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.druid.query.Queries.java

public static void verifyAggregations(List<AggregatorFactory> aggFactories, List<PostAggregator> postAggs) {
    Preconditions.checkNotNull(aggFactories, "aggregations cannot be null");
    Preconditions.checkArgument(aggFactories.size() > 0, "Must have at least one AggregatorFactory");

    final Set<String> aggNames = Sets.newHashSet();
    for (AggregatorFactory aggFactory : aggFactories) {
        Preconditions.checkArgument(aggNames.add(aggFactory.getName()), "[%s] already defined",
                aggFactory.getName());/*from   w  w  w  . j  a v a2s.  com*/
    }

    if (postAggs != null && !postAggs.isEmpty()) {
        final Set<String> combinedAggNames = Sets.newHashSet(aggNames);

        for (PostAggregator postAgg : postAggs) {
            final Set<String> dependencies = postAgg.getDependentFields();
            final Set<String> missing = Sets.difference(dependencies, combinedAggNames);

            Preconditions.checkArgument(missing.isEmpty(), "Missing fields [%s] for postAggregator [%s]",
                    missing, postAgg.getName());
            Preconditions.checkArgument(combinedAggNames.add(postAgg.getName()), "[%s] already defined");
        }
    }
}

From source file:com.google.security.zynamics.zylib.date.DateHelpers.java

public static String formatDate(final Date date) {
    Preconditions.checkNotNull(date, "Error: Date argument can't be null.");

    return DateFormat.getDateInstance().format(date);
}

From source file:app.philm.in.util.ColorValueAnimator.java

public static ValueAnimator start(final View rootView, final int[] current, final int[] target,
        final int duration, final OnColorSetListener listener) {

    Preconditions.checkNotNull(rootView, "rootView cannot be null");
    Preconditions.checkNotNull(current, "current cannot be null");
    Preconditions.checkNotNull(target, "target cannot be null");
    Preconditions.checkArgument(current.length == target.length, "current and target must be the same length");

    if (rootView.getDrawingTime() <= 0) {
        listener.onUpdateColor(target);//from   w  ww . j  a v  a2s .  c  o  m
        return null;
    }

    final int[] colors = new int[target.length];

    ValueAnimator animator = new ValueAnimator();
    animator.setFloatValues(0f, 1f);
    animator.setDuration(duration);
    animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator valueAnimator) {
            final float currentValue = 1f - (Float) valueAnimator.getAnimatedValue();

            for (int i = 0, z = colors.length; i < z; i++) {
                colors[i] = ColorUtils.blendColors(current[i], target[i], currentValue);
            }

            listener.onUpdateColor(colors);
        }
    });
    animator.start();

    return animator;
}

From source file:io.druid.indexing.common.task.TaskLabels.java

@Nullable
public static String getTaskLabel(Task task) {
    Preconditions.checkNotNull(task, "task");
    Map<String, Object> context = task.getContext();
    Object taskLabel = (context != null) ? context.get(TASK_LABEL_FIELD) : null;
    return taskLabel == null ? null : (String) taskLabel;
}

From source file:org.rpmcomparator.service.ValidatorUtil.java

/**
 * @param fileName/*from  w  ww .  j  a v a 2  s.co m*/
 * @return
 * @throws IOException,RuntimeException
 */
public static File getValideFile(String fileName) {
    File file = new File(Preconditions.checkNotNull(fileName, "Give file cannot be null"));
    Preconditions.checkArgument(file.exists(), "Give file:" + fileName + "Should exist");
    return file;
}

From source file:com.github.jcustenborder.kafka.connect.utils.config.TaskConfigs.java

/**
 * Method will create a single from the supplied settings.
 *
 * @param settings/*from www  . j  a v  a2s . c  o m*/
 * @return
 */
public static List<Map<String, String>> single(Map<String, String> settings) {
    Preconditions.checkNotNull(settings, "settings cannot be null.");
    return ImmutableList.of(settings);
}

From source file:com.google.cloud.tools.eclipse.appengine.validation.AppEngineWebBlacklist.java

static String getBlacklistElementMessage(String element) {
    Preconditions.checkNotNull(element, "element is null");
    if (!BLACKLIST.containsKey(element)) {
        throw new IllegalArgumentException("element not in blacklist");
    }//from   w  w  w  . j  a  v  a2 s.  c om
    return BLACKLIST.get(element);
}

From source file:com.zaradai.kunzite.optimizer.model.RowSchema.java

public static RowSchema newInstance(InputRowSchema inputRowSchema, OutputRowSchema outputRowSchema) {
    Preconditions.checkNotNull(inputRowSchema, "Invalid Input schema specified");
    Preconditions.checkNotNull(outputRowSchema, "Invalid Output schema specified");

    return new RowSchema(inputRowSchema, outputRowSchema);
}

From source file:com.zaradai.kunzite.optimizer.model.Row.java

public static Row newInstance(InputRow inputRow, OutputRow outputRow) {
    Preconditions.checkNotNull(inputRow, "Invalid input specified");
    Preconditions.checkNotNull(outputRow, "Invalid output specified");

    Row res = new Row();
    res.setInput(inputRow);/*from   w  ww . java2 s. co m*/
    res.setOutput(outputRow);

    return res;
}

From source file:com.zaradai.kunzite.optimizer.model.InputSpec.java

public static InputSpec newInstance(int position, Series series) {
    Preconditions.checkArgument(position >= 0, "Invalid input position specified");
    Preconditions.checkNotNull(series, "Invalid Series supplied");

    return new InputSpec(position, series);
}