Example usage for java.util Objects requireNonNull

Introduction

In this page you can find the example usage for java.util Objects requireNonNull.

Prototype

public static <T> T requireNonNull(T obj, Supplier<String> messageSupplier) 

Source Link

Document

Checks that the specified object reference is not null and throws a customized NullPointerException if it is.

Usage

From source file:fr.landel.utils.commons.exception.ExceptionUtils.java

/**
 * Creates a supplier of the exception and injects the message
 * /*www  .  j a  va  2 s .  c  o m*/
 * <pre>
 * Optional.of(value).orElseThrow(ExceptionUtils.suppliesException(IllegalArgumentException::new, Locale.FRENCH,
 *         "La valeur n'est pas comprise entre %,.3f et %,.3f", min, max));
 * </pre>
 * 
 * @param supplier
 *            the exception supplier (required)
 * @param locale
 *            the message locale (optional)
 * @param message
 *            the error message (required)
 * @param arguments
 *            the message arguments
 * @param <E>
 *            the exception type
 * @return the exception supplier
 */
public static <E extends Throwable> Supplier<E> suppliesException(final Function<String, E> supplier,
        final Locale locale, final String message, final Object... arguments) {
    Objects.requireNonNull(supplier, "supplier");
    Objects.requireNonNull(message, "message");

    return () -> supplier.apply(String.format(
            ObjectUtils.defaultIfNull(locale, Locale.getDefault(Locale.Category.FORMAT)), message, arguments));
}

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From source file:fr.landel.utils.commons.ObjectUtils.java

/**
 * Returns a default value if the object passed is {@code null}.
 * /*from w  w w  . j  a v  a 2  s .com*/
 * <pre>
 * ObjectUtils.defaultIfNull(null, null, o -&gt; o.getTitle())              = null
 * ObjectUtils.defaultIfNull(null, "",  o -&gt; o.getTitle())               = ""
 * ObjectUtils.defaultIfNull(null, "zz", o -&gt; o.getTitle())              = "zz"
 * ObjectUtils.defaultIfNull("abc", "NO_TEXT", o -&gt; o.toUpperCase())     = "ABC"
 * ObjectUtils.defaultIfNull("false", Boolean.TRUE, Boolean::parseBoolean)  = Boolean.TRUE
 * </pre>
 * 
 * @param object
 *            the object to check
 * @param defaultObject
 *            the default value
 * @param transformer
 *            the object mapper
 * @param <T>
 *            the type of the object to check
 * @param <X>
 *            the type of the output
 * @return transformed {@code object} if not {@code null}, default value
 *         otherwise
 * @throws NullPointerException
 *             if {@code transformer} is {@code null}
 */
public static <T, X> X defaultIfNull(final T object, final X defaultObject, final Function<T, X> transformer) {
    Objects.requireNonNull(transformer, TRANSFORMER_ERROR);

    return object != null ? transformer.apply(object) : defaultObject;
}

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From source file:com.github.xbn.array.helper.ArrayHelperBaseComposer.java

public final void ciObjNullOrUnexpectedType_4prot(Object obj_supposedToBeArr, String array_objName) {
    Objects.requireNonNull(obj_supposedToBeArr, array_objName);
    ReflectRtxUtil.crashIfNotAssignableFrom(obj_supposedToBeArr.getClass(), getStaticClass());
}

---

From source file:com.cloudera.oryx.app.serving.kmeans.model.KMeansServingModelManager.java

/**
 * Called by the framework to initiate a continuous process of reading models, and reading
 * from the input topic and updating model state in memory, and issuing updates to the
 * update topic. This will be executed asynchronously and may block.
 *
 * @param updateIterator iterator to read models from
 * @throws IOException if an error occurs while reading updates
 *///from w  ww.jav a  2 s  .  co  m
@Override
public void consume(Iterator<KeyMessage<String, String>> updateIterator, Configuration hadoopConf)
        throws IOException {
    while (updateIterator.hasNext()) {
        KeyMessage<String, String> km = updateIterator.next();
        String key = km.getKey();
        String message = km.getMessage();
        Objects.requireNonNull(key, "Bad message: " + km);
        switch (key) {
        case "UP":
            if (model == null) {
                continue; // No model to interpret with yet, so skip it
            }
            List<?> update = MAPPER.readValue(message, List.class);
            // Update
            int id = Integer.parseInt(update.get(0).toString());
            double[] center = MAPPER.convertValue(update.get(1), double[].class);
            long count = Long.parseLong(update.get(2).toString());
            model.update(id, center, count);
            break;

        case "MODEL":
        case "MODEL-REF":
            log.info("Loading new model");
            PMML pmml = AppPMMLUtils.readPMMLFromUpdateKeyMessage(key, message, hadoopConf);

            KMeansPMMLUtils.validatePMMLVsSchema(pmml, inputSchema);
            List<ClusterInfo> clusters = KMeansPMMLUtils.read(pmml);
            model = new KMeansServingModel(clusters, inputSchema);
            log.info("New model: {}", model);
            break;

        default:
            throw new IllegalArgumentException("Bad message: " + km);
        }
    }
}

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From source file:com.github.yongchristophertang.engine.web.WebTemplateBuilder.java

/**
 * Set global default {@link ResultMatcher} for built {@link WebTemplate}.
 *///from w  w w.ja  va  2s.  c  o m
public WebTemplateBuilder alwaysExpect(ResultMatcher resultMatcher) {
    Objects.requireNonNull(resultMatcher, "resultMatcher must not be null");
    resultMatchers.add(resultMatcher);
    return this;
}

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From source file:de.tobiasbruns.fs20.sender.UsbService.java

private byte[] sendAndRecvData(UsbInterface iface, byte[] data) {
    Objects.requireNonNull(iface, "UsbInterface must not be null");

    try {//from   www  .j  a v a 2  s .  c om
        forceClaim(iface);
        try {
            UsbPipe pipe = iface.getUsbEndpoint((byte) 0x01).getUsbPipe();
            sendData(pipe, data);
            pipe = iface.getUsbEndpoint((byte) 0x81).getUsbPipe();
            return reciveData(pipe);
        } finally {
            iface.release();
        }
    } catch (UsbNotActiveException | UsbDisconnectedException | UsbException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.github.horrorho.inflatabledonkey.cloud.AuthorizeAssets.java

public AuthorizeAssets(String container, String zone) {
    this.container = Objects.requireNonNull(container, "container");
    this.zone = Objects.requireNonNull(zone, "zone");
}

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From source file:io.lavagna.web.security.PathConfiguration.java

List<UrlMatcher> buildMatcherList() {
    List<UrlMatcher> r = new ArrayList<>();

    if (!loginUrlDisabled) {
        Objects.requireNonNull(loginUrlMatcher, "login urls must be configured or disabled");
        Objects.requireNonNull(logoutUrlMatcher, "logout urls must be configured or disabled");

        r.add(loginUrlMatcher);// w w  w.j  a v  a 2s .c  o  m
        r.add(logoutUrlMatcher);
    }

    r.addAll(urlMatchers);
    return r;
}

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From source file:net.sf.jabref.model.entry.BibtexEntry.java

public BibtexEntry(String id, EntryType type) {
    Objects.requireNonNull(id, "Every BibtexEntry must have an ID");

    this.id = id;
    setType(type);
}

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From source file:edu.tamu.tcat.oss.account.test.mock.MockDataSource.java

public void activate() {
    try {//from  w  w w  .  j a v  a  2  s . com

        String url = props.getPropertyValue(PROP_URL, String.class);
        String user = props.getPropertyValue(PROP_USER, String.class);
        String pass = props.getPropertyValue(PROP_PASS, String.class);

        Objects.requireNonNull(url, "Database connection URL not supplied");
        Objects.requireNonNull(user, "Database username not supplied");
        Objects.requireNonNull(pass, "Database password not supplied");

        int maxActive = getIntValue(props, PROP_MAX_ACTIVE, 30);
        int maxIdle = getIntValue(props, PROP_MAX_IDLE, 3);
        int minIdle = getIntValue(props, PROP_MIN_IDLE, 0);
        int minEviction = getIntValue(props, PROP_MIN_EVICTION, 10 * 1000);
        int betweenEviction = getIntValue(props, PROP_BETWEEN_EVICTION, 100);

        PostgreSqlDataSourceFactory factory = new PostgreSqlDataSourceFactory();
        PostgreSqlPropertiesBuilder builder = factory.getPropertiesBuilder().create(url, user, pass);
        dataSource = factory.getDataSource(builder.getProperties());

        //HACK: should add this API to the properties builder instead of downcasting and overriding
        {
            BasicDataSource basic = (BasicDataSource) dataSource;

            basic.setMaxActive(maxActive);
            basic.setMaxIdle(maxIdle);
            basic.setMinIdle(minIdle);
            basic.setMinEvictableIdleTimeMillis(minEviction);
            basic.setTimeBetweenEvictionRunsMillis(betweenEviction);
        }

        this.executor = Executors.newSingleThreadExecutor();
    } catch (Exception e) {
        throw new IllegalStateException("Failed initializing data source", e);
    }
}

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