Example usage for com.google.common.base Optional of

Introduction

In this page you can find the example usage for com.google.common.base Optional of.

Prototype

public static <T> Optional<T> of(T reference)

Source Link

Document

Returns an Optional instance containing the given non-null reference.

Usage

From source file:com.viadeo.kasper.exposition.http.jetty.resource.KasperDocResource.java

@GET
@Path("domain/{domainName}/{type}")
@Produces(MediaType.APPLICATION_JSON)/* w  ww .  j a v a  2 s  .co  m*/
public Object getEntities(@PathParam("domainName") final String domainName,
        @PathParam("type") final String type) {
    if (null == domainName) {
        return new RetUnexistent(DocumentedElementType.DOMAIN.getType(), DEFAULT_UNSPECIFIED);
    }

    final Optional<DocumentedDomain> domain = documentedPlatform.getDomain(domainName);

    if (!domain.isPresent()) {
        return new RetUnexistent(DocumentedElementType.DOMAIN.getType(), domainName);
    }

    final Optional<DocumentedElementType> documentedElementType = DocumentedElementType.of(type);

    if (documentedElementType.isPresent() && documentedElementType.get().getPluralType().equals(type)) {
        final DocumentedElementType elementType = documentedElementType.get();
        final List<AbstractDomainElement> documentedElements = get(domain.get(), elementType);
        return new RetMap(elementType.getType(), documentedElements);
    }

    return new RetUnexistent("type", type);
}

From source file:com.viadeo.kasper.exposition.http.jetty.resource.KasperDocResource.java

@GET
@Path("domain/{domainName}/{type}/{entityName}")
@Produces(MediaType.APPLICATION_JSON)//from  w  w  w  .jav  a2s .c  om
public Object getEntity(@PathParam("domainName") final String domainName, @PathParam("type") final String type,
        @PathParam("entityName") final String entityName) {

    if (null == domainName) {
        return new RetUnexistent(DocumentedElementType.DOMAIN.getType(), DEFAULT_UNSPECIFIED);
    }

    final Optional<DocumentedDomain> domain = documentedPlatform.getDomain(domainName);

    if (!domain.isPresent()) {
        return new RetUnexistent(DocumentedElementType.DOMAIN.getType(), DEFAULT_UNSPECIFIED);
    }

    final Optional<DocumentedElementType> documentedElementType = DocumentedElementType.of(type);

    if (documentedElementType.isPresent()) {
        final DocumentedElementType elementType = documentedElementType.get();
        final Optional<AbstractDomainElement> documentedElement = get(domain.get(), elementType, entityName);

        if (documentedElement.isPresent()) {
            return documentedElement.get();
        }

        return new RetUnexistent(elementType.getType(), entityName);
    }

    return new RetUnexistent("type", type);
}

From source file:gobblin.runtime.task.TaskUtils.java

/**
 * Parse the {@link TaskFactory} in the state if one is defined.
 *//*from  w w w .j  ava 2  s.  c om*/
public static Optional<TaskFactory> getTaskFactory(State state) {
    try {
        if (state.contains(TASK_FACTORY_CLASS)) {
            return Optional.of((TaskFactory) Class.forName(state.getProp(TASK_FACTORY_CLASS)).newInstance());
        } else {
            return Optional.absent();
        }
    } catch (ReflectiveOperationException roe) {
        throw new RuntimeException("Could not create task factory.", roe);
    }
}

From source file:org.brooklyncentral.catalog.scrape.CatalogItemScraper.java

private static Optional<String> getGithubRawText(String repoUrl, String fileName) {
    String rawGithubUrl = generateRawGithubUrl(repoUrl, fileName);

    try (InputStream inputStream = new URL(rawGithubUrl).openStream()) {
        return Optional.of(Streams.readFullyString(inputStream));
    } catch (Exception e) {
        // TODO Log or something: String error =
        // "Unable to read raw Github URL " + rawGithubUrl + ": " + e,
        // e);/*from  w  w  w .  ja va2 s  .  c  om*/
        return Optional.absent();
    }
}

From source file:com.google.devtools.build.lib.syntax.compiler.LoopLabels.java

/**
 * Only use Optional-wrapped instances of this class.
 *///from ww w . j  a va  2s .c o  m
public static Optional<LoopLabels> of(Label continueLabel, Label breakLabel) {
    return Optional.of(new LoopLabels(continueLabel, breakLabel));
}

From source file:com.ayuget.redface.util.UserUtils.java

/**
 * Ugly method to fetch a user id from stored cookies
 *///from w ww . j a v a2 s.c  o  m
public static Optional<Integer> getLoggedInUserId(User user, OkHttpClient httpClient) {
    CookieManager cookieManager = (CookieManager) httpClient.getCookieHandler();
    CookieStore cookieStore = cookieManager.getCookieStore();
    for (HttpCookie cookie : cookieStore.getCookies()) {
        if (cookie.getName().equals("md_id")) {
            return Optional.of(Integer.valueOf(cookie.getValue()));
        }
    }

    return Optional.absent();
}

From source file:de.flapdoodle.guava.Expectations.java

private static <T> Optional<T> intNoneOrOne(Iterator<T> iterator) {
    Preconditions.checkNotNull(iterator, "iterator is null");
    if (!iterator.hasNext()) {
        return Optional.absent();
    }//from   w  ww. j a v a  2 s . co m
    return Optional.of(iterator.next());
}

From source file:org.puder.trs80.ActivityHelper.java

/**
 * Returns an extra value with the given key, if the intent, the extras and the key itself are
 * present./* w ww . j a  v a 2s .co  m*/
 */
static Optional<Integer> getIntExtra(Intent intent, String key) {
    if (intent == null) {
        Log.i(TAG, "No intent.");
        return Optional.absent();
    }
    if (!intent.hasExtra(key)) {
        Log.i(TAG, StrUtil.form("No extra named '%s'.", key));
        return Optional.absent();
    }
    return Optional.of(intent.getIntExtra(key, 0));
}

From source file:com.google.template.soy.types.VeType.java

public static VeType of(String dataType) {
    Preconditions.checkNotNull(dataType);
    if (NullType.getInstance().toString().equals(dataType)) {
        return NO_DATA;
    }//  w  ww  . j  a v a 2 s  .co m
    return new VeType(Optional.of(dataType));
}

From source file:com.facebook.buck.cli.JavaUtilLogHandlers.java

public static Optional<ConsoleHandler> getConsoleHandler() {
    // We can't stop someone from mutating this array, but we can minimize the chance.
    ImmutableList<Handler> handlers = ImmutableList.copyOf(Logger.getLogger("").getHandlers());
    for (Handler handler : handlers) {
        if (handler instanceof ConsoleHandler) {
            return Optional.of((ConsoleHandler) handler);
        } else if (handler instanceof Callable<?>) {
            // com.facebook.buck.cli.bootstrapper.ConsoleHandler is not
            // visible to us, so thunk it through Callable<Handler> so
            // we can get at the real ConsoleHandler.
            Callable<?> callable = (Callable<?>) handler;
            try {
                Object innerHandler = callable.call();
                if (innerHandler instanceof ConsoleHandler) {
                    return Optional.of((ConsoleHandler) innerHandler);
                }//from w  ww .ja v  a2s  . c o  m
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    // If we hit this, something has gone wrong and we can't find the
    // ConsoleHandler from the list of registered log handlers.
    //
    // This means SuperConsole will not be notified when we print log
    // messages to console, so it will not disable itself, causing log
    // console logs to collide with SuperConsole output.
    System.err.println("WARNING: Cannot find ConsoleHandler log handler. "
            + "Logs printed to console will likely be lost.");
    return Optional.absent();
}