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:org.apache.mailet.base.MailetPipelineLogging.java

private static Optional<Logger> getLogger(Mailet mailet) {
    MailetConfig mailetConfig = mailet.getMailetConfig();
    if (mailetConfig == null) {
        return Optional.absent();
    }//from   ww w.  jav  a2 s .co m
    MailetContext mailetContext = mailetConfig.getMailetContext();
    if (mailetContext == null) {
        return Optional.absent();
    }
    return Optional.fromNullable(mailetContext.getLogger());
}

From source file:com.haulmont.cuba.web.settings.WebSettingsClient.java

@Override
public String getSetting(String name) {
    Map<String, Optional<String>> settings = getCache();
    Optional<String> cached = settings.get(name);
    if (cached != null) {
        return cached.orNull();
    }/* w w w . j  a  v a2 s  .  c om*/

    String setting = userSettingService.loadSetting(ClientType.WEB, name);
    settings.put(name, Optional.fromNullable(setting));

    return setting;
}

From source file:org.apache.cassandra.cql.hooks.ExecutionContext.java

public ExecutionContext(ThriftClientState clientState, String queryString, List<ByteBuffer> variables) {
    this.clientState = clientState;
    this.queryString = Optional.fromNullable(queryString);
    this.variables = variables;
}

From source file:org.mayocat.shop.cart.CartBuilder.java

public CartBuilder setShipping(PriceWithTaxes shipping) {
    this.shipping = Optional.fromNullable(shipping);
    return this;
}

From source file:com.spotify.heroic.aggregation.simple.Quantile.java

@JsonCreator
public Quantile(@JsonProperty("sampling") SamplingQuery sampling, @JsonProperty("q") Double q,
        @JsonProperty("error") Double error) {
    super(Optional.fromNullable(sampling).or(SamplingQuery::empty));
    this.q = Optional.fromNullable(q).or(DEFAULT_QUANTILE);
    this.error = Optional.fromNullable(error).or(DEFAULT_ERROR);
}

From source file:com.blackberry.bdp.kontroller.resources.AuthenticationStatusResource.java

@GET
@Timed/*w  w  w  . j a  v  a2s .c o m*/
@Produces(value = MediaType.APPLICATION_JSON)
public AuthenticationStatus get(@Auth(required = false) User user) throws Exception {
    AuthenticationStatus status = new AuthenticationStatus();
    if (Optional.fromNullable(user).isPresent()) {
        status.setAuthenticated(true);
        status.setUser(user);
    }
    return status;
}

From source file:com.datastax.driver.core.schemabuilder.Drop.java

Drop(String keyspaceName, String itemName, DroppedItem itemType) {
    this.itemType = itemType.name();
    validateNotEmpty(keyspaceName, "Keyspace name");
    validateNotEmpty(itemName, this.itemType.toLowerCase() + " name");
    validateNotKeyWord(keyspaceName, String
            .format("The keyspace name '%s' is not allowed because it is a reserved keyword", keyspaceName));
    validateNotKeyWord(itemName, String.format(
            "The " + this.itemType.toLowerCase() + " name '%s' is not allowed because it is a reserved keyword",
            itemName));//w w w .  ja v a2s. c  o  m
    this.itemName = itemName;
    this.keyspaceName = Optional.fromNullable(keyspaceName);
}

From source file:io.crate.sql.tree.Window.java

public Window(List<Expression> partitionBy, List<SortItem> orderBy, WindowFrame frame) {
    this.partitionBy = checkNotNull(partitionBy, "partitionBy is null");
    this.orderBy = checkNotNull(orderBy, "orderBy is null");
    this.frame = Optional.fromNullable(frame);
}

From source file:io.crate.sql.tree.IfExpression.java

public IfExpression(Expression condition, Expression trueValue, Expression falseValue) {
    this.condition = checkNotNull(condition, "condition is null");
    this.trueValue = checkNotNull(trueValue, "trueValue is null");
    this.falseValue = Optional.fromNullable(falseValue);
}

From source file:org.whispersystems.textsecuregcm.storage.PendingDevicesManager.java

public Optional<String> getCodeForNumber(String number) {
    Optional<String> code = memcacheGet(number);

    if (!code.isPresent()) {
        code = Optional.fromNullable(pendingDevices.getCodeForNumber(number));

        if (code.isPresent()) {
            memcacheSet(number, code.get());
        }//w w w.j  a v  a2s .com
    }

    return code;
}