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:com.turn.griffin.utils.GriffinConfig.java

public static String getProperty(String propertyName) {
    Preconditions.checkNotNull(propertyName);
    if (properties == null) {
        init();/*from w  w w  . ja  v  a2  s.c o m*/
    }
    return properties.getProperty(propertyName);
}

From source file:com.google.appengine.tools.mapreduce.ConfigurationXmlUtil.java

/**
 * Reconstitutes a Configuration from an XML string.
 *
 * @param serializedConf an XML document in Hadoop configuration format
 * @return the Configuration corresponding to the XML
 *///from  www. j a va2s . co m
public static Configuration getConfigurationFromXml(String serializedConf) {
    Preconditions.checkNotNull(serializedConf);

    try {
        byte[] serializedConfBytes = serializedConf.getBytes("UTF8");
        ByteArrayInputStream serializedConfStream = new ByteArrayInputStream(serializedConfBytes);

        // false makes Configuration not try to read defaults from the filesystem.
        Configuration conf = new Configuration(false);
        conf.addResource(serializedConfStream);
        return conf;
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException("JDK doesn't understand UTF8", e);
    }
}

From source file:com.isotrol.impe3.api.Name.java

/**
 * Returns a new content type with specified id and localized name.
 * @param displayName Display name./*from w  w  w.jav  a  2 s .c om*/
 * @param path Path segment.
 * @return The requested content type.
 */
public static Name of(final String displayName, final String path) {
    Preconditions.checkNotNull(displayName);
    return new Name(displayName, path);
}

From source file:com.visural.common.collection.FluentLists.java

public static <T> T remove(List<T> list, int index) {
    Preconditions.checkNotNull(list);
    index = basicAdjustIndex(index, list);
    return list.remove(index);
}

From source file:com.facebook.buck.parser.PartialGraphFactory.java

/**
 * Creates a PartialGraph via dependency injection.
 * <p>//from  w  w w  . j  a va  2  s .co  m
 * Normally, a PartialGraph is created via factory methods that ensure the integrity of the
 * PartialGraph by construction. This factory is used for tests, so it sidesteps the integrity
 * checks. Therefore, it is the responsibility of the caller to ensure that the graph is a
 * DependencyGraph built from the list of targets.
 */
public static PartialGraph newInstance(DependencyGraph graph, List<BuildTarget> targets) {
    Preconditions.checkNotNull(graph);
    Preconditions.checkNotNull(targets);
    return new PartialGraph(graph, targets);
}

From source file:edu.byu.nlp.math.RealVectors.java

/**
 * Adds vector a to b and stores the results in a.
 * //from w  w  w. j  a  va  2 s.  c o m
 * @throws NullPointerException if a or b are null 
 */
public static void addToSelf(RealVector a, RealVector b) {
    Preconditions.checkNotNull(a);
    Preconditions.checkNotNull(b);
    if (a.getDimension() != b.getDimension()) {
        throw new DimensionMismatchException(b.getDimension(), a.getDimension());
    }

    a.combineToSelf(1.0, 1.0, b);
}

From source file:com.android.builder.core.BootClasspathBuilder.java

@NonNull
public static ImmutableList<File> computeFullBootClasspath(@NonNull IAndroidTarget target,
        @NonNull File annotationsJar) {
    Preconditions.checkNotNull(target);
    Preconditions.checkNotNull(annotationsJar);

    ImmutableList.Builder<File> classpath = ImmutableList.builder();

    for (String p : target.getBootClasspath()) {
        classpath.add(new File(p));
    }//from   w  w  w . java 2s.  c  om

    // add additional libraries if any
    List<IAndroidTarget.OptionalLibrary> libs = target.getAdditionalLibraries();
    for (IAndroidTarget.OptionalLibrary lib : libs) {
        File jar = lib.getJar();
        Verify.verify(jar != null, "Jar missing from additional library %s.", lib.getName());
        classpath.add(jar);
    }

    // add optional libraries if any
    List<IAndroidTarget.OptionalLibrary> optionalLibraries = target.getOptionalLibraries();
    for (IAndroidTarget.OptionalLibrary lib : optionalLibraries) {
        File jar = lib.getJar();
        Verify.verify(jar != null, "Jar missing from optional library %s.", lib.getName());
        classpath.add(jar);
    }

    // add annotations.jar if needed.
    if (target.getVersion().getApiLevel() <= 15) {
        classpath.add(annotationsJar);
    }

    return classpath.build();
}

From source file:io.github.msdk.util.MsSpectrumUtil.java

/**
 * Returns the m/z range of given data points. Can return null if the data
 * point list is empty./*from w w w  .j a  va  2 s  .c  o  m*/
 *
 * @return a {@link com.google.common.collect.Range} object.
 * @param mzValues
 *            an array of double.
 * @param size
 *            a {@link java.lang.Integer} object.
 */
@Nullable
public static Range<Double> getMzRange(@Nonnull double mzValues[], @Nonnull Integer size) {

    // Parameter check
    Preconditions.checkNotNull(mzValues);
    Preconditions.checkNotNull(size);
    Preconditions.checkPositionIndex(size, mzValues.length);

    if (size == 0)
        return null;

    double min = mzValues[0];
    double max = mzValues[size - 1];
    return Range.closed(min, max);
}

From source file:org.janusgraph.hadoop.config.ModifiableHadoopConfiguration.java

public static ModifiableHadoopConfiguration of(ConfigNamespace root, Configuration c) {
    Preconditions.checkNotNull(c);
    return new ModifiableHadoopConfiguration(root, c, Restriction.NONE);
}

From source file:com.google.caliper.memory.Chain.java

static Chain root(Object value) {
    return new Chain(null, Preconditions.checkNotNull(value)) {
        @Override//from w ww. j  a  va  2 s.co  m
        public Class<?> getValueType() {
            return getValue().getClass();
        }
    };
}