Examples with Predicate java.util.function.Predicate used on opensource projects

Example 11 with Predicate

use of java.util.function.Predicate in project neo4j by neo4j.

the class TestBidirectionalTraversal method mirroredTraversalReversesInitialState.

@Test
public void mirroredTraversalReversesInitialState() throws Exception {
    /*
         * (a)-->(b)-->(c)-->(d)
         */
    createGraph("a TO b", "b TO c", "c TO d");
    BranchCollisionPolicy collisionPolicy = new BranchCollisionPolicy() {

        @Override
        public BranchCollisionDetector create(Evaluator evaluator, Predicate<Path> pathPredicate) {
            return new StandardBranchCollisionDetector(null, null) {

                @Override
                protected boolean includePath(Path path, TraversalBranch startPath, TraversalBranch endPath) {
                    assertEquals(0, startPath.state());
                    assertEquals(10, endPath.state());
                    return true;
                }
            };
        }
    };
    Iterables.count(getGraphDb().bidirectionalTraversalDescription().mirroredSides(getGraphDb().traversalDescription().uniqueness(NODE_PATH).expand(PathExpanders.<Integer>forType(to), new InitialBranchState.State<>(0, 10))).collisionPolicy(collisionPolicy).traverse(getNodeWithName("a"), getNodeWithName("d")));
}

Example 12 with Predicate

use of java.util.function.Predicate in project neo4j by neo4j.

the class ClusterManager method allSeesAllAsJoined.

public static Predicate<ManagedCluster> allSeesAllAsJoined() {
    return new Predicate<ManagedCluster>() {

        @Override
        public boolean test(ManagedCluster cluster) {
            int clusterSize = cluster.size();
            int clusterMembersChecked = 0;
            for (HighlyAvailableGraphDatabase database : cluster.getAllMembers()) {
                clusterMembersChecked++;
                ClusterMembers members = database.getDependencyResolver().resolveDependency(ClusterMembers.class);
                if (count(members.getMembers()) < clusterSize) {
                    return false;
                }
            }
            for (ObservedClusterMembers arbiter : cluster.getArbiters()) {
                clusterMembersChecked++;
                if (count(arbiter.getMembers()) < clusterSize) {
                    return false;
                }
            }
            // Everyone sees everyone else as joined!
            return clusterMembersChecked > 0;
        }

        @Override
        public String toString() {
            return "All instances should see all others as joined";
        }
    };
}

Example 13 with Predicate

use of java.util.function.Predicate in project helios by spotify.

the class HostsResource method list.

/**
   * Returns the list of hostnames of known hosts/agents.
   * @return The list of hostnames.
   */
@GET
@Produces(APPLICATION_JSON)
@Timed
@ExceptionMetered
public List<String> list(@QueryParam("namePattern") final String namePattern, @QueryParam("selector") final List<String> hostSelectors) {
    List<String> hosts = model.listHosts();
    if (namePattern != null) {
        final Predicate<String> matchesPattern = Pattern.compile(namePattern).asPredicate();
        hosts = hosts.stream().filter(matchesPattern).collect(Collectors.toList());
    }
    if (!hostSelectors.isEmpty()) {
        // check that all supplied selectors are parseable/valid
        final List<HostSelector> selectors = hostSelectors.stream().map(selectorStr -> {
            final HostSelector parsed = HostSelector.parse(selectorStr);
            if (parsed == null) {
                throw new WebApplicationException(Response.status(Response.Status.BAD_REQUEST).entity("Invalid host selector: " + selectorStr).build());
            }
            return parsed;
        }).collect(Collectors.toList());
        final Map<String, Map<String, String>> hostsAndLabels = getLabels(hosts);
        final HostMatcher matcher = new HostMatcher(hostsAndLabels);
        hosts = matcher.getMatchingHosts(selectors);
    }
    return hosts;
}

Example 14 with Predicate

use of java.util.function.Predicate in project platform_frameworks_base by android.

the class RecentsProvider method call.

@Override
public Bundle call(String method, String arg, Bundle extras) {
    if (METHOD_PURGE.equals(method)) {
        // Purge references to unknown authorities
        final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
        final Set<String> knownAuth = Sets.newHashSet();
        for (ResolveInfo info : getContext().getPackageManager().queryIntentContentProviders(intent, 0)) {
            knownAuth.add(info.providerInfo.authority);
        }
        purgeByAuthority(new Predicate<String>() {

            @Override
            public boolean test(String authority) {
                // Purge unknown authorities
                return !knownAuth.contains(authority);
            }
        });
        return null;
    } else if (METHOD_PURGE_PACKAGE.equals(method)) {
        // Purge references to authorities in given package
        final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
        intent.setPackage(arg);
        final Set<String> packageAuth = Sets.newHashSet();
        for (ResolveInfo info : getContext().getPackageManager().queryIntentContentProviders(intent, 0)) {
            packageAuth.add(info.providerInfo.authority);
        }
        if (!packageAuth.isEmpty()) {
            purgeByAuthority(new Predicate<String>() {

                @Override
                public boolean test(String authority) {
                    // Purge authority matches
                    return packageAuth.contains(authority);
                }
            });
        }
        return null;
    } else {
        return super.call(method, arg, extras);
    }
}

Example 15 with Predicate

use of java.util.function.Predicate in project cassandra by apache.

the class CompactionController method getPurgeEvaluator.

/**
     * @param key
     * @return a predicate for whether tombstones marked for deletion at the given time for the given partition are
     * purgeable; we calculate this by checking whether the deletion time is less than the min timestamp of all SSTables
     * containing his partition and not participating in the compaction. This means there isn't any data in those
     * sstables that might still need to be suppressed by a tombstone at this timestamp.
     */
public Predicate<Long> getPurgeEvaluator(DecoratedKey key) {
    if (NEVER_PURGE_TOMBSTONES || !compactingRepaired())
        return time -> false;
    overlapIterator.update(key);
    Set<SSTableReader> filteredSSTables = overlapIterator.overlaps();
    Iterable<Memtable> memtables = cfs.getTracker().getView().getAllMemtables();
    long minTimestampSeen = Long.MAX_VALUE;
    boolean hasTimestamp = false;
    for (SSTableReader sstable : filteredSSTables) {
        // we check index file instead.
        if (sstable.getBloomFilter() instanceof AlwaysPresentFilter && sstable.getPosition(key, SSTableReader.Operator.EQ, false) != null || sstable.getBloomFilter().isPresent(key)) {
            minTimestampSeen = Math.min(minTimestampSeen, sstable.getMinTimestamp());
            hasTimestamp = true;
        }
    }
    for (Memtable memtable : memtables) {
        Partition partition = memtable.getPartition(key);
        if (partition != null) {
            minTimestampSeen = Math.min(minTimestampSeen, partition.stats().minTimestamp);
            hasTimestamp = true;
        }
    }
    if (!hasTimestamp)
        return time -> true;
    else {
        final long finalTimestamp = minTimestampSeen;
        return time -> time < finalTimestamp;
    }
}