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.dangdang.ddframe.rdb.sharding.parser.visitor.basic.mysql.MySQLInsertVisitor.java

@Override
public boolean visit(final MySqlInsertStatement x) {
    final String tableName = SQLUtil.getExactlyValue(x.getTableName().toString());
    getParseContext().setCurrentTable(tableName, Optional.fromNullable(x.getAlias()));
    if (null == x.getValues()) {
        return super.visit(x);
    }/*from   w ww  .  j a  v  a  2  s.co m*/
    Collection<String> autoIncrementColumns = getParseContext().getShardingRule()
            .getAutoIncrementColumns(tableName);
    List<SQLExpr> columns = x.getColumns();
    List<SQLExpr> values = x.getValues().getValues();
    for (int i = 0; i < x.getColumns().size(); i++) {
        String columnName = SQLUtil.getExactlyValue(columns.get(i).toString());
        getParseContext().addCondition(columnName, tableName, BinaryOperator.EQUAL, values.get(i),
                getDatabaseType(), getParameters());
        if (autoIncrementColumns.contains(columnName)) {
            autoIncrementColumns.remove(columnName);
        }
    }
    if (autoIncrementColumns.isEmpty()) {
        return super.visit(x);
    }
    supplyAutoIncrementColumn(autoIncrementColumns, tableName, columns, values);
    return super.visit(x);
}

From source file:net.oneandone.troilus.Optionals.java

/**
 * @param obj  the object (could also be an optional)
 * @return the object wrapped by guava optional
 *//*w ww. ja  va2  s.c  om*/
@SuppressWarnings("unchecked")
public static <T> Optional<T> toGuavaOptional(T obj) {
    if (obj == null) {
        return Optional.<T>absent();
    }

    if (isGuavaOptional(obj)) {
        return (Optional<T>) obj;

    } else if (isJavaOptional(obj)) {
        return Optional.fromNullable((T) fromJavaOptional(obj));

    } else {
        return Optional.of(obj);
    }
}

From source file:com.haulmont.cuba.desktop.settings.DesktopSettingsClient.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();
    }//from   w ww. j  a v a2  s  .  com

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

    return setting;
}

From source file:org.geogig.osm.internal.history.Changeset.java

public Optional<String> getComment() {
    return Optional.fromNullable(comment);
}

From source file:org.jclouds.ultradns.ws.binders.ZoneAndResourceRecordToXML.java

@SuppressWarnings("unchecked")
@Override//from w w w .j  a v a 2s .  c om
public <R extends HttpRequest> R bindToRequest(R request, Map<String, Object> postParams) {
    String zoneName = postParams.get("zoneName").toString();
    ResourceRecord record = ResourceRecord.class.cast(postParams.get("resourceRecord"));
    String xml = toXML(zoneName, record);
    Optional<?> guid = Optional.fromNullable(postParams.get("guid"));
    if (guid.isPresent()) {
        xml = update(guid.get(), xml);
    }
    return (R) request.toBuilder().payload(xml).build();
}

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

public static Result internalError(String reason) {
    return new Result(Status.INTERNAL_ERROR, Optional.fromNullable(reason));
}

From source file:org.opendaylight.mdsal.dom.spi.SimpleDOMMountPoint.java

@Override
public <T extends DOMService> Optional<T> getService(final Class<T> cls) {
    return Optional.fromNullable(services.getInstance(cls));
}

From source file:org.apache.aurora.scheduler.http.api.security.IniShiroRealmModule.java

public IniShiroRealmModule() {
    this(Optional.fromNullable(SHIRO_INI_PATH.get()));
}

From source file:org.eclipse.epp.internal.logging.aeri.ui.v2.ServerResponse05.java

public Optional<String> getBugId() {
    return Optional.fromNullable(bugId);
}