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.everit.json.schema.internal.EmailFormatValidator.java

@Override
public Optional<String> validate(final String subject) {
    if (EmailValidator.getInstance(false, true).isValid(subject)) {
        return Optional.absent();
    }// w  ww .  j  ava 2 s  .  c o  m
    return Optional.of(String.format("[%s] is not a valid email address", subject));
}

From source file:org.sonar.server.computation.scm.DbScmInfo.java

static Optional<ScmInfo> create(Component component, Iterable<DbFileSources.Line> lines) {
    LineToChangeset lineToChangeset = new LineToChangeset();
    List<Changeset> lineChangesets = from(lines).transform(lineToChangeset).filter(notNull()).toList();
    if (lineChangesets.isEmpty()) {
        return Optional.absent();
    }//from  w ww.j  a  va 2s .c o m
    checkState(!lineToChangeset.isEncounteredLineWithoutScmInfo(), format(
            "Partial scm information stored in DB for component '%s'. Not all lines have SCM info. Can not proceed",
            component));
    return Optional.<ScmInfo>of(new DbScmInfo(new ScmInfoImpl(lineChangesets)));
}

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

Optional<Diagnostic.Kind> diagnosticKind() {
    switch (this) {
    case ERROR:/*w ww. ja v a2s  .c om*/
        return Optional.of(Diagnostic.Kind.ERROR);
    case WARNING:
        return Optional.of(Diagnostic.Kind.WARNING);
    default:
        return Optional.absent();
    }
}

From source file:org.opendaylight.controller.config.util.capability.BasicCapability.java

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

From source file:org.stilavia.service.zalando.RequestChain.java

public RequestChain(RequestContext context, String path) {
    Preconditions.checkNotNull(context);
    this.context = context;
    this.path = path;
    this.parent = Optional.absent();
}

From source file:extrabiomes.module.amica.thermalexpansion.ThermalExpansionAPI.java

ThermalExpansionAPI() {
    try {//  w ww  . j a  va2  s .  c om
        final Class cls = Class.forName("thermalexpansion.api.crafting.CraftingHelpers");
        addSawmillLogToPlankRecipe = Optional
                .fromNullable(cls.getMethod("addSawmillLogToPlankRecipe", ItemStack.class, ItemStack.class));
        craftingHelpers = Optional.of(cls.newInstance());
    } catch (final Exception e) {
        e.printStackTrace();
        craftingHelpers = Optional.absent();
        addSawmillLogToPlankRecipe = Optional.absent();
    }
}

From source file:dagger.internal.codegen.writer.FieldWriter.java

FieldWriter(TypeName type, String name) {
    super(type, name);
    this.initializer = Optional.absent();
}

From source file:com.stepstone.sonar.plugin.coldfusion.cflint.xml.TagAttribute.java

protected Optional<String> getAttributeValue(String name, XMLStreamReader stream) {

    for (int i = 0; i < stream.getAttributeCount(); i++) {

        if (name.equalsIgnoreCase(stream.getAttributeLocalName(i))) {
            return Optional.of(StringUtils.trimToEmpty(stream.getAttributeValue(i)));
        }/*from w  w  w .ja  v a  2 s .  c  o m*/
    }

    return Optional.absent();
}

From source file:io.mesosphere.mesos.frameworks.cassandra.ZooKeeperSeedProviderConfig.java

private static Optional<Integer> optionalInteger(String key, Map<String, String> parameters) {
    Optional<String> stringOption = optionalString(key, parameters);

    if (stringOption.isPresent()) {

        try {/*from   www  .  j  a va 2s.c om*/

            return Optional.fromNullable(Integer.parseInt(stringOption.get()));

        } catch (NumberFormatException nfe) {

            LOGGER.error(String.format("failed to parse %s", key), nfe);

            return Optional.absent();
        }

    } else {
        return Optional.absent();
    }

}

From source file:com.facebook.buck.apple.simulator.AppleSimulatorProfileParsing.java

public static Optional<AppleSimulatorProfile> parseProfilePlistStream(InputStream inputStream)
        throws IOException {
    NSDictionary profile;/*from www.  ja  va2 s  .  co m*/
    try (BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream)) {
        try {
            profile = (NSDictionary) PropertyListParser.parse(bufferedInputStream);
        } catch (Exception e) {
            throw new IOException(e);
        }
    }

    NSObject supportedProductFamilyIDsObject = profile.objectForKey("supportedProductFamilyIDs");
    if (!(supportedProductFamilyIDsObject instanceof NSArray)) {
        LOG.warn("Invalid simulator profile.plist (supportedProductFamilyIDs missing or not an array)");
        return Optional.absent();
    }
    NSArray supportedProductFamilyIDs = (NSArray) supportedProductFamilyIDsObject;

    AppleSimulatorProfile.Builder profileBuilder = AppleSimulatorProfile.builder();
    for (NSObject supportedProductFamilyID : supportedProductFamilyIDs.getArray()) {
        if (supportedProductFamilyID instanceof NSNumber) {
            profileBuilder.addSupportedProductFamilyIDs(((NSNumber) supportedProductFamilyID).intValue());
        } else {
            LOG.warn("Invalid simulator profile.plist (supportedProductFamilyIDs contains non-number %s)",
                    supportedProductFamilyID);
            return Optional.absent();
        }
    }

    NSObject supportedArchsObject = profile.objectForKey("supportedArchs");
    if (!(supportedArchsObject instanceof NSArray)) {
        LOG.warn("Invalid simulator profile.plist (supportedArchs missing or not an array)");
        return Optional.absent();
    }
    NSArray supportedArchs = (NSArray) supportedArchsObject;
    for (NSObject supportedArch : supportedArchs.getArray()) {
        profileBuilder.addSupportedArchitectures(supportedArch.toString());
    }

    return Optional.of(profileBuilder.build());
}