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:com.github.jeluard.guayaba.lang.Classes.java

/**
 * @param type//w w  w . j  av a2 s. c om
 * @return all superClasses of specified {@link Class}
 */
public static List<Class<?>> allSuperClasses(final Class<?> type) {
    Preconditions.checkNotNull(type, "null type");

    final List<Class<?>> superClasses = new LinkedList<Class<?>>();
    Class<?> superClass = type.getSuperclass();
    while (superClass != null) {
        superClasses.add(superClass);
        superClass = superClass.getSuperclass();
    }
    return superClasses;
}

From source file:com.github.jeluard.stone.helper.Loggers.java

/**
 * @param suffix/*from www.ja v a  2s. c  o  m*/
 * @return a configured {@link Logger}
 */
public static Logger create(final String suffix) {
    Preconditions.checkNotNull(suffix, "null suffix");

    return Logger.getLogger(Loggers.BASE_LOGGER_NAME + "." + suffix);
}

From source file:org.fusesource.process.manager.support.FileUtils.java

public static void extractArchive(File archiveFile, File targetDirectory, String extractCommand,
        Duration timeLimit, Executor executor) throws CommandFailedException {
    Preconditions.checkNotNull(archiveFile, "archiveFile is null");
    Preconditions.checkNotNull(targetDirectory, "targetDirectory is null");
    Preconditions.checkArgument(targetDirectory.isDirectory(),
            "targetDirectory is not a directory: " + targetDirectory.getAbsolutePath());

    final String[] commands = extractCommand.split(" ");
    final String[] args = Arrays.copyOf(commands, commands.length + 1);
    args[args.length - 1] = archiveFile.getAbsolutePath();
    new Command(args).setDirectory(targetDirectory).setTimeLimit(timeLimit).execute(executor);
}

From source file:com.github.jeluard.guayaba.lang.ToStringBuilders.java

/**
 * @param object//  ww  w  . ja  v  a2s.c o m
 * @return a {@link String} representation of specified object.
 */
public static String reflectionToString(final Object object) {
    Preconditions.checkNotNull(object, "null object");

    final Objects.ToStringHelper toStringHelper = Objects.toStringHelper(object);
    for (final Field field : Classes.allFields(object.getClass())) {
        field.setAccessible(true);
        toStringHelper.add(field.getName(), Fields.get(field, object));
    }
    return toStringHelper.toString();
}

From source file:com.marand.thinkmed.medications.TherapyTaggingUtils.java

public static String generateTag(final TherapyTagEnum therapyTagEnum, @Nonnull final String centralCaseId) {
    Preconditions.checkNotNull(centralCaseId, "centralCaseId");
    return therapyTagEnum.getPrefix() + centralCaseId;
}

From source file:com.tansun.rocketmq.connect.tools.FastBeanUtils.java

public static Object copyProperties(Object source, Class<?> target) {
    Preconditions.checkNotNull(source, "Source must not be null!");
    Preconditions.checkNotNull(target, "Target must not be null!");

    Object targetObject = ReflectUtils.newInstance(target);
    BeanCopier beanCopier = BeanCopier.create(source.getClass(), target, false);
    beanCopier.copy(source, targetObject, null);

    return targetObject;
}

From source file:tv.icntv.recommend.common.ReflectionUtils.java

public static Object newInstance(String className)
        throws ClassNotFoundException, IllegalAccessException, InstantiationException {
    Preconditions.checkNotNull(null != className, "class name null");
    return classLoader.loadClass(className).newInstance();
}

From source file:io.pravega.common.io.StreamHelpers.java

/**
 * Reads at most 'maxLength' bytes from the given input stream, as long as the stream still has data to serve.
 *
 * @param stream      The InputStream to read from.
 * @param target      The target array to write data to.
 * @param startOffset The offset within the target array to start writing data to.
 * @param maxLength   The maximum number of bytes to copy.
 * @return The number of bytes copied.//  ww w  .  ja  va  2 s.c o m
 * @throws IOException If unable to read from the given stream.
 */
public static int readAll(InputStream stream, byte[] target, int startOffset, int maxLength)
        throws IOException {
    Preconditions.checkNotNull(stream, "stream");
    Preconditions.checkNotNull(stream, "target");
    Preconditions.checkElementIndex(startOffset, target.length, "startOffset");
    Exceptions.checkArgument(maxLength >= 0, "maxLength", "maxLength must be a non-negative number.");

    int totalBytesRead = 0;
    while (totalBytesRead < maxLength) {
        int bytesRead = stream.read(target, startOffset + totalBytesRead, maxLength - totalBytesRead);
        if (bytesRead < 0) {
            // End of stream/
            break;
        }

        totalBytesRead += bytesRead;
    }

    return totalBytesRead;
}

From source file:com.google.security.zynamics.binnavi.Gui.Debug.RemoteBrowser.FileBrowser.CRemoteBrowserHelpers.java

/**
 * Determines whether a given file is a drive or not.
 *
 * @param file The file in question./*from  w  ww  .j  a v a2  s  . c o  m*/
 *
 * @return True, if the file is a drive. False, otherwise.
 */
public static boolean isDrive(final File file) {
    Preconditions.checkNotNull(file, "IE01493: File argument can not be null");

    return file.getParent() == null;
}

From source file:io.pravega.common.concurrent.ExecutorServiceHelpers.java

/**
 * Gets a snapshot of the given ExecutorService.
 *
 * @param service The ExecutorService to request a snapshot on.
 * @return A Snapshot of the given ExecutorService, or null if not supported.
 *///  w ww  . j a v  a2 s .c  om
public static Snapshot getSnapshot(ExecutorService service) {
    Preconditions.checkNotNull(service, "service");
    if (service instanceof ThreadPoolExecutor) {
        val tpe = (ThreadPoolExecutor) service;
        return new Snapshot(tpe.getQueue().size(), tpe.getActiveCount(), tpe.getPoolSize());
    } else if (service instanceof ForkJoinPool) {
        val fjp = (ForkJoinPool) service;
        return new Snapshot(fjp.getQueuedSubmissionCount(), fjp.getActiveThreadCount(), fjp.getPoolSize());
    } else {
        return null;
    }
}