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, @Nullable Object errorMessage)

Source Link

Document

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

Usage

From source file:org.retrostore.ui.JspUtils.java

public static void writeResponse(ServletContext context, HttpServletRequest request,
        HttpServletResponse response, String path, TemplateModel model) throws ServletException, IOException {
    Preconditions.checkNotNull(context, "Context necessary");
    Preconditions.checkNotNull(request, "RequestData necessary");
    Preconditions.checkNotNull(response, "Response necessary");
    Preconditions.checkNotNull(path, "Path necessary");

    if (model == null) {
        model = new TemplateModel();
    }/*from w  ww .  ja va 2s.  com*/
    request.setAttribute("model", model.getData());
    context.getRequestDispatcher(path).forward(request, response);
}

From source file:com.facebook.presto.sql.analyzer.Field.java

public static Field newUnqualified(String name, Type type) {
    Preconditions.checkNotNull(name, "name is null");
    Preconditions.checkNotNull(type, "type is null");

    return new Field(Optional.empty(), Optional.of(name), type, false);
}

From source file:works.chatterbox.chatterbox.events.ChatterboxEvent.java

protected static HandlerList getHandlerList(@NotNull final String name) {
    Preconditions.checkNotNull(name, "name was null");
    return ChatterboxEvent.handlerLists.getUnchecked(name);
}

From source file:talkeeg.httpserver.HandlerPrefixLenFunctions.java

public static Function<String, Integer> from(final String prefix) {
    Preconditions.checkNotNull(prefix, "prefix is null");
    return new Function<String, Integer>() {
        @Override/*from  w  w w  .jav  a 2 s .co m*/
        public Integer apply(String input) {
            return input.startsWith(prefix) ? prefix.length() : -1;
        }
    };
}

From source file:com.github.jeluard.guayaba.base.Pairs.java

/**
 * @param <U>/*  w  w w. jav  a2  s  .c om*/
 * @param <V>
 * @param pairs
 * @return a {@link Map} composed of all {@code pairs} element
 */
public static <U, V> Map<U, V> toMap(final Collection<Pair<U, V>> pairs) {
    Preconditions.checkNotNull(pairs, "null pairs");

    final Map<U, V> map = new HashMap<U, V>(pairs.size());
    for (final Pair<U, V> pair : pairs) {
        map.put(pair.first, pair.second);
    }
    return map;
}

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

private static <T> Optional<T> intNoneOrOne(Iterator<T> iterator) {
    Preconditions.checkNotNull(iterator, "iterator is null");
    if (!iterator.hasNext()) {
        return Optional.absent();
    }/*from w  ww  .ja  v a 2  s.  co  m*/
    return Optional.of(iterator.next());
}

From source file:com.github.jcustenborder.kafka.connect.utils.config.validators.Validators.java

/**
 * Method will return a validator that will accept a blank string. Any other value will be passed
 * on to the supplied validator./* ww w.  ja v  a 2  s  .  com*/
 *
 * @param validator Validator to test non blank values with.
 * @return
 */
public static Validator blankOr(Validator validator) {
    Preconditions.checkNotNull(validator, "validator cannot be null.");
    return BlankOrValidator.of(validator);
}

From source file:com.google.security.zynamics.binnavi.Gui.GraphWindows.Implementations.CGraphFreezer.java

/**
 * Toggles the state of Frozen/Editable in the graph.
 *
 * @param graph Graph to be frozen or unfrozen.
 *//*w w  w  . j a va2  s  .  c  om*/
public static void toogleProximityFrozen(final ZyGraph graph) {
    Preconditions.checkNotNull(graph, "IE01739: Graph argument can not be null");

    graph.getSettings().getProximitySettings().setProximityBrowsingFrozen(
            !graph.getSettings().getProximitySettings().getProximityBrowsingFrozen());
}

From source file:tv.icntv.grade.film.utils.ReflectionUtils.java

public static Object newInstance(String className)
        throws ClassNotFoundException, IllegalAccessException, InstantiationException {
    Preconditions.checkNotNull(null != className, "class name null");

    return classLoader.loadClass(className).newInstance();

}

From source file:com.google.security.zynamics.binnavi.Gui.GraphWindows.Implementations.CGraphMagnifier.java

/**
 * Toggles the magnifying mode of a graph.
 *
 * @param graph The graph where the magnifying mode is toggled.
 *//*  w ww .j av  a 2 s  .c  om*/
public static void toogleMagnifyingGlass(final ZyGraph graph) {
    Preconditions.checkNotNull(graph, "IE01749: Graph argument can not be null");

    graph.getSettings().getDisplaySettings()
            .setMagnifyingGlassMode(!graph.getSettings().getDisplaySettings().getMagnifyingGlassMode());
}