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

Introduction

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

Prototype

@Nullable
public static <T> T getFirst(Iterable<? extends T> iterable, @Nullable T defaultValue)

Source Link

Document

Returns the first element in iterable or defaultValue if the iterable is empty.

Usage

From source file:com.palantir.atlasdb.shell.AtlasShellConnectionDialogModel.java

public void setSavedDbConnections(List<String> savedDbConnections) {
    this.savedDbConnections = savedDbConnections;
    this.setSelectedItem(Iterables.getFirst(this.savedDbConnections, null));
    this.update();
}

From source file:org.loadui.testfx.service.finder.impl.NodeFinderImpl.java

public Node node(Predicate<Node> predicate) {
    Set<Node> resultNodes = nodes(predicate);
    return Iterables.getFirst(resultNodes, null);
}

From source file:com.github.blacklocus.rdsecho.utl.Route53Find.java

public Optional<ResourceRecordSet> resourceRecordSet(final String hostedZoneId,
        final Predicate<ResourceRecordSet> predicate) {
    return Optional.fromNullable(Iterables.getFirst(resourceRecordSets(hostedZoneId, predicate), null));
}

From source file:org.janusgraph.graphdb.database.idassigner.placement.PropertyPlacementStrategy.java

private int getPartitionIDbyKey(JanusGraphVertex vertex) {
    Preconditions.checkState(idManager != null && key != null,
            "PropertyPlacementStrategy has not been initialized correctly");
    assert idManager.getPartitionBound() <= Integer.MAX_VALUE;
    int partitionBound = (int) idManager.getPartitionBound();
    JanusGraphVertexProperty p = (JanusGraphVertexProperty) Iterables
            .getFirst(vertex.query().keys(key).properties(), null);
    if (p == null)
        return -1;
    int hashPid = Math.abs(p.value().hashCode()) % partitionBound;
    assert hashPid >= 0 && hashPid < partitionBound;
    if (isExhaustedPartition(hashPid)) {
        //We keep trying consecutive partition ids until we find a non-exhausted one
        int newPid = hashPid;
        do {/* www .  j a  v  a 2  s .  c o m*/
            newPid = (newPid + 1) % partitionBound;
            if (newPid == hashPid) //We have gone full circle - no more ids to try
                throw new IDPoolExhaustedException("Could not find non-exhausted partition");
        } while (isExhaustedPartition(newPid));
        return newPid;
    } else
        return hashPid;
}

From source file:org.apache.metron.stellar.dsl.functions.OrdinalFunctions.java

private static Comparable orderList(Iterable<Comparable> list, BiFunction<Comparable, Comparable, Boolean> eval,
        String funcName) {/*from  ww w  .j  a  v a 2  s.c  om*/
    if (Iterables.isEmpty(list)) {
        return null;
    }
    Object o = Iterables.getFirst(list, null);
    Comparable ret = null;
    for (Object valueVal : list) {
        if (valueVal == null) {
            continue;
        }
        Comparable value = null;
        if (!(valueVal instanceof Comparable)) {
            throw new IllegalStateException(
                    "Noncomparable object type " + valueVal.getClass().getName() + " submitted to " + funcName);
        } else {
            value = (Comparable) valueVal;
        }
        try {
            Comparable convertedRet = ConversionUtils.convert(ret, value.getClass());
            if (convertedRet == null && ret != null) {
                throw new IllegalStateException("Incomparable objects were submitted to " + funcName + ": "
                        + ret.getClass() + " is incomparable to " + value.getClass());
            }
            if (ret == null || eval.apply(convertedRet, value)) {
                ret = value;
            }
        } catch (ClassCastException cce) {
            throw new IllegalStateException(
                    "Incomparable objects were submitted to " + funcName + ": " + cce.getMessage(), cce);
        }
    }
    return ret;
}

From source file:me.emmy.db.MySQLLayer.java

public Optional<PlayerLocationRecord> find(final Player player) {
    return Optional.fromNullable(Iterables.getFirst(
            jdbc.query(selectQuery, new Object[] { player.getName() }, LocationMapper.instance), null));
}

From source file:org.obm.sync.server.Request.java

public String getClientIP() {
    String xForwardedFor = req.getHeader("X-Forwarded-For");
    if (StringUtils.isBlank(xForwardedFor)) {
        return req.getRemoteAddr();
    }//from   www.  j a  v  a2s .  com
    Iterable<String> ips = Splitter.on(',').trimResults().split(xForwardedFor);
    return Iterables.getFirst(ips, req.getRemoteAddr());
}

From source file:org.jboss.hal.ballroom.LabelBuilder.java

/**
 * Turns a list of names from the management model into a human readable enumeration wrapped in quotes and
 * separated with commas. The last name is separated with the specified conjunction.
 *
 * @return The list of names as human readable string or an empty string if the names are null or empty.
 *///from  www .  j  a  v a 2s .  c o  m
public String enumeration(Iterable<String> names, String conjunction) {
    String enumeration = "";
    if (names != null && !Iterables.isEmpty(names)) {
        int size = Iterables.size(names);
        if (size == 1) {
            return QUOTE + label(names.iterator().next()) + QUOTE;
        } else if (size == 2) {
            return QUOTE + label(Iterables.getFirst(names, "")) + QUOTE + SPACE + conjunction + SPACE + QUOTE
                    + label(Iterables.getLast(names)) + QUOTE;
        } else {
            String last = Iterables.getLast(names);
            LinkedList<String> allButLast = new LinkedList<>();
            Iterables.addAll(allButLast, names);
            allButLast.removeLast();
            enumeration = allButLast.stream().map(name -> QUOTE + label(name) + QUOTE)
                    .collect(Collectors.joining(", "));
            enumeration = enumeration + SPACE + conjunction + SPACE + QUOTE + label(last) + QUOTE;
        }
    }
    return enumeration;
}

From source file:com.android.tools.idea.navigator.nodes.AndroidManifestsGroupNode.java

@Nullable
private VirtualFile findFileToOpen(@NotNull Set<VirtualFile> files) {
    VirtualFile bestFile = Iterables.getFirst(files, null);

    PsiManager psiManager = PsiManager.getInstance(myProject);
    for (VirtualFile f : files) {
        PsiFile psiFile = psiManager.findFile(f);
        if (psiFile == null) {
            continue;
        }//  ww w  .  j  a  v  a 2  s.  c o m

        IdeaSourceProvider sourceProvider = AndroidManifestFileNode.getSourceProvider(getValue(), psiFile);
        if (sourceProvider != null && SdkConstants.FD_MAIN.equals(sourceProvider.getName())) {
            bestFile = f;
        }
    }

    return bestFile;
}

From source file:org.jbpm.workbench.common.client.list.AbstractMultiGridView.java

protected void controlBulkOperations(final ListTable<T> extendedPagedTable) {
    enableWidgets(Iterables.getFirst(extendedPagedTable.getRightActionsToolbar(), null),
            extendedPagedTable.hasSelectedItems());
}