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.apache.james.quota.search.Limit.java

public static Limit of(int value) {
    Preconditions.checkArgument(value >= 0, "A limit need to be positive");
    return new Limit(Optional.of(value));
}

From source file:gobblin.kafka.schemareg.KafkaSchemaRegistryFactory.java

@SuppressWarnings("unchecked")
public static KafkaSchemaRegistry getSchemaRegistry(Properties props) {
    Preconditions.checkArgument(
            props.containsKey(KafkaSchemaRegistryConfigurationKeys.KAFKA_SCHEMA_REGISTRY_CLASS),
            "Missing required property " + KafkaSchemaRegistryConfigurationKeys.KAFKA_SCHEMA_REGISTRY_CLASS);

    boolean tryCache = Boolean.parseBoolean(props.getProperty(
            KafkaSchemaRegistryConfigurationKeys.KAFKA_SCHEMA_REGISTRY_CACHE, DEFAULT_TRY_CACHING));

    Class<?> clazz;//from w ww. j  a v a 2 s  .co  m
    try {
        clazz = (Class<?>) Class
                .forName(props.getProperty(KafkaSchemaRegistryConfigurationKeys.KAFKA_SCHEMA_REGISTRY_CLASS));
        KafkaSchemaRegistry schemaRegistry = (KafkaSchemaRegistry) ConstructorUtils.invokeConstructor(clazz,
                props);
        if (tryCache && !schemaRegistry.hasInternalCache()) {
            schemaRegistry = new CachingKafkaSchemaRegistry(schemaRegistry);
        }
        return schemaRegistry;
    } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InvocationTargetException
            | InstantiationException e) {
        log.error("Failed to instantiate " + KafkaSchemaRegistry.class, e);
        throw Throwables.propagate(e);
    }
}

From source file:com.google.uzaygezen.core.BitVectorMath.java

/**
 * Splits the bits from {@code bs} into {@code result} by putting the
 * lowest bits at the end of {@code result} and so on until the highest bits
 * are put at the beginning of {@code result}. This is similar to the big
 * endian representation of numbers, only that each digit has a potentially
 * different size. The bit set length must be equal to {@code
 * sum(elementLengths)}./*from  www . j ava2 s .  co  m*/
 * 
 * @param bs little endian bit set
 * @param result output
 */
public static void split(BitVector bs, BitVector[] result) {
    int sum = 0;
    for (BitVector bv : result) {
        sum += bv.size();
    }
    Preconditions.checkArgument(sum == bs.size(), "size sum does not match");
    int startIndex = 0;
    for (int i = result.length; --i >= 0;) {
        result[i].copyFromSection(bs, startIndex);
        startIndex += result[i].size();
    }
    Preconditions.checkArgument(startIndex >= bs.length(), "bit length is too high");
}

From source file:com.metamx.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");

    if (postAggs != null && !postAggs.isEmpty()) {
        Set<String> combinedAggNames = Sets
                .newHashSet(Lists.transform(aggFactories, new Function<AggregatorFactory, String>() {
                    @Override//from   w  w w .j a  va 2 s .c  om
                    public String apply(@Nullable AggregatorFactory input) {
                        return input.getName();
                    }
                }));

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

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

From source file:co.cask.cdap.data2.util.TableId.java

public static TableId from(Id.Namespace namespaceId, String tableName) {
    Preconditions.checkArgument(tableName != null, "Table name should not be null.");
    // Id.Namespace already checks for non-null namespace
    return new TableId(namespaceId, tableName);
}

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

/**
 * <p>fromResponse.</p>//from   w  w  w . j a  va  2 s  .  c  o m
 *
 * @param response a T object.
 * @param <T> a T object.
 * @return a {@link com.google.cloud.bigtable.grpc.scanner.ResultQueueEntry} object.
 */
public static <T> ResultQueueEntry<T> fromResponse(T response) {
    Preconditions.checkArgument(response != null, "Response may not be null");
    return new ResponseResultQueueEntry<T>(response);
}

From source file:org.haiku.haikudepotserver.dataobjects.RepositorySource.java

public static RepositorySource get(ObjectContext context, ObjectId objectId) {
    Preconditions.checkArgument(null != context, "the context must be supplied");
    Preconditions.checkArgument(null != objectId, "the objectId must be supplied");
    Preconditions.checkArgument(objectId.getEntityName().equals(RepositorySource.class.getSimpleName()),
            "the objectId must be targetting RepositorySource");
    return SelectById.query(RepositorySource.class, objectId).sharedCache().selectOne(context);
}

From source file:webindex.data.fluo.PageLoader.java

public static PageLoader updatePage(Page page) {
    Preconditions.checkArgument(!page.isEmpty(), "Page cannot be empty");
    PageLoader update = new PageLoader();
    update.action = Action.UPDATE;
    update.page = page;/*from  w  ww  .j  ava 2s  .  c  om*/
    return update;
}

From source file:org.apache.james.jmap.model.BlobId.java

public static BlobId of(String rawValue) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(rawValue), "'rawValue' is mandatory");
    return new BlobId(rawValue);
}

From source file:org.apache.james.mailbox.store.mail.model.impl.Cid.java

public static Cid from(String cidAsString) {
    Preconditions.checkNotNull(cidAsString);
    Preconditions.checkArgument(!cidAsString.isEmpty(), "'cidAsString' is mandatory");
    return new Cid(normalizedCid(cidAsString));
}