Example usage for java.util Collection isEmpty

Introduction

In this page you can find the example usage for java.util Collection isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:org.cloudfoundry.maven.common.CommonUtils.java

/**
 * Formats the supported frameworks as a command separated list.
 *
 * @param offerings List of services/*from www  .  j a  v  a 2 s .  c o m*/
 * @return a String but never null
 */
public static String serviceOfferingsToCommaDelimitedString(final Collection<CloudServiceOffering> offerings) {

    if (offerings == null || offerings.isEmpty()) {
        return "";
    }

    StringBuilder sb = new StringBuilder();
    final Iterator<CloudServiceOffering> it = offerings.iterator();

    while (it.hasNext()) {
        CloudServiceOffering offering = it.next();
        sb.append(offering.getLabel());

        if (it.hasNext()) {
            sb.append(", ");
        }
    }
    return sb.toString();
}

From source file:com.jlfex.hermes.common.utils.CollectionUtil.java

/**
 * ?.//from   w ww . jav a  2 s  .c  o m
 */
@SuppressWarnings("rawtypes")
public static boolean isEmpty(Collection collection) {
    return (collection == null) || collection.isEmpty();
}

From source file:net.landora.video.utils.UIUtils.java

public static <T> T select(Collection<T> collection) {
    if (collection == null || collection.isEmpty()) {
        return null;
    } else {//from   w w w. java2s  . co  m
        return collection.iterator().next();
    }
}

From source file:com.github.rwitzel.streamflyer.internal.thirdparty.ZzzValidate.java

/**
 * Validates that the given collection is not empty.
 * /*from  www .j ava2 s  .c  o m*/
 * @param collection
 * @param collectionName
 */
public static void isNotEmpty(Collection<?> collection, String collectionName) {
    notNull(collection, collectionName + " must not be null");
    isTrue(!collection.isEmpty(), collectionName + " must not be empty");
}

From source file:com.jlfex.hermes.common.utils.CollectionUtil.java

/**
 * ?./*from  ww  w.  ja  va2s .  c  o  m*/
 */
@SuppressWarnings("rawtypes")
public static boolean isNotEmpty(Collection collection) {
    return (collection != null) && !(collection.isEmpty());
}

From source file:coolmap.application.plugin.PluginMaster.java

public static void initialize() {
    String pluginPath;//from  w  w w .ja v a 2s . c  o m
    if (Config.isInitialized()) {
        pluginPath = Config.getProperty(Config.PLUGIN_DIRECTORY);
    } else {
        pluginPath = "plugin";
    }

    File pluginFolder = new File(pluginPath);

    //        System.out.println(pluginFolder.getAbsolutePath());
    pluginManager = PluginManagerFactory.createPluginManager();
    pluginManager.addPluginsFrom(pluginFolder.toURI());

    //        after loading everything
    pluginManagerUtil = new PluginManagerUtil(pluginManager);
    Collection<CoolMapPlugin> plugins = pluginManagerUtil.getPlugins(CoolMapPlugin.class);

    Collection<PluginInformation> pluginInfo = pluginManagerUtil.getPlugins(PluginInformation.class);

    PluginInformationImpl piImpl = null;
    if (!pluginInfo.isEmpty()) {
        piImpl = (PluginInformationImpl) pluginInfo.iterator().next();
    }

    for (CoolMapPlugin plugin : plugins) {
        try {

            CMConsole.logInfo("Loaded " + plugin.getName() + " plugin");
            //                System.out.println(plugin.getName());
            JSONObject config = new JSONObject();
            if (piImpl != null) {
                //gets the string
                try {
                    Collection<String> paths = piImpl
                            .getInformation(PluginInformation.Information.CLASSPATH_ORIGIN, plugin);
                    if (!paths.isEmpty()) {
                        config.put(CoolMapPluginTerms.ATTR_URI, paths.iterator().next());
                    }
                } catch (Exception e) {
                    //do nothing, not found
                }
            }

            plugin.initialize(config);

        } catch (Exception e) {
            CMConsole.logWarning("Loaded '" + plugin.getName() + "' plugin");
            CMConsole.logToFile(e);
        }
    }
}

From source file:com.fuxian.yuncai.common.util.CollectionUtils.java

/**
 * ?./*from   www.j a v a2s  .co  m*/
 */
@SuppressWarnings("rawtypes")
public static boolean isEmpty(Collection collection) {
    return ((collection == null) || collection.isEmpty());
}

From source file:eu.eubrazilcc.lvl.storage.security.PermissionHelper.java

public static final String asOAuthString(final Collection<String> collection, final boolean sort) {
    checkArgument(collection != null && !collection.isEmpty(), "Uninitialized or invalid scope collection");
    final Iterable<String> filtered = filter(transform(collection, new Function<String, String>() {
        @Override/*from   ww  w. j  av  a 2  s.  co m*/
        public String apply(final String permission) {
            return trimToNull(permission);
        }
    }), notNull());
    return on(PERMISSIONS_SEPARATOR).skipNulls()
            .join(sort ? natural().nullsFirst().immutableSortedCopy(filtered) : filtered);
}

From source file:com.github.sakserv.lslock.cli.LockListerCli.java

/**
 * Prints the final output for the locks
 *
 * @param lockDirectory     Directory to recurse for lock files
 * @throws IOException      If the lockdirectory is missing
 *//*  w  w w .j av  a 2s  .  c om*/
public static void printLocks(File lockDirectory, HashMap<Integer, Integer> procLocksContents)
        throws IOException {

    Collection<File> fileList = FileUtils.listFiles(lockDirectory, null, true);

    // If not locks are found, output no locks found
    if (procLocksContents.isEmpty() || fileList.isEmpty()) {
        System.out.println("No locks found for " + lockDirectory);
    } else {
        // Setup the header
        System.out.printf("%-15s %-5s %n", "PID", "PATH");

        // Iterative the files and print the PID and PATH for the lock
        for (File file : fileList) {
            System.out.printf("%-15s %15s %n", procLocksContents.get(getInode(file)), file);
        }
    }
    System.out.println();
}

From source file:com.fuxian.yuncai.common.util.CollectionUtils.java

/**
 * ?.//from   www  . ja v  a  2  s . co  m
 */
@SuppressWarnings("rawtypes")
public static boolean isNotEmpty(Collection collection) {
    return ((collection != null) && !(collection.isEmpty()));
}