Example usage for com.google.common.collect Iterables get

List of usage examples for com.google.common.collect Iterables get

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Introduction

In this page you can find the example usage for com.google.common.collect Iterables get.

Prototype

public static <T> T get(Iterable<T> iterable, int position)

Source Link

Document

Returns the element at the specified position in an iterable.

Usage

From source file:com.opengamma.strata.report.framework.expression.IterableTokenEvaluator.java

@Override
public EvaluationResult evaluate(Iterable<?> iterable, CalculationFunctions functions, String firstToken,
        List<String> remainingTokens) {

    String token = firstToken.toLowerCase(Locale.ENGLISH);
    Integer index = Ints.tryParse(token);

    if (index != null) {
        try {//from  w ww . j ava 2  s .  co  m
            return EvaluationResult.success(Iterables.get(iterable, index), remainingTokens);
        } catch (IndexOutOfBoundsException e) {
            return invalidTokenFailure(iterable, token);
        }
    }
    Set<String> tokens = tokens(iterable);

    for (Object item : iterable) {
        if (!fieldValues(item).contains(token)) {
            continue;
        }
        if (!tokens.contains(token)) {
            return ambiguousTokenFailure(iterable, token);
        }
        return EvaluationResult.success(item, remainingTokens);
    }
    return invalidTokenFailure(iterable, token);
}

From source file:brooklyn.entity.waratek.cloudvm.WaratekNodePlacementStrategy.java

@Override
public List<Location> locationsForAdditions(Multimap<Location, Entity> currentMembers,
        Collection<? extends Location> locs, int numToAdd) {
    if (locs.isEmpty() && numToAdd > 0) {
        throw new IllegalArgumentException(
                "No locations supplied, when requesting locations for " + numToAdd + " nodes");
    }/*from www .j a  v  a 2  s .com*/

    List<WaratekMachineLocation> available = Lists
            .newArrayList(Iterables.filter(locs, WaratekMachineLocation.class));
    int remaining = numToAdd;
    for (WaratekMachineLocation machine : available) {
        remaining -= machine.getAvailableJvcCount();
    }
    if (LOG.isDebugEnabled()) {
        LOG.debug("Requested {}, Need {} more from new JVMs, Current JVMs {}", new Object[] { numToAdd,
                remaining, Iterables.toString(Iterables.transform(locs, identity())) });
    }

    if (remaining > 0) {
        // FIXME what happens if there are no JVMs available?
        WaratekMachineLocation machine = Iterables.get(available, 0);

        // Grow the JVM cluster; based on max number of JVCs
        int maxSize = machine.getMaxSize();
        int delta = (remaining / maxSize) + (remaining % maxSize > 0 ? 1 : 0);
        Collection<Entity> added = machine.getWaratekInfrastructure().getVirtualMachineCluster()
                .resizeByDelta(delta);
        if (LOG.isDebugEnabled()) {
            LOG.debug("Added {} JVMs: {}", delta, Iterables.toString(Iterables.transform(added, identity())));
        }

        // Add the newly created locations for each JVM
        // TODO wait until all JVMs have started up?
        Collection<WaratekMachineLocation> jvms = Collections2.transform(added,
                new Function<Entity, WaratekMachineLocation>() {
                    @Override
                    public WaratekMachineLocation apply(@Nullable Entity input) {
                        return ((JavaVirtualMachine) input).getDynamicLocation();
                    }
                });
        available.addAll(jvms);
    }

    // Logic from parent, with enhancements and types
    List<Location> result = Lists.newArrayList();
    Map<WaratekMachineLocation, Integer> sizes = toAvailableLocationSizes(available);
    for (int i = 0; i < numToAdd; i++) {
        WaratekMachineLocation smallest = null;
        int minSize = 0;
        for (WaratekMachineLocation loc : sizes.keySet()) {
            int size = sizes.get(loc);
            if (smallest == null || size < minSize) {
                smallest = loc;
                minSize = size;
            }
        }
        Preconditions.checkState(smallest != null, "smallest was null; locs=%s", sizes.keySet());
        result.add(smallest);

        // Update population in locations, removing if maximum reached
        int maxSize = smallest.getMaxSize();
        int currentSize = sizes.get(smallest) + 1;
        if (currentSize < maxSize) {
            sizes.put(smallest, currentSize);
        } else {
            sizes.remove(smallest);
        }
    }

    if (LOG.isDebugEnabled()) {
        LOG.debug("Placement for {} nodes: {}", numToAdd,
                Iterables.toString(Iterables.transform(result, identity())));
    }
    return result;
}

From source file:ru.parallel.octotron.core.persistence.GraphManager.java

private GraphEntity GetEntity(IUniqueID<?> id) {
    Collection<GraphLink> links = graph_service.GetLinks("AID", id.GetID());
    Collection<GraphObject> objects = graph_service.GetObjects("AID", id.GetID());

    if (!links.isEmpty() && !objects.isEmpty())
        throw new ExceptionModelFail("found few entities with the same id: " + id.GetID());

    if (objects.size() == 1)
        return Iterables.get(objects, 0);
    else if (objects.size() > 1)
        throw new ExceptionModelFail("found multiple objects with AID: " + id.GetID());

    if (links.size() == 1)
        return Iterables.get(links, 0);
    else if (links.size() > 1)
        throw new ExceptionModelFail("found multiple links with AID: " + id.GetID());

    throw new ExceptionModelFail("could not get entity for AID: " + id.GetID());
}

From source file:net.lldp.checksims.algorithm.similaritymatrix.output.MatrixThresholdPrinter.java

/**
 * Print significant results in a similarity matrix.
 *
 * @param matrix Matrix to print//from   w ww. j a v a2 s.c  om
 * @return Results in matrix over threshold
 * @throws InternalAlgorithmError Thrown on internal error processing matrix
 */
@Override
public String printMatrix(SimilarityMatrix matrix) throws InternalAlgorithmError {
    checkNotNull(matrix);

    StringBuilder builder = new StringBuilder();
    DecimalFormat formatter = new DecimalFormat("0.##");

    ImmutableSet<AlgorithmResults> results = matrix.getBaseResults();

    Set<AlgorithmResults> filteredBelowThreshold = results.stream().filter(
            (result) -> result.percentMatchedA().gtEQ(threshold) || result.percentMatchedB().gtEQ(threshold))
            .collect(Collectors.toCollection(HashSet::new));

    if (filteredBelowThreshold.isEmpty()) {
        builder.append("No significant matches found.\n");
    }

    // Loop until all results over threshold consumed
    while (!filteredBelowThreshold.isEmpty()) {
        // Find the largest single result
        Real largest = Real.ZERO;
        AlgorithmResults largestResult = Iterables.get(filteredBelowThreshold, 0);
        for (AlgorithmResults result : filteredBelowThreshold) {
            if (result.percentMatchedA().greaterThan(largest)) {
                largest = result.percentMatchedA();
                largestResult = result;
            }
            if (result.percentMatchedB().greaterThan(largest)) {
                largest = result.percentMatchedB();
                largestResult = result;
            }
        }

        Real largerOfTwo;
        Real smallerOfTwo;
        Submission largerSubmission;
        Submission smallerSubmission;

        if (largestResult.percentMatchedA().greaterThanEqualTo(largestResult.percentMatchedB())) {
            largerOfTwo = largestResult.percentMatchedA().multiply(new Real(100));
            smallerOfTwo = largestResult.percentMatchedB().multiply(new Real(100));
            largerSubmission = largestResult.a;
            smallerSubmission = largestResult.b;
        } else {
            largerOfTwo = largestResult.percentMatchedB().multiply(new Real(100));
            smallerOfTwo = largestResult.percentMatchedA().multiply(new Real(100));
            largerSubmission = largestResult.b;
            smallerSubmission = largestResult.a;
        }

        // We have the largest single result, print it
        builder.append("Found match of ");
        builder.append(formatter.format(largerOfTwo.asDouble()));
        builder.append("% (inverse match ");
        builder.append(formatter.format(smallerOfTwo.asDouble()));
        builder.append("%) between submissions \"");
        builder.append(largerSubmission.getName());
        builder.append("\" and \"");
        builder.append(smallerSubmission.getName());
        builder.append("\"\n");

        // Remove the largest results
        filteredBelowThreshold.remove(largestResult);
    }

    return builder.toString();
}

From source file:org.jclouds.compute.callables.InitAndStartScriptOnNode.java

protected ExecResponse runCommand(String command) {
    ExecResponse returnVal;//from www  .  j ava  2  s . c om
    logger.debug(">> running [%s] as %s@%s",
            command.replace(node.getAdminPassword() != null ? node.getAdminPassword() : "XXXXX", "XXXXX"),
            node.getCredentials().identity, Iterables.get(node.getPublicAddresses(), 0));
    returnVal = ssh.exec(command);
    return returnVal;
}

From source file:org.jclouds.location.suppliers.OnlyLocationOrFirstZoneOrRegionMatchingRegionId.java

@Override
@Singleton//from   w ww.j  a  va2 s . c om
public Location get() {
    Set<? extends Location> locations = locationsSupplier.get();
    if (locationsSupplier.get().size() == 1)
        return getOnlyElement(locationsSupplier.get());
    IsRegionAndIdEqualsOrIsZoneParentIdEquals matcher = null;
    try {
        String region = injector.getInstance(Key.get(String.class, Region.class));
        if (region == null)
            return Iterables.get(locationsSupplier.get(), 0);
        matcher = injector.getInstance(IsRegionAndIdEqualsOrIsZoneParentIdEquals.class);
        Location toReturn = Iterables.find(locations, matcher);
        return toReturn.getScope() == LocationScope.REGION ? toReturn : toReturn.getParent();
    } catch (NoSuchElementException e) {
        throw new IllegalStateException(String.format("region %s not found in %s", matcher, locations));
    }
}

From source file:com.google.javascript.jscomp.J2clConstantHoisterPass.java

private void maybeHoistClassField(Collection<Node> assignments, Collection<Node> hoistableFunctions) {
    // The field is only assigned twice:
    if (assignments.size() != 2) {
        return;/*  w  ww.j  a  v  a2  s . c o  m*/
    }

    Node first = Iterables.get(assignments, 0);
    Node second = Iterables.get(assignments, 1);

    // One of them is the top level declaration and the other is the assignment in clinit.
    Node topLevelDeclaration = isClassFieldDeclaration(first) ? first : second;
    Node clinitAssignment = isClinitFieldAssignment(first) ? first : second;
    if (!isClassFieldDeclaration(topLevelDeclaration) || !isClinitFieldAssignment(clinitAssignment)) {
        return;
    }

    // And it is assigned to a literal value; hence could be used in static eval and safe to move:
    Node assignmentRhs = clinitAssignment.getSecondChild();
    if (!NodeUtil.isLiteralValue(assignmentRhs, true /* includeFunctions */)
            || (assignmentRhs.isFunction() && !hoistableFunctions.contains(assignmentRhs))) {
        return;
    }

    // And the assignment are in the same script:
    if (NodeUtil.getEnclosingScript(clinitAssignment) != NodeUtil.getEnclosingScript(topLevelDeclaration)) {
        return;
    }

    // At this point the only case some could observe the declaration value is the when you have
    // cycle between clinits and the field is accessed before initialization; which is almost always
    // a bug and GWT never assumed this state is observable in its optimization, yet nobody
    // complained. So it is safe to upgrade it to a constant.
    hoistConstantLikeField(clinitAssignment, topLevelDeclaration);
}

From source file:org.jclouds.virtualbox.functions.IMachineToSshClient.java

@Override
public SshClient apply(final IMachine vm) {
    String sshPort = "22";
    String guestIdentity = vm.getExtraData(GUEST_OS_USER);
    String guestCredential = vm.getExtraData(GUEST_OS_PASSWORD);
    LoginCredentials loginCredentials = LoginCredentials.builder().user(guestIdentity).password(guestCredential)
            .authenticateSudo(true).build();

    String clientIpAddress = null;

    long nicSlot = 0;
    while (nicSlot < 4 && Strings.isNullOrEmpty(clientIpAddress)) {
        INetworkAdapter networkAdapter = vm.getNetworkAdapter(nicSlot);

        if (networkAdapter.getAttachmentType().equals(NetworkAttachmentType.NAT)) {
            for (String nameProtocolnumberAddressInboudportGuestTargetport : networkAdapter.getNATEngine()
                    .getRedirects()) {/*from  w  w  w.j  a v a2 s .c  o  m*/
                Iterable<String> stuff = Splitter.on(',')
                        .split(nameProtocolnumberAddressInboudportGuestTargetport);
                String protocolNumber = Iterables.get(stuff, 1);
                String hostAddress = Iterables.get(stuff, 2);
                String inboundPort = Iterables.get(stuff, 3);
                String targetPort = Iterables.get(stuff, 5);
                if ("1".equals(protocolNumber) && "22".equals(targetPort)) {
                    clientIpAddress = hostAddress;
                    sshPort = inboundPort;
                }
            }
        } else if (networkAdapter.getAttachmentType().equals(NetworkAttachmentType.Bridged)) {
            clientIpAddress = networkUtils.getIpAddressFromNicSlot(vm.getName(), networkAdapter.getSlot());
        } else if (networkAdapter.getAttachmentType().equals(NetworkAttachmentType.HostOnly)) {
            clientIpAddress = networkUtils.getValidHostOnlyIpFromVm(vm.getName());
        }
        nicSlot++;
    }
    return sshClientFactory.create(HostAndPort.fromParts(clientIpAddress, Integer.parseInt(sshPort)),
            loginCredentials);
}

From source file:com.google.errorprone.bugpatterns.collectionincompatibletype.TypeArgOfMethodArgMatcher.java

@Override
Type extractSourceType(MethodInvocationTree tree, VisitorState state) {
    return extractTypeArgAsMemberOfSupertype(
            ASTHelpers.getType(Iterables.get(tree.getArguments(), methodArgIndex)),
            state.getSymbolFromString(methodArgTypeName), methodArgTypeArgIndex, state.getTypes());
}

From source file:org.richfaces.servlet.PushServletContainerInitializer.java

public void onStartup(Set<Class<?>> clasess, ServletContext servletContext) throws ServletException {
    if (Boolean.valueOf(servletContext.getInitParameter(SKIP_SERVLET_REGISTRATION_PARAM))) {
        return;/*w ww . j a v  a2s  .co m*/
    }

    if (!isAtmospherePresent()) {
        return;
    }

    if (hasFilterMapping(PushFilter.class, servletContext)) {
        return;
    }

    try {
        String pushHandlerMapping;

        ServletRegistration servletRegistration = getServletRegistration(PushServlet.class, servletContext);
        if (servletRegistration == null) {
            registerPushServlet(servletContext);
            pushHandlerMapping = PUSH_CONTEXT_DEFAULT_MAPPING;
        } else {
            pushHandlerMapping = Iterables.get(servletRegistration.getMappings(), 0);
        }

        servletContext.setAttribute(PushContextFactoryImpl.PUSH_HANDLER_MAPPING_ATTRIBUTE, pushHandlerMapping);
    } catch (Exception e) {
        servletContext.log(
                MessageFormat.format("Exception registering RichFaces Push Servlet: {0]", e.getMessage()), e);
    }
}