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:com.dangdang.ddframe.rdb.sharding.parsing.parser.dialect.sqlserver.SQLServerParser.java

@Override
protected boolean isRowNumberCondition(final SelectStatement selectStatement, final String columnLabel) {
    Optional<String> rowNumberAlias = Optional.absent();
    for (SelectItem each : selectStatement.getItems()) {
        if (each.getAlias().isPresent() && "ROW_NUMBER".equalsIgnoreCase(each.getExpression())) {
            rowNumberAlias = each.getAlias();
        }//w  ww  .  j  av  a2 s .co m
    }
    return columnLabel.equalsIgnoreCase(rowNumberAlias.orNull());
}

From source file:org.opendaylight.netconf.test.tool.FakeCapability.java

/**
 l*/*  w ww  .ja  v a 2 s .c  o m*/
 * @return empty schema source to trigger schema resolution exception.
 */
@Override
public Optional<String> getCapabilitySchema() {
    return Optional.absent();
}

From source file:com.atlassian.jira.rest.client.api.domain.OperationGroup.java

static <T> Optional<T> accept(final Iterable<? extends Operation> operations,
        final OperationVisitor<T> visitor) {
    for (Operation operation : operations) {
        Optional<T> result = operation.accept(visitor);
        if (result.isPresent()) {
            return result;
        }//from   w  ww.  j a  v a 2 s.  c om
    }
    return Optional.absent();
}

From source file:com.apothesource.pillfill.service.cache.impl.DefaultNoOpCacheServiceImpl.java

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

From source file:org.opendaylight.yangtools.yang.model.util.PatternConstraintImpl.java

PatternConstraintImpl(final String regex, final Optional<String> description,
        final Optional<String> reference) {
    this(regex, description, reference, null, null, Optional.absent());
}

From source file:qa.qcri.nadeef.core.datamodel.Violation.java

/**
 * Constructor.// ww  w .j  a va2s.  co m
 * @param ruleId rule id.
 */
public Violation(String ruleId) {
    Preconditions.checkArgument(!Strings.isNullOrEmpty(ruleId));
    this.ruleId = ruleId;
    this.cells = Sets.newHashSet();
    this.vid = Optional.absent();
}

From source file:org.opendaylight.controller.netconf.util.messages.NetconfMessageFactory.java

public NetconfMessageFactory() {
    clientId = Optional.absent();
}

From source file:org.apache.jclouds.oneandone.rest.handlers.OneAndOneRateLimitRetryHandler.java

@Override
protected Optional<Long> millisToNextAvailableRequest(HttpCommand command, HttpResponse response) {

    String secondsToNextAvailableRequest = response.getFirstHeaderOrNull(RETRY_AFTER_CUSTOM);
    if (secondsToNextAvailableRequest == null) {
        return Optional.absent();
    }/*from www  . j a  va 2s.  co m*/
    return Optional.of(millisUntilNextAvailableRequest(Long.parseLong(secondsToNextAvailableRequest)));

}

From source file:org.opendaylight.controller.config.facade.xml.mapping.attributes.resolving.EnumAttributeResolvingStrategy.java

@Override
public Optional<Object> parseAttribute(String attrName, Object value) throws DocumentedException {
    if (value == null) {
        return Optional.absent();
    }// w  w  w  . ja va  2 s . c o m

    Util.checkType(value, Map.class);
    Map<?, ?> valueMap = (Map<?, ?>) value;
    Preconditions.checkArgument(valueMap.size() == 1,
            "Unexpected value size " + value + " should be just 1 foe enum");
    final Object innerValue = valueMap.values().iterator().next();
    Util.checkType(innerValue, String.class);

    final String className = getOpenType().getTypeName();
    final Object parsedValue = enumResolver.fromYang(className, ((String) innerValue));

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

From source file:org.cebolla.repositories.AbstractFakeRepositoryWithSimpleLookup.java

/**
 * Find an entity with the given key in the repository
 * //from   ww  w .  j  a va2  s  .  c om
 * @return an @see com.google.common.base.Optional of the entity, if found. Otherwise Optional.absent()
 */
public Optional<EntityType> lookup(Key key) {
    keysLookedUp.add(key);

    for (EntityType entity : filter(new KeyMatchPredicate(key))) {
        return Optional.of(entity);
    }

    return Optional.absent();
}