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

Introduction

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

Prototype

public static <T> Iterable<T> cycle(T... elements)

Source Link

Document

Returns an iterable whose iterators cycle indefinitely over the provided elements.

Usage

From source file:com.facebook.buck.thrift.ThriftCompilerStep.java

@Override
protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
    return ImmutableList.<String>builder().addAll(compilerPrefix)
            .add("--gen", String.format("%s:%s", language, Joiner.on(',').join(options)))
            .addAll(MoreIterables.zipAndConcat(Iterables.cycle("-I"),
                    Iterables.transform(includes, Object::toString)))
            .add("-o", outputDir.toString()).add(input.toString()).build();
}

From source file:org.calrissian.mango.collect.CloseableIterables.java

/**
 * Returns a closeable iterable whose iterators cycle indefinitely over the elements of
 * {@code iterable}.//  w ww  . j av a 2s .c o m
 *
 * <p>That iterator supports {@code remove()} if {@code iterable.iterator()}
 * does. After {@code remove()} is called, subsequent cycles omit the removed
 * element, which is no longer in {@code iterable}. The iterator's
 * {@code hasNext()} method returns {@code true} until {@code iterable} is
 * empty.
 *
 * <p><b>Warning:</b> Typical uses of the resulting iterator may produce an
 * infinite loop. You should use an explicit {@code break} or be certain that
 * you will eventually remove all the elements.  The close method should be expicitly
 * called when done with iteration.  Tools such as {@code CloseableIterables.autoClose()}
 * will not work.
 */
public static <T> CloseableIterable<T> cycle(final CloseableIterable<T> iterable) {
    return wrap(Iterables.cycle(iterable), iterable);
}

From source file:com.google.devtools.build.lib.query2.RBuildFilesFunction.java

@Override
public Iterable<ArgumentType> getArgumentTypes() {
    return Iterables.cycle(ArgumentType.WORD);
}

From source file:de.johni0702.sponge.noteblockapi.impl.NBSongPlayers.java

@Override
public SongPlayer createLoopingSongPlayer(final Song... song) {
    return createSongPlayer(new SongProvider() {
        private Iterator<Song> iter = Iterables.cycle(song).iterator();

        @Override/*from w w w.  j  a va2  s.  c  o m*/
        public Song getNextSong(SongPlayer songPlayer) {
            return iter.next();
        }
    });
}

From source file:com.facebook.presto.plugin.blackhole.BlackHolePageSourceProvider.java

@Override
public ConnectorPageSource createPageSource(ConnectorSession session, ConnectorSplit split,
        List<ColumnHandle> columns) {
    BlackHoleSplit blackHoleSplit = checkType(split, BlackHoleSplit.class, "BlackHoleSplit");

    ImmutableList.Builder<Type> builder = ImmutableList.builder();

    for (ColumnHandle column : columns) {
        builder.add((checkType(column, BlackHoleColumnHandle.class, "BlackHoleColumnHandle")).getColumnType());
    }// w  w w  .j a va  2  s  .c  om
    List<Type> types = builder.build();

    return new FixedPageSource(Iterables.limit(
            Iterables.cycle(
                    generateZeroPage(types, blackHoleSplit.getRowsPerPage(), blackHoleSplit.getFieldsLength())),
            blackHoleSplit.getPagesCount()));
}

From source file:org.opendaylight.fpc.utils.AbstractThreadPool.java

/**
 * Starts the individual threads of the pool.  They SHOULD not process
 * until the count down signal is called via run.
 *
 * @see #run()/*from w w w  .jav  a 2  s  .c  om*/
 * @throws Exception - thrown when an error occurs during start up.
 */
protected void startUp() throws Exception {
    this.poolFactory = getPoolFactory(db);
    for (int x = 0; x < poolSize; ++x) {
        T worker = poolFactory.get();
        pool.add(worker);
        worker.open();
        Thread thread = new Thread(worker);
        threadPool.add(thread);
        thread.start();
    }
    this.it = Iterables.cycle(pool).iterator();
}

From source file:com.facebook.buck.cxx.CxxPreprocessStep.java

@VisibleForTesting
protected ImmutableList<String> getCommand() {
    return ImmutableList.<String>builder().add(preprocessor.toString()).add("-E").addAll(flags)
            .addAll(MoreIterables.zipAndConcat(Iterables.cycle("-I"),
                    Iterables.transform(includes, Functions.toStringFunction())))
            .addAll(MoreIterables.zipAndConcat(Iterables.cycle("-isystem"),
                    Iterables.transform(systemIncludes, Functions.toStringFunction())))
            .add(input.toString()).build();
}

From source file:com.facebook.buck.features.ocaml.OcamlDebugLauncherStep.java

private String getDebugCmd() {
    ImmutableList.Builder<String> debugCmd = ImmutableList.builder();
    debugCmd.add("rlwrap");
    debugCmd.addAll(args.ocamlDebug.getCommandPrefix(resolver));

    ImmutableList<String> includesBytecodeFlags = ImmutableList.copyOf(MoreIterables.zipAndConcat(
            Iterables.cycle(OcamlCompilables.OCAML_INCLUDE_FLAG), args.transitiveBytecodeIncludes));

    debugCmd.addAll(includesBytecodeFlags);
    debugCmd.addAll(args.bytecodeIncludeFlags);

    debugCmd.add(args.bytecodeOutput.toString());
    return Shell.shellQuoteJoin(debugCmd.build(), " ") + " $@";
}

From source file:com.facebook.buck.cxx.AbstractCxxIncludePaths.java

/**
 * Build a list of compiler flag strings representing the contained paths.
 *
 * This method's parameters allow the caller to do some massaging and cleaning-up of paths.
 * @param pathResolver/*from   ww  w  .  j a v a 2  s .com*/
 * @param pathShortener used to shorten the {@code -I} and {@code -isystem} paths
 * @param frameworkPathTransformer used to shorten/convert/transmogrify framework {@code -F} paths
 */
public ImmutableList<String> getFlags(SourcePathResolver pathResolver, PathShortener pathShortener,
        Function<FrameworkPath, Path> frameworkPathTransformer, Preprocessor preprocessor) {
    ImmutableList.Builder<String> builder = ImmutableList.builder();

    builder.addAll(CxxHeaders.getArgs(getIPaths(), pathResolver, Optional.of(pathShortener), preprocessor));

    builder.addAll(MoreIterables.zipAndConcat(Iterables.cycle("-F"), FluentIterable.from(getFPaths())
            .transform(frameworkPathTransformer).transform(Object::toString).toSortedSet(Ordering.natural())));

    return builder.build();
}

From source file:com.facebook.buck.ocaml.OcamlDebugLauncherStep.java

private String getDebugCmd() {
    ImmutableList.Builder<String> debugCmd = ImmutableList.builder();
    debugCmd.add("rlwrap");
    debugCmd.addAll(args.ocamlDebug.getCommandPrefix(resolver));

    Iterable<String> includesBytecodeDirs = FluentIterable.from(args.ocamlInput)
            .transformAndConcat(new Function<OcamlLibrary, Iterable<String>>() {
                @Override/*  w w  w . ja v a  2  s  .  c  o m*/
                public Iterable<String> apply(OcamlLibrary input) {
                    return input.getBytecodeIncludeDirs();
                }
            });

    ImmutableList<String> includesBytecodeFlags = ImmutableList.copyOf(MoreIterables
            .zipAndConcat(Iterables.cycle(OcamlCompilables.OCAML_INCLUDE_FLAG), includesBytecodeDirs));

    debugCmd.addAll(includesBytecodeFlags);
    debugCmd.addAll(args.bytecodeIncludeFlags);

    debugCmd.add(args.bytecodeOutput.toString());
    return Shell.shellQuoteJoin(debugCmd.build(), " ") + " $@";
}