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:com.facebook.swift.parser.model.IntegerEnumField.java

public IntegerEnumField(String name, Long value) {
    this.name = checkNotNull(name, "name");
    this.value = Optional.fromNullable(value);
}

From source file:org.robotninjas.concurrent.ConsumerDecorator.java

private ConsumerDecorator(Consumer<V> success, Consumer<Throwable> failure) {
    this.success = Optional.fromNullable(success);
    this.failure = Optional.fromNullable(failure);
}

From source file:com.github.fge.grappa.support.Chars.java

public static String escape(char c) {
    return Optional.fromNullable(ESCAPE_MAP.get(c)).or(String.valueOf(c));
}

From source file:org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource.java

public static SourceIdentifier identifierFromFilename(final String name) {
    checkArgument(name.endsWith(YangConstants.RFC6020_YANG_FILE_EXTENSION),
            "Filename %s does not have a .yang extension", name);

    final String baseName = name.substring(0,
            name.length() - YangConstants.RFC6020_YANG_FILE_EXTENSION.length());
    final Entry<String, String> parsed = YangNames.parseFilename(baseName);
    return RevisionSourceIdentifier.create(parsed.getKey(), Optional.fromNullable(parsed.getValue()));
}

From source file:org.opendaylight.netconf.cli.SchemaContextRegistry.java

public synchronized Optional<SchemaContext> getRemoteSchemaContext() {
    return Optional.fromNullable(remoteSchemaContext);
}

From source file:org.raml.jaxrs.model.HttpVerb.java

/**
 * Returns the corresponding http verb.//from  w  ww  . j av  a 2 s .  co m
 *
 * Verbs are associated with their {@link #getString()} value. Therefore, the matching is case sensitive.
 *
 * @param httpMethod the method to pair
 * @return The corresponding http verb, or {@link Optional#absent()} if there are no matches.
 */
public static Optional<HttpVerb> fromString(String httpMethod) {
    return Optional.fromNullable(VERBS_BY_STRINGS.get(httpMethod));
}

From source file:google.registry.tldconfig.idn.IdnLabelValidator.java

/**
 * Returns name of first matching {@link IdnTable} if domain label is valid for the given TLD.
 *
 * <p>A label is valid if it is considered valid by at least one configured IDN table for that
 * TLD. If no match is found, an absent value is returned.
 *///  w w w. ja  va  2 s .com
public static Optional<String> findValidIdnTableForTld(String label, String tld) {
    String unicodeString = Idn.toUnicode(label);
    for (IdnTableEnum idnTable : Optional.fromNullable(idnTableListsPerTld.get(tld)).or(DEFAULT_IDN_TABLES)) {
        if (idnTable.getTable().isValidLabel(unicodeString)) {
            return Optional.of(idnTable.getTable().getName());
        }
    }
    return Optional.absent();
}

From source file:io.macgyver.ssh.PubKeyCredentials.java

public PubKeyCredentials(String username, File pkf) {
    this.username = username;
    this.privateKey = Optional.fromNullable(pkf);
}

From source file:com.facebook.swift.parser.model.ContainerType.java

public ContainerType(String cppType, List<TypeAnnotation> annotations) {
    this.cppType = Optional.fromNullable(cppType);
    this.annotations = ImmutableList.copyOf(checkNotNull(annotations, "annotations"));
}

From source file:org.mayocat.jackson.OptionalStringDeserializer.java

@Override
public Optional<String> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
        throws IOException, JsonProcessingException {
    if (Strings.isNullOrEmpty(jsonParser.getValueAsString())) {
        return Optional.absent();
    }/*from w  w w .j a  va2s . c  o m*/
    return Optional.fromNullable(jsonParser.getValueAsString());
}