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:org.dswarm.graph.delta.match.model.util.CSEntityUtil.java

public static Optional<? extends Collection<ValueEntity>> getValueEntities(
        final Optional<? extends Collection<CSEntity>> csEntities) {

    if (!csEntities.isPresent() || csEntities.get().isEmpty()) {

        return Optional.absent();
    }/* w  w  w  . j a  v  a2  s  . c o m*/

    final Set<ValueEntity> valueEntities = new HashSet<>();

    for (final CSEntity csEntity : csEntities.get()) {

        valueEntities.addAll(csEntity.getValueEntities());
    }

    return Optional.of(valueEntities);
}

From source file:org.dswarm.graph.gdm.utils.NodeTypeUtils.java

public static Optional<NodeType> getNodeType(final Optional<Node> optionalNode,
        final Optional<Boolean> optionalIsType) {

    if (!optionalNode.isPresent()) {

        return Optional.absent();
    }/*from  w w  w .java 2  s. c o m*/

    return getNodeTypeByGDMNodeType(Optional.of(optionalNode.get().getType()), optionalIsType);
}

From source file:com.google.errorprone.ErrorProneVersion.java

/**
 * Loads the Error Prone version.//  www .  j a  v  a 2  s  . com
 *
 * <p>This depends on the Maven build, and will always return {@code Optional.absent()} with
 * other build systems.
 */
public static Optional<String> loadVersionFromPom() {
    try (InputStream stream = ErrorProneVersion.class.getResourceAsStream(PROPERTIES_RESOURCE)) {
        if (stream == null) {
            return Optional.absent();
        }
        Properties mavenProperties = new Properties();
        mavenProperties.load(stream);
        return Optional.of(mavenProperties.getProperty("version"));
    } catch (IOException expected) {
        return Optional.absent();
    }
}

From source file:org.geogit.di.PluginDefaults.java

public PluginDefaults() {
    refs = objects = staging = graph = Optional.absent();
}

From source file:com.ayuget.redface.util.UserUtils.java

/**
 * Ugly method to fetch a user id from stored cookies
 *//* www  .  j  a v a 2  s.c om*/
public static Optional<Integer> getLoggedInUserId(User user, OkHttpClient httpClient) {
    CookieManager cookieManager = (CookieManager) httpClient.getCookieHandler();
    CookieStore cookieStore = cookieManager.getCookieStore();
    for (HttpCookie cookie : cookieStore.getCookies()) {
        if (cookie.getName().equals("md_id")) {
            return Optional.of(Integer.valueOf(cookie.getValue()));
        }
    }

    return Optional.absent();
}

From source file:org.dswarm.graph.rdf.utils.NodeTypeUtils.java

public static Optional<NodeType> getNodeType(final Optional<RDFNode> optionalNode,
        final Optional<Boolean> optionalIsType) {

    if (!optionalNode.isPresent()) {

        return Optional.absent();
    }/*from   w w  w  .  j  a  v  a 2  s.  c  om*/

    final NodeType nodeType;
    final RDFNode node = optionalNode.get();

    if (node.isURIResource()) {

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.Resource;
            } else {

                nodeType = NodeType.TypeResource;
            }
        } else {

            nodeType = NodeType.Resource;
        }
    } else if (node.isAnon()) {

        if (optionalIsType.isPresent()) {

            if (Boolean.FALSE.equals(optionalIsType.get())) {

                nodeType = NodeType.BNode;
            } else {

                nodeType = NodeType.TypeBNode;
            }
        } else {

            nodeType = NodeType.BNode;
        }
    } else if (node.isLiteral()) {

        nodeType = NodeType.Literal;
    } else {

        nodeType = null;
    }

    return Optional.fromNullable(nodeType);
}

From source file:com.github.radium226.common.Either.java

public static <L, R> Either<L, R> right(R right) {
    return new Either(Optional.absent(), Optional.of(right));
}

From source file:com.google.javascript.jscomp.JsCheckerHelper.java

static Optional<String> convertPathToModuleName(String path, Iterable<String> roots) {
    checkArgument(!path.startsWith("/"));
    if (!path.endsWith(".js") && !path.endsWith(".zip")) {
        return Optional.absent();
    }// ww  w . j a v  a  2s  .co  m
    String module = path;
    for (String root : roots) {
        if (module.startsWith(root + "/")) {
            module = module.substring(root.length() + 1);
            break;
        }
    }

    String moduleOrZipName = module.split("!")[0];
    return Optional.of("/" + moduleOrZipName);
}

From source file:dagger2.internal.codegen.InjectionAnnotations.java

static Optional<AnnotationMirror> getScopeAnnotation(Element e) {
    checkNotNull(e);/*w ww . j a v  a2  s.c o  m*/
    ImmutableSet<? extends AnnotationMirror> scopeAnnotations = getScopes(e);
    switch (scopeAnnotations.size()) {
    case 0:
        return Optional.absent();
    case 1:
        return Optional.<AnnotationMirror>of(scopeAnnotations.iterator().next());
    default:
        throw new IllegalArgumentException(e + " was annotated with more than one @Scope annotation");
    }
}

From source file:com.empcraft.xpbank.util.ChunkUtil.java

public static Optional<Chunk> getLoadedChunk(World world, Location loc) {
    Preconditions.checkNotNull(loc);//from   w w  w.  j  a v a2 s  .  c  om
    Optional<Chunk> loadedChunk = Optional.absent();

    final Chunk chunkAt = world.getChunkAt(loc);
    if (chunkAt.isLoaded()) {
        loadedChunk = Optional.of(chunkAt);
    }

    return loadedChunk;
}