Example usage for java.util SortedSet isEmpty

Introduction

In this page you can find the example usage for java.util SortedSet isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this set contains no elements.

Usage

From source file:org.apache.hadoop.hbase.regionserver.SegmentScanner.java

/**
 * Seek the scanner at the first Cell of the row which is the previous row
 * of specified key//from  w  w  w  .  j  ava2  s  . co m
 *
 * @param cell seek value
 * @return true if the scanner at the first valid Cell of previous row,
 *     false if not existing such Cell
 */
@Override
public boolean seekToPreviousRow(Cell cell) throws IOException {
    if (closed) {
        return false;
    }
    boolean keepSeeking;
    Cell key = cell;
    do {
        Cell firstKeyOnRow = PrivateCellUtil.createFirstOnRow(key);
        SortedSet<Cell> cellHead = segment.headSet(firstKeyOnRow);
        Cell lastCellBeforeRow = cellHead.isEmpty() ? null : cellHead.last();
        if (lastCellBeforeRow == null) {
            current = null;
            return false;
        }
        Cell firstKeyOnPreviousRow = PrivateCellUtil.createFirstOnRow(lastCellBeforeRow);
        this.stopSkippingKVsIfNextRow = true;
        this.stopSkippingKVsRow = firstKeyOnPreviousRow;
        seek(firstKeyOnPreviousRow);
        this.stopSkippingKVsIfNextRow = false;
        if (peek() == null || segment.getComparator().compareRows(peek(), firstKeyOnPreviousRow) > 0) {
            keepSeeking = true;
            key = firstKeyOnPreviousRow;
            continue;
        } else {
            keepSeeking = false;
        }
    } while (keepSeeking);
    return true;
}

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From source file:com.alibaba.otter.shared.arbitrate.impl.zookeeper.lock.DistributedLock.java

/**
 * lock??watch????lock?//from   ww  w . j  a  va  2  s .c om
 */
private Boolean acquireLock(final BooleanMutex mutex) {
    try {
        do {
            if (id == null) {// ?lock
                long sessionId = getSessionId();
                String prefix = "x-" + sessionId + "-";
                // 
                String path = zookeeper.create(root + "/" + prefix, data, CreateMode.EPHEMERAL_SEQUENTIAL);
                int index = path.lastIndexOf("/");
                id = StringUtils.substring(path, index + 1);
                idName = new LockNode(id);
            }

            if (id != null) {
                List<String> names = zookeeper.getChildren(root);
                if (names.isEmpty()) {
                    logger.warn("lock lost with scene:empty list, id[] and node[]", id, idName);
                    unlock();// ??
                } else {
                    // ?
                    SortedSet<LockNode> sortedNames = new TreeSet<LockNode>();
                    for (String name : names) {
                        sortedNames.add(new LockNode(name));
                    }

                    if (sortedNames.contains(idName) == false) {
                        logger.warn("lock lost with scene:not contains ,id[] and node[]", id, idName);
                        unlock();// ??
                        continue;
                    }

                    // ?ownerId
                    ownerId = sortedNames.first().getName();
                    if (mutex != null && isOwner()) {
                        mutex.set(true);// ?
                        return true;
                    } else if (mutex == null) {
                        return isOwner();
                    }

                    SortedSet<LockNode> lessThanMe = sortedNames.headSet(idName);
                    if (!lessThanMe.isEmpty()) {
                        // ?
                        LockNode lastChildName = lessThanMe.last();
                        lastChildId = lastChildName.getName();
                        // watcher?
                        IZkConnection connection = zookeeper.getConnection();
                        // zkclient?zk?lock??watcher?zk?
                        ZooKeeper orginZk = ((ZooKeeperx) connection).getZookeeper();
                        Stat stat = orginZk.exists(root + "/" + lastChildId, new AsyncWatcher() {

                            public void asyncProcess(WatchedEvent event) {
                                if (!mutex.state()) { // ?????lock
                                    acquireLock(mutex);
                                } else {
                                    logger.warn("locked successful.");
                                }
                            }

                        });

                        if (stat == null) {
                            acquireLock(mutex);// ????watcher?
                        }
                    } else {
                        if (isOwner()) {
                            mutex.set(true);
                        } else {
                            logger.warn("lock lost with scene:no less ,id[] and node[]", id, idName);
                            unlock();// ?idownerId??
                        }
                    }
                }
            }
        } while (id == null);
    } catch (KeeperException e) {
        exception = e;
        if (mutex != null) {
            mutex.set(true);
        }
    } catch (InterruptedException e) {
        interrupt = e;
        if (mutex != null) {
            mutex.set(true);
        }
    } catch (Throwable e) {
        other = e;
        if (mutex != null) {
            mutex.set(true);
        }
    }

    if (isOwner() && mutex != null) {
        mutex.set(true);
    }
    return Boolean.FALSE;
}

---

From source file:com.sap.research.connectivity.gw.GwOperationsImpl.java

public boolean isCommandGWEntityAvailable() {
    SortedSet<FileDetails> files = fileManager
            .findMatchingAntPath(getSubPackagePath(oDataFolder) + SEPARATOR + "*_metadata.xml");
    return !files.isEmpty();
}

---

From source file:co.rsk.peg.BridgeStorageProviderTest.java

@Test
public void createSaveAndRecreateInstance() throws IOException {
    Repository repository = new RepositoryImpl();
    Repository track = repository.startTracking();

    BridgeStorageProvider provider0 = new BridgeStorageProvider(track, PrecompiledContracts.BRIDGE_ADDR);
    provider0.getBtcTxHashesAlreadyProcessed();
    provider0.getRskTxsWaitingForBroadcasting();
    provider0.getRskTxsWaitingForConfirmations();
    provider0.getRskTxsWaitingForSignatures();
    provider0.getBtcUTXOs();//from   w  w  w.j a v a  2 s  . c o m
    provider0.save();
    track.commit();

    track = repository.startTracking();

    byte[] contractAddress = Hex.decode(PrecompiledContracts.BRIDGE_ADDR);

    Assert.assertNotNull(repository.getContractDetails(contractAddress));
    Assert.assertNotNull(repository.getStorageBytes(contractAddress, new DataWord("btcTxHashesAP".getBytes())));
    Assert.assertNotNull(
            repository.getStorageBytes(contractAddress, new DataWord("rskTxsWaitingFC".getBytes())));
    Assert.assertNotNull(
            repository.getStorageBytes(contractAddress, new DataWord("rskTxsWaitingFS".getBytes())));
    Assert.assertNotNull(
            repository.getStorageBytes(contractAddress, new DataWord("rskTxsWaitingFB".getBytes())));
    Assert.assertNotNull(repository.getStorageBytes(contractAddress, new DataWord("btcUTXOs".getBytes())));

    BridgeStorageProvider provider = new BridgeStorageProvider(track, PrecompiledContracts.BRIDGE_ADDR);

    SortedSet<Sha256Hash> processed = provider.getBtcTxHashesAlreadyProcessed();

    Assert.assertNotNull(processed);
    Assert.assertTrue(processed.isEmpty());

    SortedMap<Sha3Hash, Pair<BtcTransaction, Long>> broadcasting = provider.getRskTxsWaitingForBroadcasting();

    Assert.assertNotNull(broadcasting);
    Assert.assertTrue(broadcasting.isEmpty());

    SortedMap<Sha3Hash, BtcTransaction> confirmations = provider.getRskTxsWaitingForConfirmations();

    Assert.assertNotNull(confirmations);
    Assert.assertTrue(confirmations.isEmpty());

    SortedMap<Sha3Hash, BtcTransaction> signatures = provider.getRskTxsWaitingForSignatures();

    Assert.assertNotNull(signatures);
    Assert.assertTrue(signatures.isEmpty());

    List<UTXO> utxos = provider.getBtcUTXOs();

    Assert.assertNotNull(utxos);
    Assert.assertTrue(utxos.isEmpty());

    Wallet wallet = provider.getWallet();

    Assert.assertNotNull(wallet);
    Assert.assertNotNull(wallet.getCoinSelector());
}

---

From source file:org.isatools.tablib.export.graph2tab.LayersBuilder.java

/**
 * Set the layer for a node, which means all the two internal structures used for that are updated.
 * //from  www  . j a v  a 2  s  .co m
 */
private void setLayer(Node node, int layer) {
    // Remove from the old layer
    Integer oldLayer = node2Layer.get(node);
    if (oldLayer != null) {
        SortedSet<Node> oldLayerNodes = layer2Nodes.get(oldLayer);
        if (oldLayerNodes.remove(node) && oldLayerNodes.isEmpty() && oldLayer == maxLayer)
            maxLayer--;
    }

    // Add to the new layer
    SortedSet<Node> lnodes = layer2Nodes.get(layer);
    if (lnodes == null) {
        lnodes = new TreeSet<Node>();
        layer2Nodes.put(layer, lnodes);
    }
    lnodes.add(node);
    node2Layer.put(node, layer);
    if (layer > maxLayer)
        maxLayer = layer;
}

---

From source file:com.sap.research.connectivity.gw.GwOperationsImpl.java

public boolean isCommandGWMVCAdaptCommandAvailable() throws IOException {
    /*//from   ww w . j  a  v a  2  s  . com
     * We check first to see if there is a gateway entity available. If so, we check if there are any generated controllers.
     */
    boolean returnResults = false;
    if (isCommandGWFieldAvailable() == true) {
        SortedSet<FileDetails> files = fileManager
                .findMatchingAntPath(getSubPackagePath(web) + SEPARATOR + "*Controller.java");
        if (!files.isEmpty())
            returnResults = true;
    }

    return returnResults;
}

---

From source file:org.kalypso.model.wspm.ui.profil.wizard.createDivider.CreateDividerOperation.java

private Integer[] mixExistingWithIntersectionPoint(final IProfile profil, final Integer intersectionIndex) {
    final Integer[] markerPoints = existingMarkersAsIndices(profil);
    final SortedSet<Integer> markerIndices = new TreeSet<>(Arrays.asList(markerPoints));

    // depends on the side of the profile!
    final IProfileRecord lowestPoint = ProfileVisitors.findLowestPoint(profil);
    if (Objects.isNull(lowestPoint))
        return new Integer[] { intersectionIndex };

    final Collection<Integer> result = new ArrayList<>(2);
    result.add(intersectionIndex);// w  w w  .ja  v  a2 s .  co  m

    if (intersectionIndex > lowestPoint.getIndex()) {
        // use leftmost of all left markers
        final SortedSet<Integer> leftSet = markerIndices.headSet(lowestPoint.getIndex());
        if (!leftSet.isEmpty()) {
            result.add(leftSet.first());
        }
    } else {
        // use leftmost of all left markers
        final SortedSet<Integer> rightSet = markerIndices.tailSet(lowestPoint.getIndex());
        if (!rightSet.isEmpty()) {
            result.add(rightSet.last());
        }
    }

    return result.toArray(new Integer[result.size()]);
}

---

From source file:org.apache.nifi.registry.web.api.ExtensionRepositoryResource.java

@GET
@Path("{groupId}/{artifactId}/{version}/sha256")
@Consumes(MediaType.WILDCARD)//from   w  w  w  .j av a  2  s . c o m
@Produces(MediaType.TEXT_PLAIN)
@ApiOperation(value = "Gets the hex representation of the SHA-256 digest for the binary content of the version of the extension bundle. Since the "
        + "same group-artifact-version can exist in multiple buckets, this will return the checksum of the first one returned. This will be "
        + "consistent since the checksum must be the same when existing in multiple buckets.", response = String.class)
@ApiResponses({ @ApiResponse(code = 400, message = HttpStatusMessages.MESSAGE_400),
        @ApiResponse(code = 401, message = HttpStatusMessages.MESSAGE_401),
        @ApiResponse(code = 403, message = HttpStatusMessages.MESSAGE_403),
        @ApiResponse(code = 404, message = HttpStatusMessages.MESSAGE_404),
        @ApiResponse(code = 409, message = HttpStatusMessages.MESSAGE_409) })
public Response getExtensionBundleVersionSha256(
        @PathParam("groupId") @ApiParam("The group identifier") final String groupId,
        @PathParam("artifactId") @ApiParam("The artifact identifier") final String artifactId,
        @PathParam("version") @ApiParam("The version") final String version) {
    final Set<String> authorizedBucketIds = getAuthorizedBucketIds(RequestAction.READ);
    if (authorizedBucketIds == null || authorizedBucketIds.isEmpty()) {
        // not authorized for any bucket, return empty list of items
        return Response.status(Response.Status.OK).entity(new ArrayList<>()).build();
    }

    // Since we are using the filter params which are optional in the service layer, we need to validate these path params here

    if (StringUtils.isBlank(groupId)) {
        throw new IllegalArgumentException("Group id cannot be null or blank");
    }

    if (StringUtils.isBlank(artifactId)) {
        throw new IllegalArgumentException("Artifact id cannot be null or blank");
    }

    if (StringUtils.isBlank(version)) {
        throw new IllegalArgumentException("Version cannot be null or blank");
    }

    final ExtensionBundleVersionFilterParams filterParams = ExtensionBundleVersionFilterParams.of(groupId,
            artifactId, version);

    final SortedSet<ExtensionBundleVersionMetadata> bundleVersions = registryService
            .getExtensionBundleVersions(authorizedBucketIds, filterParams);
    if (bundleVersions.isEmpty()) {
        throw new ResourceNotFoundException(
                "An extension bundle version does not exist with the specific group, artifact, and version");
    } else {
        ExtensionBundleVersionMetadata latestVersionMetadata = null;
        for (ExtensionBundleVersionMetadata versionMetadata : bundleVersions) {
            if (latestVersionMetadata == null
                    || versionMetadata.getTimestamp() > latestVersionMetadata.getTimestamp()) {
                latestVersionMetadata = versionMetadata;
            }
        }
        return Response.ok(latestVersionMetadata.getSha256(), MediaType.TEXT_PLAIN).build();
    }
}

---

From source file:com.spotify.heroic.filter.impl.OrFilterImpl.java

private static Filter optimize(SortedSet<Filter> statements) {
    final SortedSet<Filter> result = new TreeSet<>();

    root: for (final Filter f : statements) {
        if (f instanceof Filter.Not) {
            final Filter.Not not = (Filter.Not) f;

            if (statements.contains(not.first())) {
                return TrueFilterImpl.get();
            }//from   ww w  .  j a  v a2 s  . c o m

            result.add(f);
            continue;
        }

        if (f instanceof Filter.StartsWith) {
            final Filter.StartsWith outer = (Filter.StartsWith) f;

            for (final Filter inner : statements) {
                if (inner.equals(outer)) {
                    continue;
                }

                if (inner instanceof Filter.StartsWith) {
                    final Filter.StartsWith starts = (Filter.StartsWith) inner;

                    if (!outer.first().equals(starts.first())) {
                        continue;
                    }

                    if (FilterComparatorUtils.prefixedWith(outer.second(), starts.second())) {
                        continue root;
                    }
                }
            }

            result.add(f);
            continue;
        }

        // all ok!
        result.add(f);
    }

    if (result.isEmpty()) {
        return TrueFilterImpl.get();
    }

    if (result.size() == 1) {
        return result.iterator().next();
    }

    return new OrFilterImpl(new ArrayList<>(result));
}

---

From source file:org.mousephenotype.dcc.crawler.Downloader.java

private void downloadFiles() throws InterruptedException {
    ExecutorService workers = Executors.newFixedThreadPool(poolSize);
    while (true) {
        SortedSet<FileSourceHasZip> f = getActionAndSources();
        if (f == null || f.isEmpty()) {
            logger.info("No download pending; downloader will now exit");
            break;
        } else {/*  w  ww  .j a v  a  2 s.c om*/
            ZipDownload zd = attemptDownload(f);
            if (zd != null) {
                logger.debug("Successfully downloaded '{}'... will now extract contents",
                        zd.getZfId().getZaId().getZipId().getFileName());
                workers.submit(new XmlExtractor(backupDir, zd));
            }
        }
    }
    workers.shutdown();
    workers.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
}

---

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