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

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:de.monticore.cli.MontiCoreCLI.java

/**
 * Main method./*from ww  w  .ja  v  a 2  s . com*/
 * 
 * @param args the CLI arguments
 */
public static void main(String[] args) {
    if (args.length == 0) {
        // the only required input are the grammar file(s)/directories
        System.out.println("MontiCore CLI Usage: java -jar monticore-cli.jar <grammar files> <options>");
        return;
    }
    // check if the input model(s) are specified without option and add it for
    // further processing
    if (!args[0].startsWith("-")) {
        ArrayList<String> fixedArgs = new ArrayList<String>(Arrays.asList(args));
        fixedArgs.add(0, "-" + MontiCoreConfiguration.Options.GRAMMARS_SHORT.toString());
        args = fixedArgs.toArray(new String[fixedArgs.size()]);
    }

    CLIArguments arguments = CLIArguments.forArguments(args);
    MontiCoreCLIConfiguration configuration = MontiCoreCLIConfiguration.fromArguments(arguments);

    // this will be CLI's default model path if none is specified
    Iterable<String> mp = Arrays.asList("monticore-cli.jar");
    Iterable<String> mpArg = arguments.asMap().get(MontiCoreConfiguration.Options.MODELPATH.toString());
    Iterable<String> mpShortArg = arguments.asMap()
            .get(MontiCoreConfiguration.Options.MODELPATH_SHORT.toString());
    if ((mpArg == null || Iterables.isEmpty(mpArg)) && (mpShortArg == null || Iterables.isEmpty(mpShortArg))) {
        // prepare args which contain the fixed model path
        Map<String, Iterable<String>> wrappedArgs = new HashMap<>();
        wrappedArgs.put(MontiCoreConfiguration.Options.MODELPATH.toString(), mp);
        wrappedArgs.putAll(arguments.asMap());
        // use this fixed configuration
        configuration = MontiCoreCLIConfiguration.fromMap(wrappedArgs);
    }

    // we store the requested output directory as a system variable such that we
    // can inject it into the logback configuration
    System.setProperty(MC_OUT, configuration.getInternal().getOut().getAbsolutePath());

    // this should always happen first in order to use any custom configurations
    if (System.getProperty(LOGBACK_CONFIGURATIONFILE) == null) {
        initLogging(configuration);
    }

    // this needs to be called after the statement above; otherwise logback will
    // ignore custom configurations supplied via system property
    Slf4jLog.init();

    if (System.getProperty(LOGBACK_CONFIGURATIONFILE) != null) {
        Log.debug(
                "Using system property logback configuration " + System.getProperty(LOGBACK_CONFIGURATIONFILE),
                MontiCoreCLI.class.getName());
    }

    // before we launch MontiCore we check if there are any ".mc4" files in the
    // input argument (source path)
    Iterator<Path> inputPaths = configuration.getInternal().getGrammars().getResolvedPaths();
    if (!inputPaths.hasNext()) {
        System.clearProperty(MC_OUT);
        Log.error("0xA1000 There are no \".mc4\" files to parse. Please check the \"grammars\" option.");
        return;
    }

    try {
        // since this is the default we load the default script
        ClassLoader l = MontiCoreScript.class.getClassLoader();
        String script = Resources
                .asCharSource(l.getResource("de/monticore/monticore_emf.groovy"), Charset.forName("UTF-8"))
                .read();

        // BUT if the user specifies another script to use, we check if it is
        // there and load its content
        if (configuration.getScript().isPresent()) {
            if (!configuration.getScript().get().exists()) {
                System.clearProperty(MC_OUT);
                Log.error("0xA1001 Custom script \"" + configuration.getScript().get().getPath()
                        + "\" not found!");
                return;
            }
            script = Files.toString(configuration.getScript().get(), Charset.forName("UTF-8"));
        }

        // execute the scripts (either default or custom)
        new MontiCoreScript().run(script, configuration.getInternal());
    } catch (IOException e) {
        System.clearProperty(MC_OUT);
        Log.error("0xA1002 Failed to load Groovy script.", e);
    }
}

From source file:com.github.ferstl.maven.pomenforcers.model.CollectionToStringHelper.java

public static String toString(String prefix, Iterable<?> iterable) {
    StringBuilder sb = new StringBuilder(prefix).append(" [\n");
    JOINER.appendTo(sb, iterable).append((iterable != null && !Iterables.isEmpty(iterable)) ? "\n]" : "]");
    return sb.toString();
}

From source file:nz.co.testamation.common.util.ObjectUtil.java

public static boolean allNotEmpty(Object... objects) {
    for (Object object : objects) {
        if (object == null) {
            return false;
        }// w w w.  j  av  a2 s  . c om
        if (object instanceof CharSequence && StringUtils.isBlank((CharSequence) object)) {
            return false;
        }

        if (object instanceof Iterable && Iterables.isEmpty((Iterable<?>) object)) {
            return false;
        }
    }
    return true;
}

From source file:net.roddrim.number5.tools.collect.N5Collections.java

public static <T> boolean isNullOrEmpty(@NonNull final Iterable<T> i) {
    return i == null || Iterables.isEmpty(i);
}

From source file:org.apache.beam.sdk.io.gcp.spanner.MutationUtils.java

/**
 * Check if the mutation is a delete by a single primary key operation.
 *
 * @param m mutation/*from  w w  w. ja  v a  2 s . c  o m*/
 * @return true if mutation is a point delete
 */
public static boolean isPointDelete(Mutation m) {
    return m.getOperation() == Mutation.Op.DELETE && Iterables.isEmpty(m.getKeySet().getRanges())
            && Iterables.size(m.getKeySet().getKeys()) == 1;
}

From source file:com.googlecode.blaisemath.util.Rectangles.java

/**
 * Return rectangle that is bounding box of all provided.
 * @param rects rectangles/*from   ww  w  . ja v a  2s.com*/
 * @return smallest box enclosing provided rectangles, null if argument is empty
 */
@Nullable
public static Rectangle2D boundingBox(Iterable<? extends Rectangle2D> rects) {
    if (Iterables.isEmpty(rects)) {
        return null;
    }
    Rectangle2D res = null;
    for (Rectangle2D r : rects) {
        if (res == null) {
            res = r;
        } else {
            res = res.createUnion(r);
        }
    }
    return res;
}

From source file:org.richfaces.cdk.util.MorePredicates.java

public static <S, D> Predicate<D> any(Iterable<S> options, Function<S, Predicate<D>> function) {
    if (options == null || Iterables.isEmpty(options)) {
        return Predicates.alwaysTrue();
    }//from   www. j  a  v a  2 s. com

    return Predicates.or(Iterables.transform(options, function));
}

From source file:com.google.api.server.spi.config.validation.InconsistentApiConfigurationException.java

private static String getErrorMessage(ApiConfig config, ApiConfig otherConfig,
        Iterable<ApiConfigInconsistency<Object>> inconsistencies) {
    Preconditions.checkArgument(!Iterables.isEmpty(inconsistencies));
    ApiConfigInconsistency<?> firstInconsistency = Iterables.getFirst(inconsistencies, null);
    return String.format(
            "API-wide configuration does not match between the classes %s and %s. All "
                    + "API classes with the same API name and version must have the exact same API-wide "
                    + "configuration. Differing property: %s (%s vs %s).",
            config.getApiClassConfig().getApiClassJavaName(),
            otherConfig.getApiClassConfig().getApiClassJavaName(), firstInconsistency.getPropertyName(),
            firstInconsistency.getValue1(), firstInconsistency.getValue2());
}

From source file:com.vilt.minium.impl.WaitPredicates.java

/**
 * Predicate to use with {@link WaitWebElements#wait(Predicate)} methods which ensures that
 * evaluation will only be successful when this instance is empty (that is, evaluates
 * to zero {@link org.openqa.selenium.WebElement} instances).
 *
 * @param <T> the generic type/*w w w  . j  a  v a2  s  .c  o m*/
 * @return predicate that returns true if it is empty
 */
public static <T extends WebElements> Predicate<T> whileNotEmpty() {
    return new Predicate<T>() {
        @Override
        public boolean apply(T input) {
            return Iterables.isEmpty(input);
        }

        @Override
        public String toString() {
            return "whileNotEmpty()";
        }
    };
}

From source file:org.trancecode.xproc.step.PipelineStepProcessor.java

private static Step addImplicitInputPort(final Step pipeline) {
    if (Iterables.isEmpty(pipeline.getInputPorts())) {
        return pipeline
                .declarePort(Port.newInputPort(pipeline.getName(), XProcPorts.SOURCE, pipeline.getLocation()));
    }//from  w w w  . j  a  v a2 s .  c o  m

    return pipeline;
}