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:im.dadoo.cas.server.dao.UserDao.java

public Optional<User> findById(int id) {
    Preconditions.checkArgument(id > 0, "id0");
    MapSqlParameterSource sps = new MapSqlParameterSource();
    sps.addValue("id", id);
    List<User> users = this.jdbcTemplate.query(FIND_BY_ID_SQL, sps, this.baseRowMapper);
    if (users != null && !users.isEmpty()) {
        return Optional.of(users.get(0));
    } else {// w  ww .  j a  va2s . c  o m
        return Optional.absent();
    }
}

From source file:se.sics.sweep.webservice.toolbox.Result.java

public static Result ok(Object value) {
    return new Result(Status.OK, Optional.absent(), Optional.fromNullable(value));
}

From source file:de.uniulm.omi.cloudiator.sword.drivers.openstack.strategy.CompositeFloatingIpPoolStrategy.java

@Override
public Optional<String> apply(String virtualMachine) {
    for (FloatingIpPoolStrategy strategy : strategies) {
        final Optional<String> optionalPool = strategy.apply(virtualMachine);
        if (optionalPool.isPresent()) {
            return optionalPool;
        }//from  w ww.j  ava2  s  .c o m
    }
    return Optional.absent();
}

From source file:org.locationtech.geogig.porcelain.RemoteResolve.java

/**
 * Executes the remote-add operation./*from w  ww  . j a v a  2 s  .com*/
 * 
 * @return the {@link Remote} that was added.
 */
@Override
protected Optional<Remote> _call() {
    if (name == null || name.isEmpty()) {
        throw new RemoteException(StatusCode.MISSING_NAME);
    }

    Optional<Remote> result = Optional.absent();

    ConfigDatabase config = configDatabase();
    List<String> allRemotes = config.getAllSubsections("remote");
    if (allRemotes.contains(name)) {

        String remoteSection = "remote." + name;
        Optional<String> remoteFetchURL = config.get(remoteSection + ".url");
        Optional<String> remoteFetch = config.get(remoteSection + ".fetch");
        Optional<String> remoteMapped = config.get(remoteSection + ".mapped");
        Optional<String> remoteMappedBranch = config.get(remoteSection + ".mappedBranch");
        Optional<String> remoteUserName = config.get(remoteSection + ".username");
        Optional<String> remotePassword = config.get(remoteSection + ".password");
        if (remoteFetchURL.isPresent() && remoteFetch.isPresent()) {
            Optional<String> remotePushURL = config.get(remoteSection + ".pushurl");

            Remote remote = new Remote(name, remoteFetchURL.get(), remotePushURL.or(remoteFetchURL.get()),
                    remoteFetch.get(), remoteMapped.or("false").equals("true"), remoteMappedBranch.orNull(),
                    remoteUserName.orNull(), remotePassword.orNull());
            result = Optional.of(remote);
        }
    }
    return result;
}

From source file:org.eclipse.mylyn.internal.wikitext.commonmark.inlines.PotentialEmphasisDelimiter.java

@Override
Optional<InlinesSubstitution> secondPass(List<Inline> inlines) {
    if (!canClose) {
        return Optional.absent();
    }/*from w  ww.j  a va2s.c  o m*/
    int indexOfThis = inlines.indexOf(this);
    Optional<PotentialEmphasisDelimiter> opener = previousOpener(inlines, indexOfThis);
    if (opener.isPresent()) {
        PotentialEmphasisDelimiter openingDelimiter = opener.get();
        int delimiterSize = delimiterSize(openingDelimiter);
        int indexOfOpeningDelimiter = inlines.indexOf(openingDelimiter);

        List<Inline> contents = InlineParser
                .secondPass(inlines.subList(indexOfOpeningDelimiter + 1, indexOfThis));

        int spanOffset = openingDelimiter.getOffset();
        int spanLength = getOffset() + getLength() - openingDelimiter.getOffset();
        Inline emphasis = createEmphasis(openingDelimiter.getLine(), spanOffset, spanLength, delimiterSize,
                contents);

        ImmutableList.Builder<Inline> substitutionInlines = ImmutableList.builder();
        if (delimiterSize < openingDelimiter.getLength()) {
            substitutionInlines.add(createPotentialOpeningDelimiter(openingDelimiter, delimiterSize));
        }
        substitutionInlines.add(emphasis);
        if (delimiterSize < getLength()) {
            substitutionInlines.add(createPotentialClosingDelimiter(delimiterSize));
        }

        return Optional.of(new InlinesSubstitution(openingDelimiter, this, substitutionInlines.build()));
    }
    return Optional.absent();
}

From source file:org.opendaylight.controller.netconf.confignetconfconnector.mapping.attributes.resolving.ObjectNameAttributeResolvingStrategy.java

@Override
public Optional<ObjectName> parseAttribute(String attrName, Object value) {
    if (value == null) {
        return Optional.absent();
    }/*from ww w .  jav  a2 s .  c  o  m*/

    Util.checkType(value, ObjectNameAttributeMappingStrategy.MappedDependency.class);

    ObjectNameAttributeMappingStrategy.MappedDependency mappedDep = (ObjectNameAttributeMappingStrategy.MappedDependency) value;
    String serviceName = mappedDep.getServiceName();
    String refName = mappedDep.getRefName();
    String namespace = mappedDep.getNamespace();
    LOG.trace("Getting service instance by service name {} : {} and ref name {}", namespace, serviceName,
            refName);

    ObjectName on = serviceTracker.getByServiceAndRefName(namespace, serviceName, refName);

    LOG.debug("Attribute {} : {} parsed to type {}", attrName, value, getOpenType());
    return Optional.of(on);
}

From source file:org.jclouds.cloudsigma2.domain.PaginatedCollection.java

@Override
public Optional<Object> nextMarker() {
    if (paginationOptions.getLimit() == 0) {
        return Optional.absent();
    }/* ww w  .  j ava 2  s  .  c  o m*/

    if (paginationOptions.getTotalCount() - paginationOptions.getOffset() > paginationOptions.getLimit()) {
        return Optional.of((Object) new PaginationOptions.Builder().limit(paginationOptions.getLimit())
                .offset(paginationOptions.getOffset() + paginationOptions.getLimit()).build());
    }

    return Optional.absent();
}

From source file:com.treasuredata.client.TDClientHttpException.java

public Optional<Date> getRetryAfter() {
    if (retryAfter == -1) {
        return Optional.absent();
    } else {/*from  w  ww  .  java2  s.  c  o m*/
        return Optional.of(new Date(retryAfter));
    }
}

From source file:org.eclipse.buildship.core.util.file.FileUtils.java

/**
 * Derives the absolute path from the specified {@code File} instance.
 *
 * @param file the file from which to get the absolute path
 * @return the absolute path if the file is not {@code null}, otherwise
 * {@link Optional#absent()}//w  ww  .  j  ava  2 s  .co m
 */
public static Optional<String> getAbsolutePath(File file) {
    if (file == null) {
        return Optional.absent();
    } else {
        return Optional.of(file.getAbsolutePath());
    }
}

From source file:nih.quack.jythonpygments.Lexers.java

/**
 * Lookup a Pygments lexer by an alias.//  ww  w  .j  a v  a2s. c  o m
 *
 * @param gateway
 * @param alias   language alias for which a lexer is queried
 */
public Optional<Object> lookupLexer(PyGateway gateway, String alias) {
    Object result = lexerCache.get(alias);

    if (result == null) {
        result = evalLookupLexer(gateway, alias, NULL);
        lexerCache.put(alias, result);
    }

    if (result == NULL) {
        return Optional.absent();
    } else {
        return Optional.of(result);
    }
}