visit(t, utils.types()))
.map(this::substituteTypeWithRecursionVar)
.map(TypeName::get)
.toArray(TypeName[]::new);
return adt.dataConstruction().isVisitorDispatch()
? argsTypeNames.length == 0
? ParameterizedTypeName.get(
ClassName.get(FlavourImpl.findF0(context.flavour(), utils.elements())),
TypeName.get(adt.matchMethod().returnTypeVariable()))
: argsTypeNames.length == 1
? ParameterizedTypeName.get(
ClassName.get(FlavourImpl.findF(context.flavour(), utils.elements())),
argsTypeNames[0],
TypeName.get(adt.matchMethod().returnTypeVariable()))
: ParameterizedTypeName.get(
Utils.getClassName(context, MapperDerivator.mapperInterfaceName(dc)),
concat(
concat(
dc.typeVariables().stream().map(TypeVariableName::get),
fold(
MapperDerivator.findInductiveArgument(utils, adt, dc),
Stream.<TypeName>of(),
tm ->
Stream.of(
ParameterizedTypeName.get(
ClassName.get(
FlavourImpl.findF0(
context.flavour(), utils.elements())),
TypeName.get(
adt.matchMethod().returnTypeVariable()))))),
Stream.of(TypeVariableName.get(adt.matchMethod().returnTypeVariable())))
.toArray(TypeName[]::new))
: TypeName.get(
utils
.types()
.getDeclaredType(
Utils.asTypeElement.visit(dc.deconstructor().visitorType().asElement()).get(),
dc.deconstructor()
.visitorType()
.getTypeArguments()
.stream()
.map(this::substituteTypeWithRecursionVar)
.toArray(TypeMirror[]::new)));
}
@Test
public void findAllStream() {
Object id0 = "id0";
Object id1 = "id1";
Entity entity0 = mock(Entity.class);
Entity entity1 = mock(Entity.class);
Stream<Object> entityIds = Stream.of(id0, id1);
when(decoratedRepository.findAll(entityIds)).thenReturn(Stream.of(entity0, entity1));
Stream<Entity> expectedEntities = entityListenerRepositoryDecorator.findAll(entityIds);
assertEquals(expectedEntities.collect(Collectors.toList()), Arrays.asList(entity0, entity1));
}
public static void main(String[] args) {
// check args
Stream.of(args).forEach(System.out::println);
// check .
Stream.of(new File(".").list()).forEach(System.out::println);
// check external libs
Client client = ClientBuilder.newClient();
String response = client.target("https://api.github.com/zen").request().get(String.class);
System.out.println(response);
}
public static void main(String[] args) {
// 스트림 생성
Stream<String> song = Stream.of("gently", "down", "the", "stream");
// 난수 100개
Stream<Double> randoms = Stream.generate(Math::random).limit(100);
//
Stream<String> uniqueWords = Stream.of("merrily", "merrily", "merrily", "gentyl").distinct();
Stream<Double> greatFirst =
randoms.sorted(Comparator.comparing(Double::doubleValue).reversed());
greatFirst.forEach(System.out::println);
}
public static void main(String[] args) {
Integer[] array = new Integer[] {1, 2, 3};
System.out.println("============");
Stream.of(array).forEach(System.out::println);
Sec02.swap(array, 0, 1);
System.out.println("============");
Stream.of(array).forEach(System.out::println);
Sec02.<Integer>swap(array, 1, 2);
System.out.println("============");
Stream.of(array).forEach(System.out::println);
}
private Mono<Object[]> resolveArguments(
ServerWebExchange exchange, BindingContext bindingContext, Object... providedArgs) {
if (ObjectUtils.isEmpty(getMethodParameters())) {
return NO_ARGS;
}
try {
List<Mono<Object>> monos =
Stream.of(getMethodParameters())
.map(
param -> {
param.initParameterNameDiscovery(this.parameterNameDiscoverer);
GenericTypeResolver.resolveParameterType(param, getBean().getClass());
if (!ObjectUtils.isEmpty(providedArgs)) {
for (Object providedArg : providedArgs) {
if (param.getParameterType().isInstance(providedArg)) {
return Mono.just(providedArg).log("reactor.resolved");
}
}
}
HandlerMethodArgumentResolver resolver =
this.resolvers
.stream()
.filter(r -> r.supportsParameter(param))
.findFirst()
.orElseThrow(() -> getArgError("No resolver for ", param, null));
try {
return resolver
.resolveArgument(param, bindingContext, exchange)
.defaultIfEmpty(NO_VALUE)
.doOnError(
cause -> {
if (logger.isDebugEnabled()) {
logger.debug(
getDetailedErrorMessage("Error resolving ", param), cause);
}
})
.log("reactor.unresolved");
} catch (Exception ex) {
throw getArgError("Error resolving ", param, ex);
}
})
.collect(Collectors.toList());
// Create Mono with array of resolved values...
return Mono.when(monos, args -> Stream.of(args).map(o -> o != NO_VALUE ? o : null).toArray());
} catch (Throwable ex) {
return Mono.error(ex);
}
}
@Test
public void findAllStreamFetch() {
Fetch fetch = new Fetch();
Object id0 = "id0";
Object id1 = "id1";
Entity entity0 = Mockito.mock(Entity.class);
Entity entity1 = Mockito.mock(Entity.class);
Stream<Object> entityIds = Stream.of(id0, id1);
Mockito.when(decoratedRepository.findAll(entityIds, fetch))
.thenReturn(Stream.of(entity0, entity1));
Stream<Entity> expectedEntities = entityListenerRepositoryDecorator.findAll(entityIds, fetch);
Assert.assertEquals(
expectedEntities.collect(Collectors.toList()), Arrays.asList(entity0, entity1));
}
@Test
public void testPredicates() {
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.FAIL)),
handler.predicate(__ -> false, __ -> Stream.of(Meta.FAIL)).apply(Anoa.of(1L)));
Assert.assertEquals(
Anoa.empty(Stream.of(Meta.OTHER)),
handler
.predicateChecked(
__ -> {
throw new IOException();
},
__ -> Stream.of(Meta.FAIL))
.apply(Anoa.of(1L)));
}