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

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

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Introduction

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

Prototype

public static boolean isEmpty(Iterable<?> iterable)

Source Link

Document

Determines if the given iterable contains no elements.

Usage

From source file:com.facebook.presto.sql.ExpressionUtils.java

public static Expression binaryExpression(LogicalBinaryExpression.Type type, Iterable<Expression> expressions) {
    requireNonNull(type, "type is null");
    requireNonNull(expressions, "expressions is null");
    Preconditions.checkArgument(!Iterables.isEmpty(expressions), "expressions is empty");

    // build balanced tree for efficient recursive processing
    Queue<Expression> queue = new ArrayDeque<>(newArrayList(expressions));
    while (queue.size() > 1) {
        queue.add(new LogicalBinaryExpression(type, queue.remove(), queue.remove()));
    }//from   ww  w .j av  a2s .  c  o m
    return queue.remove();
}

From source file:fr.rjoakim.android.jonetouch.dialog.UpdateActionScriptMyDialog.java

private List<String> formatScriptValues() {
    String values = getEditTextValue(R.id.addOrUpdateActionScriptEditText);
    Iterable<String> iterable = Splitter.on(SEPARATOR).split(values);
    if (Iterables.isEmpty(iterable)) {
        return Lists.newArrayList(values.trim());
    } else {//from  ww w. ja v  a 2s .co m
        List<String> scripts = Lists.newArrayList();
        for (String s : iterable) {
            if (!Strings.isNullOrEmpty(s.trim())) {
                scripts.add(s);
            }
        }
        return scripts;
    }
}

From source file:org.nmdp.ngs.align.Alignments.java

/**
 * Return the maximum length in the specified ranges, or <code>-1</code> if ranges is empty.
 *
 * @param ranges ranges, must not be null, must not contain any null ranges, and all ranges must be [closed, open)
 * @return the maximum length in the specified ranges, or <code>-1</code> if ranges is empty
 *///from   w  ww  .  j  a va  2s  .c o m
public static long maximumLength(final Iterable<Range<Long>> ranges) {
    checkNotNull(ranges);
    if (Iterables.isEmpty(ranges)) {
        return -1L;
    }
    return Ordering.natural().max(lengths(ranges)).longValue();
}

From source file:org.gradle.api.reporting.model.internal.ModelNodeRenderer.java

private void maybePrintRules(ModelNode model, StyledTextOutput styledTextoutput) {
    Iterable<ModelRuleDescriptor> executedRules = uniqueExecutedRulesExcludingCreator(model);
    if (!Iterables.isEmpty(executedRules)) {
        printNestedAttributeTitle(styledTextoutput, "Rules:");
        for (ModelRuleDescriptor ruleDescriptor : executedRules) {
            printNestedAttribute(styledTextoutput, " " + ruleDescriptor.toString());
        }//from w  w  w .  jav a  2 s  . c om
    }
}

From source file:org.apache.cassandra.db.compaction.TimeWindowCompactionStrategy.java

/**
 *
 * @param gcBefore//from w w  w.j  a  va2 s.  c om
 * @return
 */
private synchronized List<SSTableReader> getNextBackgroundSSTables(final int gcBefore) {
    if (Iterables.isEmpty(cfs.getSSTables(SSTableSet.LIVE)))
        return Collections.emptyList();

    Set<SSTableReader> uncompacting = ImmutableSet
            .copyOf(filter(cfs.getUncompactingSSTables(), sstables::contains));

    // Find fully expired SSTables. Those will be included no matter what.
    Set<SSTableReader> expired = Collections.emptySet();

    if (System.currentTimeMillis() - lastExpiredCheck > options.expiredSSTableCheckFrequency) {
        logger.debug("TWCS expired check sufficiently far in the past, checking for fully expired SSTables");
        expired = CompactionController.getFullyExpiredSSTables(cfs, uncompacting,
                cfs.getOverlappingLiveSSTables(uncompacting), gcBefore);
        lastExpiredCheck = System.currentTimeMillis();
    } else {
        logger.debug("TWCS skipping check for fully expired SSTables");
    }

    Set<SSTableReader> candidates = Sets.newHashSet(filterSuspectSSTables(uncompacting));

    List<SSTableReader> compactionCandidates = new ArrayList<>(
            getNextNonExpiredSSTables(Sets.difference(candidates, expired), gcBefore));
    if (!expired.isEmpty()) {
        logger.debug("Including expired sstables: {}", expired);
        compactionCandidates.addAll(expired);
    }

    return compactionCandidates;
}

From source file:org.apache.flex.compiler.internal.targets.JSTarget.java

@Override
public IJSApplication build(Collection<ICompilerProblem> problems) {
    buildStarted();//from   www.  ja v a2 s  . co m
    try {
        Iterable<ICompilerProblem> fatalProblems = getFatalProblems();
        if (!Iterables.isEmpty(fatalProblems)) {
            Iterables.addAll(problems, fatalProblems);
            return null;
        }

        Set<ICompilationUnit> compilationUnitSet = new HashSet<ICompilationUnit>();
        Target.RootedCompilationUnits rootedCompilationUnits = getRootedCompilationUnits();
        Iterables.addAll(problems, rootedCompilationUnits.getProblems());

        compilationUnitSet.addAll(rootedCompilationUnits.getUnits());

        buildAndCollectProblems(compilationUnitSet, problems);

        List<ICompilationUnit> reachableCompilationUnits = project
                .getReachableCompilationUnitsInSWFOrder(rootedCompilationUnits.getUnits());

        IJSApplication application = initializeApplication(reachableCompilationUnits);

        //            ISWF swf = initializeSWF(reachableCompilationUnits);
        //
        //            // make main frame for DoABC tags
        //            final SWFFrame mainFrame = new SWFFrame();
        //            swf.addFrame(mainFrame);
        //
        //            // Add definitions.
        //            for (final ICompilationUnit cu : compilationUnitSet)
        //            {
        //                // ignore externals
        //                if (isLinkageExternal(cu, targetSettings))
        //                    continue;
        //
        //                // ignore any resource bundles
        //                if (cu instanceof ResourceBundleCompilationUnit)
        //                    continue;
        //
        //                // Create a DoABC tag per compilation unit.
        //
        //                // Please add this API to SWFTarget. Thx.
        //                // protected Boolean addToFrame(ICompilationUnit cu, SWFFrame mainFrame) throws InterruptedException
        //                // final boolean tagsAdded = cu.getSWFTagsRequest().get().addToFrame(mainFrame);
        //                final boolean tagsAdded = addToFrame(cu, mainFrame);
        //                if (!tagsAdded)
        //                {
        //                    ICompilerProblem problem = new UnableToBuildSWFTagProblem(cu.getAbsoluteFilename());
        //                    problems.add(problem);
        //                }
        //            }
        //
        //            createLinkReport(problems);

        return application;
    } catch (BuildCanceledException bce) {
        return null;
    } catch (InterruptedException ie) {
        return null;
    } finally {
        buildFinished();
    }
}

From source file:org.vclipse.constraint.scoping.ConstraintScopeProvider.java

private IScope createCsticScope(Iterable<Class> classes) {
    Class cls = Iterables.getFirst(classes, null);
    Iterable<Class> restClasses = Iterables.skip(classes, 1);
    if (cls.getSuperClasses().isEmpty() && Iterables.isEmpty(restClasses)) {
        return Scopes.scopeFor(cls.getCharacteristics());
    } else {/*from w w  w . j  a va 2s .  co m*/
        return Scopes.scopeFor(cls.getCharacteristics(),
                createCsticScope(Iterables.concat(cls.getSuperClasses(), restClasses)));
    }
}

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  w ww  .  j a  v a2  s  . 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.google.gerrit.server.config.SitePaths.java

@Inject
public SitePaths(@SitePath Path sitePath) throws IOException {
    site_path = sitePath;//from   w  w  w . java 2 s . c  om
    Path p = sitePath;

    bin_dir = p.resolve("bin");
    etc_dir = p.resolve("etc");
    lib_dir = p.resolve("lib");
    tmp_dir = p.resolve("tmp");
    plugins_dir = p.resolve("plugins");
    db_dir = p.resolve("db");
    data_dir = p.resolve("data");
    logs_dir = p.resolve("logs");
    mail_dir = etc_dir.resolve("mail");
    hooks_dir = p.resolve("hooks");
    static_dir = p.resolve("static");
    themes_dir = p.resolve("themes");
    index_dir = p.resolve("index");

    gerrit_sh = bin_dir.resolve("gerrit.sh");
    gerrit_war = bin_dir.resolve("gerrit.war");

    gerrit_config = etc_dir.resolve("gerrit.config");
    secure_config = etc_dir.resolve("secure.config");

    ssl_keystore = etc_dir.resolve("keystore");
    ssh_key = etc_dir.resolve("ssh_host_key");
    ssh_rsa = etc_dir.resolve("ssh_host_rsa_key");
    ssh_dsa = etc_dir.resolve("ssh_host_dsa_key");
    peer_keys = etc_dir.resolve("peer_keys");

    site_css = etc_dir.resolve(CSS_FILENAME);
    site_header = etc_dir.resolve(HEADER_FILENAME);
    site_footer = etc_dir.resolve(FOOTER_FILENAME);
    site_gitweb = etc_dir.resolve("gitweb_config.perl");

    boolean isNew;
    try (DirectoryStream<Path> files = Files.newDirectoryStream(site_path)) {
        isNew = Iterables.isEmpty(files);
    } catch (NoSuchFileException e) {
        isNew = true;
    }
    this.isNew = isNew;
}

From source file:org.dishevelled.bio.align.Alignments.java

/**
 * Return the maximum length in the specified ranges, or <code>-1</code> if ranges is empty.
 *
 * @param ranges ranges, must not be null, must not contain any null ranges, and all ranges must be [closed, open)
 * @return the maximum length in the specified ranges, or <code>-1</code> if ranges is empty
 *///from w  ww.j  a v a 2 s.  co  m
public static long maximumLength(final Iterable<Range<Long>> ranges) {
    checkNotNull(ranges);
    if (Iterables.isEmpty(ranges)) {
        return -1L;
    }
    return Ordering.natural().max(lengths(ranges));
}