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.palantir.lock.AtlasRowLockDescriptor.java

/** Returns a {@code LockDescriptor} instance for the given table and row. */
public static LockDescriptor of(String tableName, byte[] rowName) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(tableName));
    Preconditions.checkNotNull(rowName);
    byte[] tableBytes = tableName.getBytes();
    byte[] bytes = new byte[tableBytes.length + 1 + rowName.length];
    System.arraycopy(tableBytes, 0, bytes, 0, tableBytes.length);
    System.arraycopy(rowName, 0, bytes, tableBytes.length + 1, rowName.length);
    return new LockDescriptor(bytes);
}

From source file:biz.ganttproject.impex.csv.SpreadsheetFormat.java

public static SpreadsheetFormat getSpreadsheetFormat(String extension) {
    extension = Preconditions.checkNotNull(extension);
    for (SpreadsheetFormat format : values()) {
        if (format.getExtension().equalsIgnoreCase(extension)) {
            return format;
        }//w  w w  .j a  v a  2s .c o m
    }
    throw new IllegalArgumentException("No enum constant extension: " + extension);
}

From source file:io.pravega.controller.store.stream.StreamProperty.java

public static <T> StreamProperty<T> complete(final T complete) {
    Preconditions.checkNotNull(complete);

    return new StreamProperty<>(complete, false);
}

From source file:com.minlia.cloud.framework.test.common.web.util.HTTPLinkHeaderUtil.java

/**
 * ex. <br>/*from   w w  w.  j  a  v  a 2 s  .  c o m*/
 * https://api.github.com/users/steveklabnik/gists?page=2>; rel="next", <https://api.github.com/users/steveklabnik/gists?page=3>; rel="last"
 */
public static List<String> extractAllURIs(final String linkHeader) {
    Preconditions.checkNotNull(linkHeader);

    final List<String> linkHeaders = Lists.newArrayList();
    final String[] links = linkHeader.split(", ");
    for (final String link : links) {
        final int positionOfSeparator = link.indexOf(';');
        linkHeaders.add(link.substring(1, positionOfSeparator - 1));
    }

    return linkHeaders;
}

From source file:com.google.devtools.build.xcode.util.Mapping.java

/**
 * Returns the value mapped to the given key for a map. If the mapping is not present, an absent
 * {@code Optional} is returned.//from   w  ww . java2s  .co  m
 * @throws NullPointerException if the map or key argument is null
 */
public static <K, V> Optional<V> of(Map<K, V> map, K key) {
    Preconditions.checkNotNull(key);
    return Optional.fromNullable(map.get(key));
}

From source file:cz.cuni.mff.ms.brodecva.botnicek.ide.utils.swing.graphics.Rendering.java

/**
 * Pednastav vykreslovn pltna.//  www .  j  a  va 2 s .c o m
 * 
 * @param graphics2d
 *            pltno pro kreslen
 */
public static void preset(final Graphics2D graphics2d) {
    Preconditions.checkNotNull(graphics2d);

    graphics2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    graphics2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION,
            RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
    graphics2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
            RenderingHints.VALUE_FRACTIONALMETRICS_ON);
    graphics2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
    graphics2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    graphics2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE);
    graphics2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
}

From source file:edu.byu.nlp.stats.SymmetricDirichletOptimizationHelper.java

public static SymmetricDirichletOptimizationHelper newHelper(double[][] data) {
    Preconditions.checkNotNull(data);
    Preconditions.checkArgument(data.length > 0);

    double sum = 0.0;
    for (double[] theta : data) {
        sum += DoubleArrays.sum(theta);/*from   w ww.java 2s .  co  m*/
    }
    return new SymmetricDirichletOptimizationHelper(data[0].length, data.length, sum);
}

From source file:com.cloudera.oryx.common.lang.JVMUtils.java

/**
 * Adds a shutdown hook that try to call {@link Closeable#close()} on the given argument
 * at JVM shutdown.//from  w ww  . jav  a  2 s.c o  m
 *
 * @param closeable thing to close
 */
public static void closeAtShutdown(Closeable closeable) {
    Preconditions.checkNotNull(closeable);
    synchronized (closeAtShutdown) {
        if (closeAtShutdown.isEmpty()) {
            Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
                @Override
                public void run() {
                    synchronized (closeAtShutdown) {
                        for (Closeable c : closeAtShutdown) {
                            IOUtils.closeQuietly(c);
                        }
                    }
                }
            }));
        }
        closeAtShutdown.push(closeable);
    }
}

From source file:org.opendaylight.bgpcep.programming.tunnel.TunnelProgrammingUtil.java

public static InstanceIdentifier<Link> linkIdentifier(final InstanceIdentifier<Topology> topology,
        final BaseTunnelInput input) {
    Preconditions.checkNotNull(input.getLinkId());
    return topology.child(Link.class, new LinkKey(input.getLinkId()));
}

From source file:com.palantir.lock.AtlasCellLockDescriptor.java

/** Returns a {@code LockDescriptor} instance for the given table, row, and column. */
public static LockDescriptor of(String tableName, byte[] rowName, byte[] colName) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(tableName));
    Preconditions.checkNotNull(rowName);
    Preconditions.checkNotNull(colName);
    byte[] tableBytes = tableName.getBytes();
    byte[] bytes = new byte[tableBytes.length + 1 + rowName.length + 1 + colName.length];
    System.arraycopy(tableBytes, 0, bytes, 0, tableBytes.length);
    System.arraycopy(rowName, 0, bytes, tableBytes.length + 1, rowName.length);
    System.arraycopy(colName, 0, bytes, tableBytes.length + 1 + rowName.length + 1, colName.length);
    return new LockDescriptor(bytes);
}