Example usage for com.google.common.base Preconditions checkNotNull

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkNotNull.

Prototype

public static <T> T checkNotNull(T reference, @Nullable Object errorMessage)

Source Link

Document

Ensures that an object reference passed as a parameter to the calling method is not null.

Usage

From source file:io.pravega.controller.store.client.impl.StoreClientConfigImpl.java

public static StoreClientConfig withZKClient(ZKClientConfig zkClientConfig) {
    Preconditions.checkNotNull(zkClientConfig, "zkClientConfig");
    return new StoreClientConfigImpl(StoreType.Zookeeper, Optional.of(zkClientConfig));
}

From source file:com.enonic.cms.core.timezone.TimeZoneXmlCreator.java

public Document createTimeZonesDocument(final Collection<DateTimeZone> timeZones) {
    Preconditions.checkNotNull(timeZones, "timeZones cannot be null");

    Element timeZonesEl = new Element("time-zones");
    for (DateTimeZone timeZone : timeZones) {
        timeZonesEl.addContent(doCreateTimeZoneElement(timeZone));
    }//from ww  w  .  j a v  a  2 s  .  c om
    return new Document(timeZonesEl);
}

From source file:com.qcadoo.mes.states.service.StateChangePhaseUtil.java

public static boolean canRun(final StateChangeContext stateChangeContext) {
    List<Entity> messages = stateChangeContext.getAllMessages();

    Preconditions.checkNotNull(messages, "entity " + stateChangeContext.getStateChangeEntity()
            + " should have messages in corresponding hasMany field!");
    return stateChangeContext.isOwnerValid() && stateChangeContext.getStatus().canContinue()
            && !hasFailureMessages(messages) && !hasValidationErrorMessages(messages);
}

From source file:com.facebook.util.reflection.ForwardReferenceProxy.java

private static <T> T wrap(Class<T> clazz, final AtomicReference<T> instance) {
    Preconditions.checkNotNull(instance, "must pass a non-null atomic reference");
    InvocationHandler handler = (proxy, method, args) -> method
            .invoke(Preconditions.checkNotNull(instance.get(), "instance has not been set"), args);

    T wrapper = (T) Proxy.newProxyInstance(clazz.getClassLoader(), new Class[] { clazz }, handler);

    return wrapper;
}

From source file:alluxio.util.network.HttpUtils.java

/**
 * Uses the post method to send a url with arguments by http, this method can call RESTful Api.
 *
 * @param url the http url/*from   w w w . ja  v  a 2 s  .c  o m*/
 * @param timeout milliseconds to wait for the server to respond before giving up
 * @param processInputStream the response body stream processor
 */
public static void post(String url, Integer timeout, IProcessInputStream processInputStream)
        throws IOException {
    Preconditions.checkNotNull(timeout, "timeout");
    Preconditions.checkNotNull(processInputStream, "processInputStream");
    PostMethod postMethod = new PostMethod(url);
    try {
        HttpClient httpClient = new HttpClient();
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(timeout);
        httpClient.getHttpConnectionManager().getParams().setSoTimeout(timeout);
        int statusCode = httpClient.executeMethod(postMethod);
        if (statusCode == HttpStatus.SC_OK || statusCode == HttpStatus.SC_CREATED) {
            InputStream inputStream = postMethod.getResponseBodyAsStream();
            processInputStream.process(inputStream);
        } else {
            throw new IOException("Failed to perform POST request. Status code: " + statusCode);
        }
    } finally {
        postMethod.releaseConnection();
    }
}

From source file:org.apache.mahout.math.als.AlternatingLeastSquaresSolver.java

public static Vector solve(Iterable<Vector> featureVectors, Vector ratingVector, double lambda,
        int numFeatures) {

    Preconditions.checkNotNull(featureVectors, "Feature Vectors cannot be null");
    Preconditions.checkArgument(!Iterables.isEmpty(featureVectors));
    Preconditions.checkNotNull(ratingVector, "Rating Vector cannot be null");
    Preconditions.checkArgument(ratingVector.getNumNondefaultElements() > 0, "Rating Vector cannot be empty");
    Preconditions.checkArgument(Iterables.size(featureVectors) == ratingVector.getNumNondefaultElements());

    int nui = ratingVector.getNumNondefaultElements();

    Matrix MiIi = createMiIi(featureVectors, numFeatures);
    Matrix RiIiMaybeTransposed = createRiIiMaybeTransposed(ratingVector);

    /* compute Ai = MiIi * t(MiIi) + lambda * nui * E */
    Matrix Ai = miTimesMiTransposePlusLambdaTimesNuiTimesE(MiIi, lambda, nui);
    /* compute Vi = MiIi * t(R(i,Ii)) */
    Matrix Vi = MiIi.times(RiIiMaybeTransposed);
    /* compute Ai * ui = Vi */
    return solve(Ai, Vi);
}

From source file:org.codehaus.httpcache4j.cache.Key.java

public static Key create(URI uri, Vary vary) {
    Preconditions.checkNotNull(uri, "URI may not be null");
    Preconditions.checkNotNull(vary, "vary may not be null");
    return new Key(URIBuilder.fromURI(uri).toNormalizedURI(), vary);
}

From source file:com.google.security.zynamics.binnavi.Gui.SettingsDialog.CActionProvider.java

/**
 * Prompts the user for the location of the IDA executable.
 * /*from   w ww  .  j a  v a2s.c  o  m*/
 * @param parent Parent component used to display dialogs.
 * @param initialDirectory The directory to select by default.
 * 
 * @return The selected IDA executable or null if no executable was selected.
 */
public static String selectIDADirectory(final Component parent, final String initialDirectory) {
    Preconditions.checkNotNull(parent, "IE02067: Parent argument can not be null");
    Preconditions.checkNotNull(initialDirectory, "IE02259: Initial directory can not be null");

    final CIdaSelectionDialog dialog = CIdaSelectionDialog.show(SwingUtilities.getWindowAncestor(parent),
            initialDirectory);

    final File selectedFile = dialog.getSelectedFile();

    if (selectedFile == null) {
        return null;
    } else if (!selectedFile.exists()) {
        CMessageBox.showError(parent, "File does not exist.");

        return null;
    } else if (selectedFile.canExecute()) {
        return selectedFile.getAbsolutePath();
    } else {
        CMessageBox.showError(parent, "File is not an executable file.");

        return null;
    }
}