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)

Source Link

Document

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

Usage

From source file:cz.cuni.mff.ms.brodecva.botnicek.ide.utils.data.Comparisons.java

/**
 * Zjist, zda-li jsou prvky navzjem rzn.
 * //from   w ww.j  av a2 s  .co  m
 * @param elements
 *            prvky
 * @return zda-li jsou vechny prvky navzjem rzn
 */
@SafeVarargs
public static <E> boolean allDifferent(final E... elements) {
    Preconditions.checkNotNull(elements);

    return ImmutableSet.copyOf(elements).size() == elements.length;
}

From source file:org.opendaylight.controller.netconf.cli.commands.output.OutputDefinition.java

public static OutputDefinition fromOutput(final ContainerSchemaNode output) {
    Preconditions.checkNotNull(output);
    return new OutputDefinition(output.getChildNodes());
}

From source file:us.eharning.atomun.mnemonic.spi.bip0039.BIP0039MnemonicIndexGenerator.java

/**
 * Take the input entropy and output an array of word indices.
 *
 * @param entropy// w  w w  .  j a v a 2  s  .  co  m
 *         generated entropy to process.
 *
 * @return array of integer indices into dictionary.
 */
@Nonnull
public static int[] generateIndices(@Nonnull byte[] entropy) {
    Preconditions.checkNotNull(entropy);
    byte[] joined = new byte[entropy.length + 256 / 8];

    System.arraycopy(entropy, 0, joined, 0, entropy.length);
    BIP0039MnemonicUtility.sha256digest(joined, 0, entropy.length, joined, entropy.length);

    /* Convert the length to bits for purpose of BIP0039 specification match-up */
    int entropyBitCount = entropy.length * 8;
    int checksumBitCount = entropyBitCount / 32;
    int totalBitCount = entropyBitCount + checksumBitCount;
    int mnemonicSentenceLength = totalBitCount / 11;

    BitReader bitReader = new ByteArrayBitReader(joined);

    int[] indexValues = new int[mnemonicSentenceLength];
    for (int i = 0; i < mnemonicSentenceLength; i++) {
        int index = bitReader.read(11);
        indexValues[i] = index;
    }
    return indexValues;
}

From source file:edu.byu.nlp.classify.NaiveBayesClassifier.java

public static NaiveBayesClassifier newClassifier(double[] logPOfY, double[] logPOfXGivenY, boolean copy) {
    Preconditions.checkNotNull(logPOfY);
    Preconditions.checkNotNull(logPOfXGivenY);
    Preconditions.checkArgument(logPOfXGivenY.length % logPOfY.length == 0);

    if (copy) {/*from w w  w.ja  v a 2s .  c o  m*/
        logPOfY = logPOfY.clone();
        logPOfXGivenY = logPOfXGivenY.clone();
    }
    return new NaiveBayesClassifier(logPOfY, logPOfXGivenY);
}

From source file:com.facebook.buck.java.classes.FileLikes.java

public static String getFileNameWithoutClassSuffix(FileLike fileLike) {
    Preconditions.checkNotNull(fileLike);
    String name = fileLike.getRelativePath();
    return name.substring(0, name.length() - CLASS_NAME_SUFFIX.length());
}

From source file:xml.entity.mutableelement.Elements.java

/**
 * Match elements by name.//from w ww.  j  ava 2  s  . co  m
 */
public static Predicate<Element> byName(@Nonnull final String name) {
    Preconditions.checkNotNull(name);
    return new Predicate<Element>() {

        @Override
        public boolean apply(@Nonnull final Element input) {
            return name.equals(input.name());
        }

        @Override
        public String toString() {
            return name;
        }
    };
}

From source file:com.google.template.soy.types.ListType.java

public static ListType of(SoyType elementType) {
    Preconditions.checkNotNull(elementType);
    return new ListType(elementType);
}

From source file:com.cloudera.impala.catalog.HiveStorageDescriptorFactory.java

/**
 * Creates and returns a Hive StoreDescriptor for the given FileFormat and RowFormat.
 * Currently supports creating StorageDescriptors for Parquet, Text, Sequence, and
 * RC file.//www  .  j  ava 2  s  .  c o m
 * TODO: Add support for HBase
 */
public static StorageDescriptor createSd(THdfsFileFormat fileFormat, RowFormat rowFormat) {
    Preconditions.checkNotNull(fileFormat);
    Preconditions.checkNotNull(rowFormat);

    StorageDescriptor sd = null;
    switch (fileFormat) {
    case PARQUET:
        sd = createParquetFileSd();
        break;
    case RC_FILE:
        sd = createRcFileSd();
        break;
    case SEQUENCE_FILE:
        sd = createSequenceFileSd();
        break;
    case TEXT:
        sd = createTextSd();
        break;
    case AVRO:
        sd = createAvroSd();
        break;
    default:
        throw new UnsupportedOperationException("Unsupported file format: " + fileFormat);
    }

    if (rowFormat.getFieldDelimiter() != null) {
        sd.getSerdeInfo().putToParameters("serialization.format", rowFormat.getFieldDelimiter());
        sd.getSerdeInfo().putToParameters("field.delim", rowFormat.getFieldDelimiter());
    }
    if (rowFormat.getEscapeChar() != null) {
        sd.getSerdeInfo().putToParameters("escape.delim", rowFormat.getEscapeChar());
    }
    if (rowFormat.getLineDelimiter() != null) {
        sd.getSerdeInfo().putToParameters("line.delim", rowFormat.getLineDelimiter());
    }
    return sd;
}

From source file:org.trancecode.collection.TcSets.java

public static <T> ImmutableSet<T> immutableSet(final Iterable<T> set, final T element) {
    Preconditions.checkNotNull(set);
    Preconditions.checkNotNull(element);

    if (set instanceof Set && ((Set<?>) set).contains(element)) {
        return ImmutableSet.copyOf(set);
    }/*from   w  ww. j a  va2  s.c o  m*/

    final Builder<T> builder = ImmutableSet.builder();
    return builder.addAll(set).add(element).build();
}

From source file:org.eclipse.buildship.core.util.file.RelativePathUtils.java

/**
 * Calculates the relative path from a base to a target path.
 *
 * @param base the base path to make the target path relative to
 * @param target the target file to which the relative path is calculated
 * @return the relative path from the base to the target location
 * @throws NullPointerException if an argument is {@code null}
 * @throws IllegalArgumentException if an argument does not denote an absolute path
 *///from w w w .  j  a  v a  2s . c o m
public static IPath getRelativePath(IPath base, IPath target) {
    Preconditions.checkNotNull(base);
    Preconditions.checkNotNull(target);
    Preconditions.checkArgument(base.isAbsolute());
    Preconditions.checkArgument(target.isAbsolute());

    return target.makeRelativeTo(base);
}