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.terasology.monitoring.ChunkMonitor.java

private static synchronized ChunkMonitorEntry registerChunk(ChunkImpl chunk) {
    Preconditions.checkNotNull(chunk, "The parameter 'chunk' must not be null");
    final Vector3i pos = chunk.getPos();
    ChunkMonitorEntry entry = CHUNKS.get(pos);
    if (entry == null) {
        entry = new ChunkMonitorEntry(pos);
        CHUNKS.put(pos, entry);/*w  w w.  j  a  v  a  2s.  com*/
    }
    entry.addChunk(chunk);
    return entry;
}

From source file:com.google.security.zynamics.binnavi.Gui.SettingsDialog.CHintCreator.java

/**
 * Adds a hint icon to a component./*from   w ww . j a  v  a 2s  . c  o m*/
 * 
 * @param component The component the hint icon is added to.
 * @param message The message shown by the hint icon when the cursor hovers over it.
 * 
 * @return The new component that contains both the passed component and the hint icon.
 */
public static Component createHintPanel(final Component component, final String message) {
    Preconditions.checkNotNull(component, "IE01256: Component argument can not be null");

    Preconditions.checkNotNull(message, "IE01257: Message argument can not be null");

    final JPanel panel = new JPanel(new BorderLayout());

    panel.add(component, BorderLayout.CENTER);

    final JHintIcon hintPopup = new JHintIcon(message);
    hintPopup.setBorder(new EmptyBorder(0, 3, 0, 0));
    panel.add(hintPopup, BorderLayout.EAST);

    return panel;
}

From source file:com.addthis.cronus.CronParser.java

static String print(CronPattern pattern) {
    Preconditions.checkNotNull(pattern, "pattern argument must be non-null");
    List<String> components = new ArrayList<>();
    TimePeriod[] periods = TimePeriod.values();
    for (int i = 0; i < periods.length; i++) {
        TimePeriod period = periods[i];//from  w w w . j  a  v a  2s  .  c  o m
        Interval interval = pattern.getInterval(period);
        if (interval.isFull()) {
            components.add("*");
        } else {
            List<String> sections = new ArrayList<>();
            int current = period.min;
            while (current <= period.max) {
                int start, end;
                while (current <= period.max && !interval.test(current)) {
                    current++;
                }
                if (current > period.max) {
                    break;
                }
                start = current;
                while (current <= period.max && interval.test(current)) {
                    current++;
                }
                end = current - 1;
                if (start == end) {
                    sections.add(Integer.toString(start));
                } else {
                    sections.add(start + "-" + end);
                }
            }
            components.add(COMMA_JOINER.join(sections));
        }
    }
    return SPACE_JOINER.join(components);
}

From source file:com.google.security.zynamics.binnavi.API.reil.ReilHelpers.java

/**
 * Determines whether a given REIL instruction is a function call.
 *
 * @param instruction The instruction to check.
 *
 * @return True, if the instruction is a function call. False, otherwise.
 *///w  w  w .j  a  v a 2  s  . com
public static boolean isFunctionCall(final ReilInstruction instruction) {
    Preconditions.checkNotNull(instruction, "Error: Instruction argument can not be null");

    return com.google.security.zynamics.reil.ReilHelpers.isFunctionCall(instruction.getNative());
}

From source file:org.apache.mahout.common.IOUtils.java

public static void quietClose(Closeable... closeables) {
    Preconditions.checkNotNull(closeables, "Closables cannot be null");
    for (Closeable closeable : closeables) {
        if (closeable != null) {
            try {
                closeable.close();/*from  ww  w.j a  v a 2  s  .  c  om*/
            } catch (IOException ioe) {
                log.warn("Unexpected exception while closing; continuing", ioe);
            }
        }
    }
}

From source file:org.apache.usergrid.persistence.collection.mvcc.entity.MvccValidationUtils.java

/**
 * Verify the version is correct.  Also verifies the contained entity
 */// ww  w  .  j  a  v  a  2 s  . c  o m
public static void verifyMvccEntityWithEntity(MvccEntity entity) {

    Preconditions.checkNotNull(entity.getEntity().isPresent(), "Entity is required");
    verifyVersion(entity.getVersion());
    verifyMvccEntityOptionalEntity(entity);
}

From source file:com.cloudbees.mail.FreemarkerUtils.java

/**
 * @param rootMap      root node of the freemarker datamodel.
 * @param templatePath classpath classpath path of the template (e.g. "/my-template.ftl")
 * @return generated file//from ww  w  .j a  va2  s  .  co m
 */
@SuppressWarnings("unchecked")
@Nonnull
public static String generate(@Nullable Map<String, ? extends Object> rootMap, @Nonnull String templatePath) {
    Preconditions.checkNotNull(templatePath, "'templatePath' can NOT be null");
    rootMap = (Map<String, Object>) Objects.firstNonNull(rootMap, Collections.emptyMap());

    try {
        Configuration cfg = new Configuration();
        cfg.setClassForTemplateLoading(FreemarkerUtils.class, "/");

        Template template = cfg.getTemplate(templatePath);
        Writer out = new StringWriter();
        template.process(rootMap, out);
        return out.toString();
    } catch (IOException e) {
        throw Throwables.propagate(e);
    } catch (TemplateException e) {
        throw Throwables.propagate(e);
    }
}

From source file:io.crate.core.collections.MapComparator.java

public static <K, V> int compareMaps(Map<K, V> m1, Map<K, V> m2) {
    Preconditions.checkNotNull(m1, "map is null");
    Preconditions.checkNotNull(m2, "map is null");
    int sizeCompare = Integer.compare(m1.size(), m2.size());
    if (sizeCompare != 0)
        return sizeCompare;

    for (Map.Entry<K, V> entry : m1.entrySet()) {
        V thisValue = entry.getValue();/*  w  ww .ja  v a  2s.  c om*/
        V otherValue = m2.get(entry.getKey());
        if (thisValue == null) {
            if (otherValue != null) {
                return 1;
            } else {
                continue;
            }
        }
        if (!thisValue.equals(otherValue)) {
            if (otherValue == null) {
                return -1;
            }
            if (!thisValue.getClass().equals(otherValue.getClass())) {
                DataType leftType = DataTypes.guessType(thisValue);
                int cmp = leftType.compareValueTo(thisValue, leftType.value(otherValue));
                if (cmp == 0) {
                    continue;
                }
                return cmp;
            }
            return 1;
        }
    }
    return 0;
}

From source file:fr.norad.visuwall.providers.hudson.helper.HudsonXmlHelper.java

private static void checkBuild(Build build) {
    Preconditions.checkNotNull(build, "build is mandatory");
}

From source file:azkaban.crypto.Version.java

/**
 * Provides Version enum based on version String
 * @param ver Version String//from w  w w .ja  v a  2 s.  c o m
 * @return
 */
public static Version fromVerString(String ver) {
    Version result = REVERSE_ENTRIES.get(ver);
    Preconditions.checkNotNull(ver, "Invalid version " + ver);
    return result;
}