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:info.archinnov.achilles.type.Options.java

public Optional<Long> getTimestamp() {
    return Optional.fromNullable(timestamp);
}

From source file:org.opendaylight.yangtools.yang.data.operations.DataOperations.java

public static Optional<MapNode> modify(ListSchemaNode schema, MapNode stored, MapNode modified,
        ModifyAction defaultOperation) throws DataModificationException {

    OperationStack operations = new OperationStack(defaultOperation);

    return new MapNodeModification().modify(schema, Optional.fromNullable(stored),
            Optional.fromNullable(modified), operations);
}

From source file:retrofit.converter.guava.OptionalConverter.java

@Override
public Optional<T> convert(ResponseBody value) throws IOException {
    return Optional.fromNullable(delegate.convert(value));
}

From source file:org.eclipse.recommenders.utils.rcp.RCPUtils.java

public static <T> Optional<T> first(final ISelection s) {
    final T element = unsafeFirstElement(s);
    return Optional.fromNullable(element);
}

From source file:com.dangdang.ddframe.rdb.sharding.parser.visitor.basic.mysql.MySQLDeleteVisitor.java

@Override
public boolean visit(final MySqlDeleteStatement x) {
    getParseContext().setCurrentTable(x.getTableName().toString(), Optional.fromNullable(x.getAlias()));
    return super.visit(x);
}

From source file:org.opendaylight.yangtools.yang.data.api.schema.tree.spi.MaterializedContainerNode.java

@Override
public Optional<TreeNode> getChild(final PathArgument childId) {
    return Optional.fromNullable(getModifiedChild(childId));
}

From source file:controllers.HelloAnnotatedController.java

@Timed("hello.annotated")
@GET("/")/*from   w  w w  . j av  a 2 s .c om*/
@Consumes({ Consumes.HTML })
public void hello(String name) {
    getResponse().bind("greeting", "Hello " + Optional.fromNullable(name).or("World")).render("hello");
}

From source file:org.apache.rya.indexing.pcj.fluo.app.export.ParametersBase.java

protected static boolean getBoolean(final Map<String, String> params, final String paramName,
        final boolean defaultValue) {
    checkNotNull(params);//from   w ww  .j a  v a2s . c om
    checkNotNull(paramName);

    final Optional<String> paramValue = Optional.fromNullable(params.get(paramName));
    return paramValue.isPresent() ? Boolean.parseBoolean(paramValue.get()) : defaultValue;
}

From source file:org.jclouds.aws.filters.FormSignerUtils.java

private static Optional<String> getAnnotatedApiVersion(Invocation invocation) {
    final Invokable<?, ?> invokable = invocation.getInvokable();
    if (invokable.isAnnotationPresent(ApiVersionOverride.class)) {
        return Optional.fromNullable(invokable.getAnnotation(ApiVersionOverride.class).value());
    } else {//  w  w  w . j a v  a 2s  .  com
        final Class<?> owner = invokable.getOwnerType().getRawType();
        if (owner.isAnnotationPresent(ApiVersionOverride.class)) {
            return Optional.fromNullable(owner.getAnnotation(ApiVersionOverride.class).value());
        }
    }
    return Optional.absent();
}

From source file:com.github.kevints.mesos.scheduler.server.LibprocessServletUtils.java

static Optional<PID> getSenderPid(HttpServletRequest req) {
    Optional<String> libprocessFrom = Optional.fromNullable(req.getHeader("X-Libprocess-From"));
    if (libprocessFrom.isPresent()) {
        try {//ww w .j a  va  2  s  . co  m
            return Optional.of(PID.fromString(libprocessFrom.get()));
        } catch (IllegalArgumentException e) {
            return Optional.absent();
        }
    }

    Optional<String> userAgent = Optional.fromNullable(req.getHeader("User-Agent"));
    if (userAgent.isPresent()) {
        List<String> pid = Splitter.on("libprocess/").omitEmptyStrings().splitToList(userAgent.get());
        if (pid.size() != 1) {
            return Optional.absent();
        } else {
            try {
                return Optional.of(PID.fromString(pid.get(0)));
            } catch (IllegalArgumentException e) {
                return Optional.absent();
            }
        }
    }

    return Optional.absent();
}