Example usage for com.google.common.base Optional fromNullable

Introduction

In this page you can find the example usage for com.google.common.base Optional fromNullable.

Prototype

public static <T> Optional<T> fromNullable(@Nullable T nullableReference)

Source Link

Document

If nullableReference is non-null, returns an Optional instance containing that reference; otherwise returns Optional#absent .

Usage

From source file:org.locationtech.geogig.osm.internal.log.ReadOSMMappingLogEntry.java

@Override
protected Optional<OSMMappingLogEntry> _call() {
    final File osmMapFolder = command(ResolveOSMMappingLogFolder.class).call();
    File file = new File(osmMapFolder, path);
    OSMMappingLogEntry entry = null;/*w w  w .  j ava 2s . c o  m*/
    if (file.exists()) {
        try {
            synchronized (file.getCanonicalPath().intern()) {
                String line = Files.readFirstLine(file, Charsets.UTF_8);
                entry = OSMMappingLogEntry.fromString(line);
            }
        } catch (IOException e) {
            throw Throwables.propagate(e);
        }
    }
    return Optional.fromNullable(entry);
}

From source file:org.eclipse.epp.internal.logging.aeri.ui.notifications.NewErrorNotification.java

@Override
public String getDescription() {
    StringBuilder b = new StringBuilder();
    Throwable exception = report.getStatus().getException();
    if (exception != null) {

        String message = toShortClassName(exception.getClassName()) + ": "
                + Optional.fromNullable(exception.getMessage()).or("");
        b.append(StringUtils.abbreviate(message, 120));
    }//w w w  .  ja v  a 2s .  com
    b.append("\n\nDo you want to report this error?");
    return b.toString();
}

From source file:org.jage.emas.util.ChainingContext.java

/**
 * Returns an optional next context./*from  w  ww.  j  a  v  a2s.c  o m*/
 *
 * @return an optional next context
 */
public final Optional<ChainingContext> getNextContext() {
    return Optional.fromNullable(next);
}

From source file:net.awairo.mcmod.common.v1.util.LimitedNumber.java

/**
 * ??????????Long????.//from  w  w w.j a v  a 2 s.  co  m
 * 
 * @return Long?{@link LimitedNumber}
 */
public static Builder<Long> ofLong(final Prop prop, final long defaultValue) {
    return new Builder<Long>() {
        {
            current(Optional.fromNullable(Longs.tryParse(prop.getString())).or(defaultValue));
            min(Long.MIN_VALUE);
            max(Long.MAX_VALUE);
            step(1L);
        }

        @Override
        protected LimitedNumber<Long> newInstance(Long current, Long min, Long max, Long step) {
            return new LimitedNumber<Long>(current, min, max, step) {
                @Override
                protected Long incrementValue(Long current, Long step) {
                    // Long???????
                    return current > 0 && Long.MAX_VALUE - current < step ? Long.MAX_VALUE : current + step;
                }

                @Override
                protected Long decrementValue(Long current, Long step) {
                    // Long???????
                    return current < 0 && current - Long.MIN_VALUE < step ? Long.MIN_VALUE : current - step;
                }

                @Override
                protected void updated() {
                    prop.set(current().toString());
                }
            };
        }
    };
}

From source file:ec.nbdemetra.jdbc.DbExplorerUtil.java

@Nonnull
static Optional<DatabaseConnection> findConnection(@Nonnull Node node) {
    DatabaseConnection result = null;//from  ww w  . j  a  v a2s  . co  m
    Node current = node;
    while (current != null && (result = current.getLookup().lookup(DatabaseConnection.class)) == null) {
        current = current.getParentNode();
    }
    return Optional.fromNullable(result);
}

From source file:org.apache.cassandra.cql3.hooks.ExecutionContext.java

public ExecutionContext(QueryState queryState, String queryString, QueryOptions queryOptions) {
    this.queryState = queryState;
    this.queryString = Optional.fromNullable(queryString);
    this.queryOptions = queryOptions;
}

From source file:im.dadoo.teak.biz.bo.impl.DefaultLinkBO.java

@Override
public Optional<LinkPO> findById(long id) {
    return Optional.fromNullable(this.linkDAO.findById(id));
}

From source file:com.spotify.helios.agent.AddExtraHostContainerDecorator.java

@Override
public void decorateHostConfig(final Job job, final Optional<String> dockerVersion,
        final HostConfig.Builder hostConfig) {
    final List<String> hosts = Lists.newArrayList();
    hosts.addAll(this.extraHosts);
    //TODO write better backwards copatiblity
    hosts.addAll(Optional.fromNullable(job.getExtraHosts()).or(Collections.emptySet()));
    hostConfig.extraHosts(hosts);/*from  w  w w  .ja v a2  s. c om*/
}

From source file:org.mayocat.mail.MailTemplate.java

public MailTemplate locale(Locale locale) {
    this.locale = Optional.fromNullable(locale);
    return this;
}

From source file:org.eclipse.buildship.core.workspace.internal.EclipseVmUtil.java

private static Optional<IVMInstall> findRegisteredVM(String version) {
    Optional<IExecutionEnvironment> possibleExecutionEnvironment = findExecutionEnvironment(version);
    if (!possibleExecutionEnvironment.isPresent()) {
        return Optional.absent();
    }/*from  w w w. jav  a 2  s  .com*/

    IExecutionEnvironment executionEnvironment = possibleExecutionEnvironment.get();
    IVMInstall defaultVm = executionEnvironment.getDefaultVM();
    if (defaultVm != null) {
        return Optional.of(defaultVm);
    } else {
        IVMInstall firstVm = Iterables.getFirst(Arrays.asList(executionEnvironment.getCompatibleVMs()), null);
        return Optional.fromNullable(firstVm);
    }
}