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

Introduction

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

Prototype

public static <T> T getOnlyElement(Iterable<T> iterable)

Source Link

Document

Returns the single element contained in iterable .

Usage

From source file:org.jclouds.fujitsu.fgcp.location.SystemAndNetworkSegmentToLocationSupplier.java

@Override
public Set<Location> get() {
    Builder<Location> locations = ImmutableSet.builder();

    for (VSystem system : api.getVirtualDCApi().listVirtualSystems()) {

        VSystemWithDetails systemWithDetails = api.getVirtualSystemApi().getDetails(system.getId());

        Location systemLocation = new LocationBuilder().scope(LocationScope.SYSTEM)
                .parent(Iterables.getOnlyElement(regionProvider.get())).description(system.getName())
                .id(system.getId()).build();

        for (VNet net : systemWithDetails.getNetworks()) {

            locations.add(new LocationBuilder().scope(LocationScope.NETWORK).parent(systemLocation)
                    .description(net.getNetworkId().replaceFirst(".+-N-", "")).id(net.getNetworkId()).build());
        }/*from ww w  .  j a  va  2s  .c  om*/
    }

    return locations.build();
}

From source file:see.util.Either.java

/**
 * Get left value, throwing exception if value is not present.
 * @return left value/*from  w w w . j  av a  2  s .  c  o  m*/
 * @throws NoSuchElementException if container doesn't hold left value
 */
public L leftValue() {
    return Iterables.getOnlyElement(left);
}

From source file:com.google.devtools.build.lib.bazel.rules.genrule.GenRule.java

private Artifact getExecutable(RuleContext ruleContext, NestedSet<Artifact> filesToBuild) {
    if (Iterables.size(filesToBuild) == 1) {
        Artifact out = Iterables.getOnlyElement(filesToBuild);
        if (ruleContext.attributes().get("executable", Type.BOOLEAN)) {
            return out;
        }/*from w  w  w.  j  av a  2s .c  om*/
    }
    return null;
}

From source file:com.google.caliper.worker.MicrobenchmarkWorker.java

private Trial createTrial(Benchmark benchmark, String methodName, Options options, WorkerEventLog log) {
    final String timeMethodName = "time" + methodName;
    // where's the right place for 'time' to be prepended again?
    Iterable<Method> timeMethods = Iterables.filter(Arrays.asList(benchmark.getClass().getDeclaredMethods()),
            new Predicate<Method>() {
                @Override//from w  w w .  jav a2  s  .co m
                public boolean apply(@Nullable Method input) {
                    return timeMethodName.equals(input.getName());
                }
            });

    Method timeMethod = Iterables.getOnlyElement(timeMethods);
    timeMethod.setAccessible(true);

    Class<?> repsType = Iterables.getOnlyElement(Arrays.asList(timeMethod.getParameterTypes()));
    if (int.class.equals(repsType)) {
        return new IntTrial(benchmark, timeMethod, options, log);
    } else if (long.class.equals(repsType)) {
        return new LongTrial(benchmark, timeMethod, options, log);
    } else {
        throw new IllegalStateException(
                String.format("Got a benchmark method (%s) with an invalid reps parameter.", timeMethod));
    }
}

From source file:com.opengamma.financial.analytics.model.discounting.DiscountingInflationParSpreadFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new DiscountingInflationCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), false) {

        @Override//from   w w  w.j  a  v a2 s  .co m
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final InflationProviderInterface data = (InflationProviderInterface) inputs.getValue(CURVE_BUNDLE);
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final ValueProperties properties = desiredValue.getConstraints().copy().get();
            final double parSpread = derivative.accept(CALCULATOR, data);
            final ValueSpecification spec = new ValueSpecification(PAR_SPREAD, target.toSpecification(),
                    properties);
            return Collections.singleton(new ComputedValue(spec, parSpread));
        }
    };
}

From source file:com.google.errorprone.bugpatterns.time.JavaDurationWithNanos.java

@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
    if (!MATCHER.matches(tree, state)) {
        return Description.NO_MATCH;
    }//from w  w  w .j  ava 2 s  . com

    SuggestedFix.Builder builder = SuggestedFix.builder();
    ExpressionTree nanosArg = Iterables.getOnlyElement(tree.getArguments());
    ExpressionTree receiver = ASTHelpers.getReceiver(tree);
    String replacement = SuggestedFixes.qualifyType(state, builder, "java.time.Duration") + ".ofSeconds("
            + state.getSourceForNode(receiver) + ".getSeconds(), ";

    builder.replace(((JCTree) tree).getStartPosition(), ((JCTree) nanosArg).getStartPosition(), replacement);
    return describeMatch(tree, builder.build());
}

From source file:org.apache.beam.runners.dataflow.worker.DataflowProcessFnRunner.java

private static <T> void checkTrivialOuterWindows(WindowedValue<KeyedWorkItem<byte[], T>> windowedKWI) {
    // In practice it will be in 0 or 1 windows (ValueInEmptyWindows or ValueInGlobalWindow)
    Collection<? extends BoundedWindow> outerWindows = windowedKWI.getWindows();
    if (!outerWindows.isEmpty()) {
        checkArgument(outerWindows.size() == 1,
                "The KeyedWorkItem itself must not be in multiple windows, but was in: %s", outerWindows);
        BoundedWindow onlyWindow = Iterables.getOnlyElement(outerWindows);
        checkArgument(onlyWindow instanceof GlobalWindow,
                "KeyedWorkItem must be in the Global window, but was in: %s", onlyWindow);
    }// w  ww . ja v a2s.  c  om
}

From source file:com.opengamma.financial.analytics.model.g2ppdiscounting.G2ppDiscountingPVFunction.java

@Override
public CompiledFunctionDefinition compile(final FunctionCompilationContext context, final Instant atInstant) {
    return new G2ppCompiledFunction(getTargetToDefinitionConverter(context),
            getDefinitionToDerivativeConverter(context), true) {

        @Override//from  w  w w . j  a va2  s .  c o m
        protected Set<ComputedValue> getValues(final FunctionExecutionContext executionContext,
                final FunctionInputs inputs, final ComputationTarget target,
                final Set<ValueRequirement> desiredValues, final InstrumentDerivative derivative,
                final FXMatrix fxMatrix) {
            final G2ppProviderInterface data = getMergedProviders(inputs, fxMatrix);
            final ValueRequirement desiredValue = Iterables.getOnlyElement(desiredValues);
            final ValueProperties properties = desiredValue.getConstraints().copy().get();
            final Currency currency = FinancialSecurityUtils.getCurrency(target.getTrade().getSecurity());
            final MultipleCurrencyAmount mca = derivative.accept(CALCULATOR, data);
            final ValueSpecification spec = new ValueSpecification(PRESENT_VALUE, target.toSpecification(),
                    properties);
            return Collections.singleton(new ComputedValue(spec, mca.getAmount(currency)));
        }
    };
}

From source file:brooklyn.entity.database.mysql.MySqlClusterTestHelper.java

public static void test(TestApplication app, Location location) throws Exception {
    MySqlCluster mysql = app.createAndManageChild(
            EntitySpec.create(MySqlCluster.class).configure(MySqlCluster.INITIAL_SIZE, 2).configure(
                    MySqlNode.MYSQL_SERVER_CONF, MutableMap.<String, Object>of("skip-name-resolve", "")));

    app.start(ImmutableList.of(location));
    log.info("MySQL started");
    MySqlNode masterEntity = (MySqlNode) mysql.getAttribute(MySqlCluster.FIRST);
    masterEntity.invoke(MySqlNode.EXECUTE_SCRIPT, ImmutableMap.of("commands", CREATION_SCRIPT)).asTask()
            .getUnchecked();//  w  ww .j a va2 s .c o  m

    VogellaExampleAccess masterDb = new VogellaExampleAccess("com.mysql.jdbc.Driver",
            mysql.getAttribute(MySqlNode.DATASTORE_URL));
    VogellaExampleAccess slaveDb = new VogellaExampleAccess("com.mysql.jdbc.Driver",
            Iterables.getOnlyElement(mysql.getAttribute(MySqlCluster.SLAVE_DATASTORE_URL_LIST)));
    masterDb.connect();
    slaveDb.connect();

    assertSlave(masterDb, slaveDb, 1);
    masterDb.modifyDataBase();
    assertSlave(masterDb, slaveDb, 2);
    masterDb.revertDatabase();
    assertSlave(masterDb, slaveDb, 1);

    masterDb.close();
    slaveDb.close();

    log.info("Ran vogella MySQL example -- SUCCESS");
}

From source file:at.ac.univie.isc.asio.database.MysqlSchemaService.java

private org.jooq.Schema findActiveSchema(final DSLContext jooq, final Id target) throws SQLException {
    final String activeSchemaName = target.asString();
    if (INTERNAL_SCHEMA.contains(activeSchemaName.toLowerCase(Locale.ENGLISH))) {
        throw new Id.NotFound(target);
    }//from www.j  ava  2  s .  c  om
    final org.jooq.Schema schema = Iterables.getOnlyElement(jooq.meta().getCatalogs())
            .getSchema(activeSchemaName);
    if (schema == null) {
        throw new Id.NotFound(target);
    }
    return schema;
}