Example usage for java.util Optional map

Introduction

In this page you can find the example usage for java.util Optional map.

Prototype

public <U> Optional<U> map(Function<? super T, ? extends U> mapper)

Source Link

Document

If a value is present, returns an Optional describing (as if by #ofNullable ) the result of applying the given mapping function to the value, otherwise returns an empty Optional .

Usage

From source file:org.trustedanalytics.cloud.cc.api.CcServiceInstance.java

@JsonIgnore
public String getServicePlanName() {
    Optional<CcServiceInstance> serviceInstance = Optional.of(this);
    return serviceInstance.map(CcServiceInstance::getServicePlan).map(CcServicePlan::getName).orElse(null);
}

From source file:se.omegapoint.facepalm.client.adapters.PolicyAdapter.java

public Policy retrievePolicy(final String filename) {
    final Optional<se.omegapoint.facepalm.domain.Policy> policy = policyService.retrievePolicy(filename);
    return policy.map(p -> new Policy(p.text)).orElseGet(() -> new Policy("Could not load policy"));
}

From source file:org.trustedanalytics.cloud.cc.api.CcServiceInstance.java

@JsonIgnore
public UUID getServiceGuid() {
    Optional<CcServiceInstance> serviceInstance = Optional.of(this);
    return serviceInstance.map(CcServiceInstance::getServicePlan).map(CcServicePlan::getService)
            .map(CcService::getGuid).orElse(null);
}

From source file:io.pravega.controller.store.stream.tables.TableHelper.java

/**
 * Get active segments at given timestamp.
 * Perform binary search on index table to find the record corresponding to timestamp.
 * Note: index table may be stale or not reflect lastest state of history table.
 * So we may need to fall through in the history table from the record being pointed to by index
 * until we find the correct record./*from w w w.  ja v a2 s  .  c  o  m*/
 *
 * @param timestamp    timestamp
 * @param indexTable   indextable
 * @param historyTable history table
 * @return
 */
public static List<Integer> getActiveSegments(final long timestamp, final byte[] indexTable,
        final byte[] historyTable) {
    Optional<HistoryRecord> record = HistoryRecord.readRecord(historyTable, 0, true);
    if (record.isPresent() && timestamp > record.get().getScaleTime()) {
        final Optional<IndexRecord> recordOpt = IndexRecord.search(timestamp, indexTable).getValue();
        final int startingOffset = recordOpt.isPresent() ? recordOpt.get().getHistoryOffset() : 0;

        record = findRecordInHistoryTable(startingOffset, timestamp, historyTable, true);
    }
    return record.map(HistoryRecord::getSegments).orElse(new ArrayList<>());
}

From source file:fi.helsinki.opintoni.cache.SpringFeedFetcherCache.java

private SyndFeedInfo get(URL feedUrl) {
    Optional<ValueWrapper> valueWrapper = Optional.ofNullable(cache.get(feedUrl));

    return valueWrapper.map(w -> (SyndFeedInfo) w.get()).orElse(null);
}

From source file:se.omegapoint.facepalm.client.security.DbAuthenticationProvider.java

@Override
public Authentication authenticate(final Authentication authentication) throws AuthenticationException {
    final UsernamePasswordAuthenticationToken token = (UsernamePasswordAuthenticationToken) authentication;
    final String username = (String) token.getPrincipal();
    final String password = (String) token.getCredentials();

    final Optional<User> user = userRepository.findByNameAndPassword(username, password);

    return user.map(
            u -> new UsernamePasswordAuthenticationToken(new AuthenticatedUser(u.username), null, emptyList()))
            .orElse(null);//from w ww  .  j  av a 2 s  . c  o m
}

From source file:io.github.cdelmas.spike.springboot.car.CarsController.java

@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public ResponseEntity<CarRepresentation> byId(@PathVariable("id") String carId) {
    Optional<Car> car = carRepository.byId(Integer.parseInt(carId));
    return car.map(c -> {
        CarRepresentation rep = toCarRepresentation(c);
        return new ResponseEntity<>(rep, HttpStatus.OK);
    }).orElse(new ResponseEntity<>(HttpStatus.NOT_FOUND));
}

From source file:com.example.TokenServices.java

@Override
public OAuth2AccessToken readAccessToken(final String accessToken) {
    final Optional<AccessTokenEntity> token = accessTokenRepository.findByAccessToken(accessToken);
    return token.map(AccessToken::new).orElseThrow(invalidAccessToken(accessToken));
}

From source file:com.example.TokenServices.java

@Override
public OAuth2Authentication loadAuthentication(final String accessToken)
        throws AuthenticationException, InvalidTokenException {
    final Optional<AccessTokenEntity> token = accessTokenRepository.findByAccessToken(accessToken);
    return token.map(Authentication::new).map(Optional::of).orElseThrow(invalidAccessToken(accessToken))
            .filter(Authentication::isNotExpired).map(Authentication::oauth2)
            .orElseThrow(tokenIsExpired(accessToken));
}

From source file:com.blackducksoftware.integration.hub.detect.detector.bitbake.GraphParserTransformer.java

private Optional<String> getVersionFromNode(final GraphNode graphNode) {
    final Optional<String> attribute = getLabelAttribute(graphNode);

    return attribute.map(this::getVersionFromLabel);
}