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

Introduction

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

Prototype

public static <T> Optional<T> absent()

Source Link

Document

Returns an Optional instance with no contained reference.

Usage

From source file:pl.surreal.finance.transaction.auth.UserDBAuthenticator.java

@Override
public Optional<User> authenticate(BasicCredentials basicCredentials) throws AuthenticationException {
    java.util.Optional<User> user = userDAO.findById(basicCredentials.getUsername());
    if (user.isPresent()) {
        if (user.get().getSecret().compareTo(basicCredentials.getPassword()) == 0) {
            return Optional.of(user.get());
        }//ww  w. ja va  2 s .c o m
    }
    return Optional.absent();
}

From source file:com.google.template.soy.jbcsrc.api.CompiledTemplates.java

/** Returns the strict content type of the template. */
public Optional<ContentKind> getTemplateContentKind(String name) {
    TemplateMetadata meta = getTemplateMetadata(name);
    String contentKind = meta.contentKind();
    if (contentKind.isEmpty()) {
        return Optional.absent();
    }//from  w ww  .  j  av  a  2 s . co  m
    return Optional.of(ContentKind.valueOf(contentKind));
}

From source file:ninja.thymeleaf.template.TemplateEngineThymeleafI18nMessageResolver.java

@Override
public MessageResolution resolveMessage(Arguments arguments, String key, Object[] messageParameters) {
    Locale locale = null;//  ww w.j a v a2s.  c o m
    if (arguments != null) {
        locale = arguments.getContext().getLocale();
    }

    Optional<String> lang = Optional.absent();
    if (locale != null) {
        // to conform to rfc5646 and BCP 47
        lang = Optional.of(locale.toString().replace('_', '-'));
    }

    Optional<String> i18nMessage = Optional.absent();
    i18nMessage = messages.get(key, lang, messageParameters);

    if (!i18nMessage.isPresent()) {
        return null;
    }

    return new MessageResolution(i18nMessage.or(""));
}

From source file:com.publicuhc.pluginframework.util.YamlUtil.java

/**
 * Attempts to pull a Yaml file from the JAR
 *
 * @param path the path to check for//from   ww  w. j  a  va  2 s  .c om
 * @param loader the classloader to look in
 * @return optional. Present if found, null if not
 *
 * @throws IOException
 * @throws InvalidConfigurationException if the file can't be parsed
 */
public static Optional<YamlConfiguration> loadYamlFromJAR(String path, ClassLoader loader)
        throws IOException, InvalidConfigurationException {
    Validate.notNull(path, "Path to file cannot be null");

    URL url = loader.getResource(path);

    if (url == null) {
        return Optional.absent();
    }

    StringBuilder builder = new StringBuilder();
    CharStreams.copy(Resources.newReaderSupplier(url, Charsets.UTF_8), builder);

    return Optional.of(loadYamlFromString(builder.toString()));
}

From source file:gobblin.data.management.copy.replication.CopyRouteGeneratorBase.java

/**
 * for push mode, there is no optimization
 *//*from   w  w w . j  av  a  2 s.  c  om*/
@Override
public Optional<List<CopyRoute>> getPushRoutes(ReplicationConfiguration rc, EndPoint copyFrom) {
    if (rc.getCopyMode() == ReplicationCopyMode.PULL)
        return Optional.absent();

    DataFlowTopology topology = rc.getDataFlowToplogy();
    List<DataFlowTopology.DataFlowPath> paths = topology.getDataFlowPaths();

    for (DataFlowTopology.DataFlowPath p : paths) {
        List<CopyRoute> routes = p.getCopyRoutes();
        if (routes.isEmpty()) {
            continue;
        }

        if (routes.get(0).getCopyFrom().equals(copyFrom)) {
            return Optional.of(routes);
        }
    }
    return Optional.absent();
}

From source file:com.facebook.buck.cxx.DefaultPreprocessor.java

@Override
public Optional<ImmutableList<String>> getFlagsForColorDiagnostics() {
    return Optional.absent();
}

From source file:org.opendaylight.netconf.impl.osgi.NetconfMonitoringServiceImpl.java

public NetconfMonitoringServiceImpl(NetconfOperationServiceFactory opProvider) {
    this(opProvider, Optional.absent(), 0);
}

From source file:org.apache.mailet.base.MailetPipelineLogging.java

private static Optional<Logger> getLogger(Mailet mailet) {
    MailetConfig mailetConfig = mailet.getMailetConfig();
    if (mailetConfig == null) {
        return Optional.absent();
    }//ww w.java  2 s .c o  m
    MailetContext mailetContext = mailetConfig.getMailetContext();
    if (mailetContext == null) {
        return Optional.absent();
    }
    return Optional.fromNullable(mailetContext.getLogger());
}

From source file:org.verdictdb.core.sqlobject.AbstractRelation.java

public void clearAliasName() {
    aliasName = Optional.absent();
}

From source file:com.github.nbyl.xfdcontrol.service.status.StatusDispatcher.java

public StatusDispatcher() {
    this.lastStatus = Optional.absent();
}