Java Code Examples for java.util.function.Consumer

public static void showAndWait(String url, 
        Predicate<WebEngine> loginSuccessTest,
        Consumer<WebEngine> handler) {
    try {
        FXMLLoader loader = new FXMLLoader(LoginController.class.getResource("/fxml/login.fxml"));

        Stage stage = new Stage();
        stage.setScene(new Scene(loader.load()));
        LoginController controller = loader.<LoginController>getController();
        controller.setUrl(url);
        controller.setLoginSuccessTest(loginSuccessTest);
        controller.setHandler(handler);

        stage.setTitle("Login...");
        stage.initModality(Modality.APPLICATION_MODAL);

        stage.showAndWait();
    } catch (IOException ex) {
        throw new RuntimeException(ex);
    }
}
 

@Override
public boolean onCommand(Message message, String[] args) {
    if (args.length == 0) {
        return sendErrorMessage(message, "Missing argument `ip`, you must include a valid IP address.");
    }

    if (!urlRegEX.matcher(args[0]).find()) {
        return sendErrorMessage(message, "Invalid IP address given, you must parse a valid IP address.");
    }

    RequestFactory.makeGET("http://ipinfo.io/" + args[0] + "/json").send((Consumer<Response>) response -> {
        JSONObject json = new JSONObject(response.toString());

        MessageFactory.makeEmbeddedMessage(message.getChannel(), Color.decode("#005A8C"),
            new MessageEmbed.Field("Hostname", json.has("hostname") ? json.getString("hostname") : "Unknown", true),
            new MessageEmbed.Field("Organisation", json.has("org") ? json.getString("org") : "Unknown", true),
            new MessageEmbed.Field("Country", generateLocation(json), false)
        ).setTitle(args[0]).setFooter(generateFooter(message), null).queue();
    });

    return true;
}
 

private static <T, S extends Spliterator<T>> void testSplitAfterFullTraversal(
        Supplier<S> supplier,
        UnaryOperator<Consumer<T>> boxingAdapter) {
    // Full traversal using tryAdvance
    Spliterator<T> spliterator = supplier.get();
    while (spliterator.tryAdvance(boxingAdapter.apply(e -> { }))) { }
    Spliterator<T> split = spliterator.trySplit();
    assertNull(split);

    // Full traversal using forEach
    spliterator = supplier.get();
    spliterator.forEachRemaining(boxingAdapter.apply(e -> {
    }));
    split = spliterator.trySplit();
    assertNull(split);

    // Full traversal using tryAdvance then forEach
    spliterator = supplier.get();
    spliterator.tryAdvance(boxingAdapter.apply(e -> { }));
    spliterator.forEachRemaining(boxingAdapter.apply(e -> {
    }));
    split = spliterator.trySplit();
    assertNull(split);
}
 

/**
 * Creates context for update operation.
 * @param srcRoot the root
 * @param isCopyResources true for resource update
 * @param cacheRoot the cache root
 * @param updated the changed files
 * @param deleted the deleted files
 * @param firer the fire callback
 * @return the {@link Context} for update operation
 */
@NonNull
public static Context update(
        @NonNull final URL srcRoot,
        final boolean isCopyResources,
        @NonNull final File cacheRoot,
        @NonNull final Iterable<? extends File> updated,
        @NonNull final Iterable<? extends File> deleted,
        @NullAllowed final Consumer<Iterable<File>> firer) {
    Parameters.notNull("srcRoot", srcRoot); //NOI18N
    Parameters.notNull("cacheRoot", cacheRoot); //NOI18N
    Parameters.notNull("updated", updated); //NOI18N
    Parameters.notNull("deleted", deleted); //NOI18N            
    return new Context(
            Operation.UPDATE, srcRoot, isCopyResources, false, cacheRoot, updated, deleted, null, firer);
}
 

static void test(String algo, Provider provider, boolean priv,
        Consumer<Key> method) throws Exception {
    KeyPairGenerator generator;
    try {
        generator = KeyPairGenerator.getInstance(algo, provider);
    } catch (NoSuchAlgorithmException nsae) {
        return;
    }

    System.out.println("Checking " + provider.getName() + ", " + algo);

    KeyPair pair = generator.generateKeyPair();
    Key key = priv ? pair.getPrivate() : pair.getPublic();

    pair = null;
    for (int i = 0; i < 32; ++i) {
        System.gc();
    }

    try {
        method.accept(key);
    } catch (ProviderException pe) {
        failures++;
    }
}
 

/**
 * Visit all geometries.
 *
 * @param spatial  the spatial
 * @param consumer the consumer
 */
public static void visitGeometry(@NotNull final Spatial spatial, @NotNull final Consumer<Geometry> consumer) {

    if (spatial instanceof Geometry) {
        consumer.accept((Geometry) spatial);
        return;
    } else if (!(spatial instanceof Node)) {
        return;
    }

    final Node node = (Node) spatial;

    for (final Spatial children : node.getChildren()) {
        visitGeometry(children, consumer);
    }
}
 

public static <T> Stream<T> distinct(Stream<T> src, Comparator<T> cmp) {
    Spliterator<T> iter = src.spliterator();
    Spliterator<T> res = new AbstractSpliterator<T>(Long.MAX_VALUE, Spliterator.ORDERED ) {
        // ArrayList<T> distinctData = new ArrayList<>();
        TreeSet<T> distinctData = new TreeSet<>(cmp);
        @Override
        public boolean tryAdvance(Consumer<? super T> action) {
            return iter.tryAdvance( item -> {
                // Versão 1: if (!contains(distinctData, cmp, item)) {
                // Versão 2: if(!distinctData.stream().anyMatch(e -> cmp.compare(e, item) == 0)) {
                // Versão 3:
                if (!distinctData.contains(item)) {
                    distinctData.add(item);
                    action.accept(item);
                }
            });
        }
    };
    return StreamSupport.stream(res, false);
}
 

private static void assertGenerated(Class<?> clazz, String name, Consumer<ThriftIdlGeneratorConfig.Builder> configConsumer)
        throws IOException
{
    String expected = Resources.toString(getResource(format("expected/%s.txt", name)), UTF_8);

    ThriftIdlGeneratorConfig.Builder config = ThriftIdlGeneratorConfig.builder()
            .includes(ImmutableMap.of())
            .namespaces(ImmutableMap.of())
            .recursive(true);
    configConsumer.accept(config);

    ThriftIdlGenerator generator = new ThriftIdlGenerator(config.build());
    String idl = generator.generate(ImmutableList.of(clazz.getName()));

    assertEquals(idl, expected);
}
 

public void testRetryAndSucceed() throws Exception {
    AtomicBoolean called = new AtomicBoolean();
    Consumer<Response> checkResponse = r -> {
        assertThat(r.getFailures(), hasSize(0));
        called.set(true);
    };
    retriesAllowed = between(1, Integer.MAX_VALUE);
    sourceWithMockedRemoteCall("fail:rejection.json", "start_ok.json").doStart(checkResponse);
    assertTrue(called.get());
    assertEquals(1, retries);
    retries = 0;
    called.set(false);
    sourceWithMockedRemoteCall("fail:rejection.json", "scroll_ok.json").doStartNextScroll("scroll", timeValueMillis(0),
            checkResponse);
    assertTrue(called.get());
    assertEquals(1, retries);
}
 

public boolean tryAdvance(Consumer<? super V> action) {
    int hi;
    if (action == null)
        throw new NullPointerException();
    Node<K,V>[] tab = map.table;
    if (tab != null && tab.length >= (hi = getFence()) && index >= 0) {
        while (current != null || index < hi) {
            if (current == null)
                current = tab[index++];
            else {
                V v = current.value;
                current = current.next;
                action.accept(v);
                if (map.modCount != expectedModCount)
                    throw new ConcurrentModificationException();
                return true;
            }
        }
    }
    return false;
}
 

@Override
public void mousePressed(final MouseEvent e) {
  this.setLocation(e);
  this.setPressed(true);
  final MouseEvent wrappedEvent = this.createEvent(e);
  this.mouseListeners.forEach(listener -> listener.mousePressed(wrappedEvent));

  if (SwingUtilities.isLeftMouseButton(e)) {
    this.isLeftMouseButtonDown = true;
  }

  if (SwingUtilities.isRightMouseButton(e)) {
    this.isRightMouseButtonDown = true;
  }

  for (final Consumer<MouseEvent> cons : this.mousePressedConsumer) {
    cons.accept(wrappedEvent);
  }
}
 

private void testCase(Query query, String field, int precision, CheckedConsumer<RandomIndexWriter, IOException> buildIndex,
                      Consumer<InternalGeoHashGrid> verify) throws IOException {
    Directory directory = newDirectory();
    RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory);
    buildIndex.accept(indexWriter);
    indexWriter.close();

    IndexReader indexReader = DirectoryReader.open(directory);
    IndexSearcher indexSearcher = newSearcher(indexReader, true, true);

    GeoGridAggregationBuilder aggregationBuilder = new GeoGridAggregationBuilder("_name").field(field);
    aggregationBuilder.precision(precision);
    MappedFieldType fieldType = new GeoPointFieldMapper.GeoPointFieldType();
    fieldType.setHasDocValues(true);
    fieldType.setName(FIELD_NAME);
    try (Aggregator aggregator = createAggregator(aggregationBuilder, indexSearcher, fieldType)) {
        aggregator.preCollection();
        indexSearcher.search(query, aggregator);
        aggregator.postCollection();
        verify.accept((InternalGeoHashGrid) aggregator.buildAggregation(0L));
    }
    indexReader.close();
    directory.close();
}
 

protected void parse(Path file, Consumer<MnpParser.Number> consumer) throws IOException {
    try(Stream<String> linesStream = Files.lines(file, charset)) {
        linesStream.
            skip(skipLines).
            forEach(line -> {
                String[] data = line.split(Character.toString(delimeter));
                String subscriber = countryCode + data[0].trim();
                String title = data[1].trim();
                MnpParser.Number number = new MnpParser.Number(subscriber, title);
                try {
                    consumer.accept(number);
                } catch (Throwable t) {
                    System.err.print("Error at file: "+file+", line: "+line);
                    t.printStackTrace();
                }
            });
    }
}
 

public void testExecuteSuccessWithOnFailure() throws Exception {
    Processor processor = mock(Processor.class);
    when(processor.getType()).thenReturn("mock_processor_type");
    when(processor.getTag()).thenReturn("mock_processor_tag");
    Processor onFailureProcessor = mock(Processor.class);
    CompoundProcessor compoundProcessor = new CompoundProcessor(false, Collections.singletonList(processor),
            Collections.singletonList(new CompoundProcessor(onFailureProcessor)));
    when(store.get("_id")).thenReturn(new Pipeline("_id", "_description", version, compoundProcessor));
    IndexRequest indexRequest = new IndexRequest("_index", "_type", "_id").source(Collections.emptyMap()).setPipeline("_id");
    doThrow(new RuntimeException()).when(processor).execute(eqID("_index", "_type", "_id", Collections.emptyMap()));
    @SuppressWarnings("unchecked")
    Consumer<Exception> failureHandler = mock(Consumer.class);
    @SuppressWarnings("unchecked")
    Consumer<Boolean> completionHandler = mock(Consumer.class);
    executionService.executeIndexRequest(indexRequest, failureHandler, completionHandler);
    verify(failureHandler, never()).accept(any(ElasticsearchException.class));
    verify(completionHandler, times(1)).accept(true);
}
 

public void forEachRemaining(Consumer<? super Map.Entry<K, V>> action) {
    int i, hi, mc;
    if (action == null)
        throw new NullPointerException();
    WeakHashMap<K,V> m = map;
    WeakHashMap.Entry<K,V>[] tab = m.table;
    if ((hi = fence) < 0) {
        mc = expectedModCount = m.modCount;
        hi = fence = tab.length;
    }
    else
        mc = expectedModCount;
    if (tab.length >= hi && (i = index) >= 0 &&
        (i < (index = hi) || current != null)) {
        WeakHashMap.Entry<K,V> p = current;
        current = null; // exhaust
        do {
            if (p == null)
                p = tab[i++];
            else {
                Object x = p.get();
                V v = p.value;
                p = p.next;
                if (x != null) {
                    @SuppressWarnings("unchecked") K k =
                        (K) WeakHashMap.unmaskNull(x);
                    action.accept
                        (new AbstractMap.SimpleImmutableEntry<K,V>(k, v));
                }
            }
        } while (p != null || i < hi);
    }
    if (m.modCount != mc)
        throw new ConcurrentModificationException();
}
 

protected <R extends TransactionRequest<R>> R testForwardToLocal(final TransactionRequest<?> toForward,
                                                              final Class<R> expectedMessageClass) {
    final Consumer<Response<?, ?>> callback = createCallbackMock();
    final TransactionTester<LocalReadWriteProxyTransaction> transactionTester = createLocalProxy();
    final LocalReadWriteProxyTransaction successor = transactionTester.getTransaction();
    transaction.forwardToLocal(successor, toForward, callback);
    return transactionTester.expectTransactionRequest(expectedMessageClass);
}
 

public DatarouterHttpResponse execute(DatarouterHttpRequest request, Consumer<HttpEntity> httpEntityConsumer){
	try{
		return executeChecked(request, httpEntityConsumer);
	}catch(DatarouterHttpException e){
		throw new DatarouterHttpRuntimeException(e);
	}
}
 

/**
 * Adds {@code source} to be converted.
 * {@code aftereffect} will be applied against the conversion result after the batch completes.
 */
public void accept(F source, Consumer<? super T> aftereffect) {
  requireNonNull(aftereffect);
  accept(source, v -> {
    aftereffect.accept(v);
    return v;
  });
}
 

/**
 * Wraps a {@link SubMonitor}
 */
public SubMonitorMsg(SubMonitor subMonitor, Consumer<String> callbackMsg, Consumer<String> callbackErr,
		CheckCanceled checkCanceled) {

	this.subMonitor = subMonitor;
	this.monitor = subMonitor;
	this.callbackMsg = callbackMsg;
	this.callbackErr = callbackErr;
	this.checkCanceled = checkCanceled;
}
 

/**
 * Adds a Consumer<Chronology> to the list of listeners to be notified
 * if the Chronology changes.
 * @param listener a Consumer<Chronology> to be called when Chronology changes
 */
void addChronoChangedListener(Consumer<Chronology> listener) {
    if (chronoListeners == null) {
        chronoListeners = new ArrayList<Consumer<Chronology>>();
    }
    chronoListeners.add(listener);
}
 

void getStartMatches(String name, int start, Consumer<T> hook){
	int len=name.length(),end=start+l;
	if(start>=len||(end>len&&name.regionMatches(start, namePart, 0, Math.min(end, len)-start))){
		if(hasValue) hook.accept(value);
	}else if(!match(name, start)) return;
	for(Node node:children){
		node.getStartMatches(name, end, hook);
	}
}
 

public Checker(Consumer<ReferenceInfo<Object[]>> weakHumongousCheck,
               Consumer<ReferenceInfo<Object[]>> softHumongousCheck,
               Consumer<ReferenceInfo<Object[]>> weakSimpleCheck,
               Consumer<ReferenceInfo<Object[]>> softSimpleCheck) {
    this.weakHumongousCheck = weakHumongousCheck;
    this.softHumongousCheck = softHumongousCheck;
    this.weakSimpleCheck = weakSimpleCheck;
    this.softSimpleCheck = softSimpleCheck;
}
 

public static void timeExecution(Runnable task, Consumer<Long> timeConsumer)
{
    timeExecution(() ->
    {
        task.run();
        return 0;
    }, timeConsumer);
}
 

/**
		 * Forwards a message to the ambient job and blocks on its execution.
		 */
		@Override
		public <T> void send(Consumer<T> callback, T state) {
			Requires.notNull(callback, "callback");

			// Some folks unfortunately capture the SynchronizationContext from the UI thread
			// while this one is active.  So forward it to the underlying sync context to not break those folks.
			// Ideally this method would throw because synchronously crossing threads is a bad idea.
			if (mainThreadAffinitized) {
				if (jobFactory.getContext().isOnMainThread()) {
					callback.accept(state);
				} else {
					jobFactory.getContext().getUnderlyingSynchronizationContext().send(callback, state);
				}
			} else {
//#if DESKTOP
//                    bool isThreadPoolThread = Thread.CurrentThread.IsThreadPoolThread;
//#else
//                    // On portable profile this is the best estimation we can do.
//                    bool isThreadPoolThread = !this.jobFactory.Context.IsOnMainThread;
//#endif
				boolean isThreadPoolThread = !jobFactory.getContext().isOnMainThread();
				if (isThreadPoolThread) {
					callback.accept(state);
				} else {
					CompletableFuture.runAsync(ExecutionContext.wrap(() -> callback.accept(state))).join();
				}
			}
		}
 

/**
 * Returns a {@link ArrayList} with all values from one coloumn
 *
 * @param column the colum to get it's values from
 * @return an {@link ArrayList} with all values
 */
public void getList(String column, Consumer<List<String>> callback) {
    Bukkit.getScheduler().runTaskAsynchronously(AlphaLibary.getInstance(), () -> {
        List<String> list = new LinkedList<>();
        if (api != null) {
            if (api.isConnected()) {
                try {
                    ResultSet rs = api.getSQLiteConnection().prepareStatement("SELECT " + column + " FROM " + tableName + ";").executeQuery();

                    if (rs == null) {
                        Bukkit.getScheduler().runTask(AlphaLibary.getInstance(), () -> callback.accept(list));
                        return;
                    }

                    while (rs.next()) {
                        String str = rs.getString(column);

                        if (str.startsWith("{") && str.endsWith("}"))
                            list.add(str);
                        else {
                            if (!str.contains(", ")) {
                                list.add(str.replace("[", "").replace("]", ""));
                            } else {
                                String[] strlist = str.split(", ");
                                for (String aStrlist : strlist) {
                                    list.add(aStrlist.replace("[", "").replace("]", ""));
                                }
                            }
                        }
                    }

                    Bukkit.getScheduler().runTask(AlphaLibary.getInstance(), () -> callback.accept(list));
                    return;
                } catch (SQLException ignored) {
                }
            }
        }
        Bukkit.getScheduler().runTask(AlphaLibary.getInstance(), () -> callback.accept(list));
    });
}
 

/**
 * Adds a route to a remover function with none extra parameters.
 *
 * @param  consumer the remover function that removes the item
 * @return the updated builder
 */
public Builder<T, S> addRemover(Consumer<S> consumer) {
	_deleteItemConsumer = httpServletRequest -> path -> consumer.accept(
		_getIdentifier(path));

	return this;
}
 

@Override
public boolean onCommand(Message message, String[] args) {
    RequestFactory.makeGET("http://api.icndb.com/jokes/random")
        .addParameter("escape", "javascript")
        .send((Consumer<Response>) response -> {
            ChuckNorrisService service = (ChuckNorrisService) response.toService(ChuckNorrisService.class);

            MessageFactory.makeSuccess(message, prepareJoke(message, args, service.getValue().getJoke())).queue();
        });
    return true;
}
 

public static void getAddressAsync(Plugin plugin, Consumer<String> callback) {
    Bukkit.getScheduler().runTaskAsynchronously(plugin, () -> {
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    new URL("http://checkip.amazonaws.com").openStream()));
            callback.accept(reader.readLine());
        } catch (IOException e) {
            Static.log(e);
        }
    });
}
 

@SafeVarargs
protected final void startRestRouter(Future<Void> future, Consumer<RestRouter>... consumers) {
  SChain.of(config().getInteger("http.port", getRandomUnboundPort()))
      .toPChain(RestRouter.create(vertx))
      .mapSnd(restRouter -> chain(restRouter, consumers).build())
      .mapSnd((port, router) -> createHttpServer(router, port))
      .mapSChain((port, single) -> single.flatMap(v -> publishHttpEndpoint(port)))
      .peek(single -> single.subscribe(toSubscriber(future.completer())));

  /*chain(config().getInteger("http.port", getRandomUnboundPort()), port ->
      createHttpServer(chain(RestRouter.create(vertx), consumers).build(), port)
          .flatMap(v -> publishHttpEndpoint(port))
          .subscribe(toSubscriber(future.completer())));*/
}
 

public void testDiscardReturnBound() throws IOException, ClassNotFoundException {
    List<String> list = new ArrayList<>();
    Consumer<String> c = (Consumer<String> & Serializable) list::add;
    assertSerial(c, cc -> { assertTrue(cc instanceof Consumer); });

    AtomicLong a = new AtomicLong();
    LongConsumer lc = (LongConsumer & Serializable) a::addAndGet;
    assertSerial(lc, plc -> { plc.accept(3); });
}
 

public JsonObject array(String key, Consumer<JsonArray> value) {
	requireNonNull(key, "JSON keys must not be null.");

	JSONArray jsonOrgArray = new JSONArray();
	JsonArray jsonArray = new JsonArray(jsonOrgArray, nullHandlingStrategy);
	value.accept(jsonArray);

	suppress(() -> jsonOrgObject.put(key, jsonOrgArray));

	return this;
}
 

public boolean tryAdvance(Consumer<? super K> action) {
    if (hasNext()) {
        action.accept(next());
        return true;
    }
    return false;
}
 

@Override
public boolean tryAdvance(Consumer<? super String> action) {
    String line = readLine();
    if (line != null) {
        action.accept(line);
        return true;
    } else {
        return false;
    }
}
 

@Override
public void forEachRemaining(Consumer<? super P_OUT> consumer) {
    if (buffer == null && !finished) {
        Objects.requireNonNull(consumer);
        init();

        ph.wrapAndCopyInto((Sink<P_OUT>) consumer::accept, spliterator);
        finished = true;
    }
    else {
        do { } while (tryAdvance(consumer));
    }
}
 

/**
 * For quoted arguments with spaces that repeat just one completion
 */
public Expect words(Consumer<Expect> consumer)
{
    Expect inner = splitInner(expect -> expect.then(consumer).repeat());
    descriptionU(Iterables.getLast(inner.mapLastDescriptions((i, s) -> s)));
    return this;
}
 

@Override
public void onMoved(final Consumer<IMovableEntity> consumer) {
  if (this.entityMovedConsumer.contains(consumer)) {
    return;
  }

  this.entityMovedConsumer.add(consumer);
}
 

private void performFileActionsInEachModule(Predicate<Path> fileTest,
                                                Consumer<Path> fileAction,
                                                Path relativeSubPath) throws IOException {
        Consumer<Path> processModuleDir = (modulePath) -> {
//            System.out.println("Processing module [" + modulePath.getFileName().toString() + "]");
            try {
//                Path srcPath = Paths.get(modulePath.toString(), "src", "main", "java");
                Path srcPath = modulePath.resolve(relativeSubPath);
//                System.out.println("srcPath [" + srcPath + "]");

                if (Files.isDirectory(srcPath)) {
                    Files.walk(srcPath)
                            .parallel()
                            .filter(Files::isRegularFile)
                            .filter(fileTest)
                            .filter(path -> path.getFileName().toString().endsWith(".java"))
                            .forEach(fileAction);
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        };

        Files.list(PROJECT_ROOT_PATH)
                .parallel()
                .filter(Files::isDirectory)
//                .filter(fileTest)
                .forEach(processModuleDir);

    }
 

/**
 * Runs runnable and makes some checks to ensure that it throws expected exception.
 * @param runnable what we run
 * @param checkException a consumer which checks that we got expected exception and raises a new exception otherwise
 */
public static void runAndCheckException(Runnable runnable, Consumer<Throwable> checkException) {
    try {
        runnable.run();
        checkException.accept(null);
    } catch (Throwable t) {
        checkException.accept(t);
    }
}
 

SimpleAction(
        @NonNull final String name,
        final Consumer<? super Context> performer) {
    Parameters.notNull("name", name);           //NOI18N
    Parameters.notNull("performer", performer); //NOI18N
    this.name = name;
    this.performer = performer;
}
 

public void viewDirFiles(String dirPath, String extension) throws IOException{
	Consumer<String> readStr = System.out::println;
	Stream<Path> stream = Files.list(Paths.get(dirPath)).sequential();
	stream.map(String::valueOf)
	        .filter(path -> path.endsWith(extension))
	        .forEach(readStr);
}