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

Introduction

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

Prototype

public static void checkArgument(boolean expression, @Nullable Object errorMessage)

Source Link

Document

Ensures the truth of an expression involving one or more parameters to the calling method.

Usage

From source file:org.impressivecode.depress.mr.judy.JudyEntriesParser.java

public static List<Class> unmarshalResults(final String path) throws JAXBException {
    Preconditions.checkArgument(!isNullOrEmpty(path), "Path has to be set.");
    JAXBContext jaxbContext = JAXBContext.newInstance(JudyXmlResult.class);
    Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();

    JudyXmlResult result = (JudyXmlResult) unmarshaller.unmarshal(new File(path));
    return result.getClasses().getClazz();
}

From source file:org.arbeitspferde.friesian.RandomNumber.java

/** Generates a random number based on the input max and min parameters */
public static int generate(int min, int max, Random rng) {
    Preconditions.checkArgument(max > 0, "Max must be positive");
    Preconditions.checkArgument(min <= max, "Min must be less than or equal to max");

    int range = max - min;
    int result = min;

    if (range == 0) {
        return min;
    }/*from www.j  a v  a  2s .  c o  m*/

    try {
        result = min + rng.nextInt(range + 1);
    } catch (Exception e) {
        log.log(Level.WARNING, String.format("min: %d  min: %d", min, max), e);
    }

    return result;
}

From source file:com.google.cloud.bigtable.grpc.ResultQueueEntry.java

public static <T> ResultQueueEntry<T> newResult(T response) {
    Preconditions.checkArgument(response != null, "Response may not be null");
    return new ResultQueueEntry<>(null, response, false);
}

From source file:io.spikex.core.util.XXHash32.java

public static int hash(final String utf8Str, final int salt) {

    Preconditions.checkArgument((utf8Str != null && utf8Str.length() > 0), "utf8Str is null or empty");

    byte[] data = utf8Str.getBytes(StandardCharsets.UTF_8);
    return FACTORY.hash32().hash(data, 0, data.length, salt);
}

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

public static <L, R> Either<L, R> leftOrRight(L left, R right, String errorMessage) {
    Preconditions.checkArgument(Logics.xor(left, right), errorMessage);
    if (left != null) {
        return left(left);
    }/*from w w w .  j av  a2 s  .  c o m*/
    return right(right);
}

From source file:com.cloudera.flume.handlers.debug.NullSink.java

public static SinkBuilder builder() {
    return new SinkBuilder() {
        @Override/*  w ww . j av  a 2 s  .co  m*/
        public EventSink build(Context context, String... argv) {
            Preconditions.checkArgument(argv.length == 0, "usage: null");
            return new NullSink();
        }
    };
}

From source file:org.caleydo.view.bicluster.util.TesselatedBiClusterPolygons.java

public static Band band(List<Vec2f> anchorPoints, final float z, float radiusFirst, float radiusSecond,
        int numberOfSplinePoints) {
    Preconditions.checkArgument(anchorPoints.size() >= 2, "at least two points");

    List<Vec3f> curve = Splines.spline3(Lists.transform(anchorPoints, new Function<Vec2f, Vec3f>() {
        @Override//  w  w  w.ja va2s. com
        public Vec3f apply(Vec2f in) {
            return new Vec3f(in.x(), in.y(), z);
        }
    }), numberOfSplinePoints);

    return toBand(curve, radiusFirst, radiusSecond);
}

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);/*w w w.  ja  v  a  2 s.  com*/
        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:com.google.template.soy.jssrc.dsl.ObjectLiteral.java

static ObjectLiteral create(ImmutableList<? extends Expression> keys,
        ImmutableList<? extends Expression> values) {
    Preconditions.checkArgument(keys.size() == values.size(), "Mismatch between keys and values.");
    ImmutableList.Builder<Statement> initialStatements = ImmutableList.builder();
    for (Expression key : keys) {
        initialStatements.addAll(key.initialStatements());
    }/*from  w  w w  . ja v  a2  s.  com*/
    for (Expression value : values) {
        initialStatements.addAll(value.initialStatements());
    }
    return new AutoValue_ObjectLiteral(initialStatements.build(), keys, values);
}

From source file:com.amazon.kinesis.streaming.agent.tailing.FileId.java

/**
 * @see #get(BasicFileAttributes)/*  w w w  . j  a  v a 2 s.  co m*/
 */
public static FileId get(Path file) throws IOException {
    if (!Files.exists(file)) {
        return null;
    }
    Preconditions.checkArgument(Files.isRegularFile(file),
            "Can only get ID for real files (no directories and symlinks): " + file);
    BasicFileAttributes attr = Files.readAttributes(file, BasicFileAttributes.class);
    return get(attr);
}