Example usage for java.util Collection size

Introduction

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

Prototype

int size();

Source Link

Document

Returns the number of elements in this collection.

Usage

From source file:com.flexive.shared.search.FxSQLFunctions.java

/**
 * Return the FxSQL function names for the given list of {@link com.flexive.shared.search.FxSQLFunction}
 * objects, i.e. project the result of {@link FxSQLFunction#getSqlName()}.
 *
 * @param functions the FxSQL function object
 * @return  the FxSQL function names as used in FxSQL
 *///from  w w w. j  av a2  s.com
public static List<String> getSqlNames(Collection<? extends FxSQLFunction> functions) {
    final List<String> result = new ArrayList<String>(functions.size());
    for (FxSQLFunction function : functions) {
        result.add(function.getSqlName());
    }
    return result;
}

From source file:com.bigdata.dastor.streaming.StreamOut.java

/**
 * Split out files for all tables on disk locally for each range and then stream them to the target endpoint.
*//*from  w  w w. j  a v a  2 s.co  m*/
public static void transferRanges(InetAddress target, String tableName, Collection<Range> ranges,
        Runnable callback) {
    assert ranges.size() > 0;

    logger.debug("Beginning transfer process to " + target + " for ranges " + StringUtils.join(ranges, ", "));

    /*
     * (1) dump all the memtables to disk.
     * (2) anticompaction -- split out the keys in the range specified
     * (3) transfer the data.
    */
    try {
        Table table = Table.open(tableName);
        logger.info("Flushing memtables for " + tableName + "...");
        for (Future f : table.flush()) {
            try {
                f.get();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            } catch (ExecutionException e) {
                throw new RuntimeException(e);
            }
        }
        logger.info("Performing anticompaction ...");
        /* Get the list of files that need to be streamed */
        transferSSTables(target, table.forceAntiCompaction(ranges, target), tableName); // SSTR GC deletes the file when done
    } catch (IOException e) {
        throw new IOError(e);
    } finally {
        StreamOutManager.remove(target);
    }
    if (callback != null)
        callback.run();
}

From source file:Main.java

public static boolean equalsSet(Collection c1, Collection c2) {
    boolean equals;
    if (c1 == null) {
        equals = (c2 == null);/*from  w  ww  .jav a  2  s  .  com*/
    } else if (c2 == null) {
        equals = false;
    } else if (c1.size() == c2.size()) {
        equals = true;
        Iterator iterC1 = c1.iterator();
        while (equals && iterC1.hasNext()) {
            Object o1 = iterC1.next();
            equals = c2.contains(o1);
        }
    } else {
        equals = false;
    }
    return equals;
}

From source file:Main.java

/**
 * Returns a three-element array of mutable {@code List}s:
 * <ol>/*ww w.ja  v a2 s .  c o m*/
 *    </li>
 *      the intersection of {@code a} and {@code b}
 *    <li>
 *    </li>
 *      the {@code a} - {@code b} difference
 *    <li>
 *    </li>
 *      the {@code b} - {@code a} difference
 *    <li>
 * </ol>
 *
 * @param       comparator
 *          a comparator to sort results, or {@code null} to remain
 *          unsorted
 */
public static <T> List<T>[] getIntersectAndDiffs(Collection<? extends T> a, Collection<? extends T> b,
        Comparator<T> comparator) {

    int aSize = a.size();
    List<T> aDiff = new ArrayList<T>(aSize);
    aDiff.addAll(a);

    int bSize = b.size();
    List<T> bDiff = new ArrayList<T>(bSize);
    bDiff.addAll(b);

    if (comparator != null) {
        Collections.sort(aDiff, comparator);
        Collections.sort(bDiff, comparator);
    }

    List<T> abInter = new ArrayList<T>(Math.min(aSize, bSize));

    for (int i = aDiff.size() - 1; i >= 0; i--) {
        T element = aDiff.get(i);

        int index = comparator == null ? bDiff.indexOf(element)
                : Collections.binarySearch(bDiff, element, comparator);

        if (index != -1) {
            bDiff.remove(index);
            aDiff.remove(i);
            abInter.add(element);
        }
    }

    @SuppressWarnings({ "unchecked" })
    List<T>[] array = (List<T>[]) new List[] { abInter, aDiff, bDiff };

    return array;
}

From source file:de.chludwig.websec.saml2sp.springconfig.CurrentUserHandlerMethodArgumentResolver.java

private static Set<RoleId> getUserRoles(Authentication auth) {
    Collection<? extends GrantedAuthority> authorities = auth.getAuthorities();
    Set<RoleId> roles = new HashSet<>(authorities.size());
    for (GrantedAuthority authority : authorities) {
        RoleId roleId = RoleId.valueById(authority.getAuthority());
        if (roleId != null) {
            roles.add(roleId);/*from w  ww. ja  v a 2  s .com*/
        }
    }
    return roles;
}

From source file:br.ufpe.cin.srmqnlp.CarrotConsoleFormatter.java

public static void displayDocuments(final Collection<Document> documents) {
    System.out.println("Collected " + documents.size() + " documents\n");
    for (final Document document : documents) {
        displayDocument(0, document);//from   w w w.jav  a2s .c  o m
    }
}

From source file:Main.java

public static <V> V getRandom(Collection<V> collection) {

    if (collection.isEmpty()) {
        return null;
    }/*from w ww.ja  v  a2s .  c  o  m*/

    int randIdx = (int) Math.round(Math.random() * (collection.size() - 1));
    int count = 0;
    Iterator<V> iterator = collection.iterator();
    while (iterator.hasNext()) {
        V current = iterator.next();
        if (count == randIdx) {
            return current;
        }
        count++;
    }

    throw new RuntimeException("Shouldn't happen");
}

From source file:example.springdata.mongodb.util.ConsoleResultPrinter.java

public static void printResult(Collection<BlogPost> blogPosts, CriteriaDefinition criteria) {

    System.out.println(String.format("XXXXXXXXXXXX -- Found %s blogPosts matching '%s' --XXXXXXXXXXXX",
            blogPosts.size(), criteria != null ? criteria.getCriteriaObject() : ""));

    for (BlogPost blogPost : blogPosts) {
        System.out.println(blogPost);
    }/*  w  ww.j  ava2 s. c o m*/

    System.out.println("XXXXXXXXXXXX -- XXXXXXXXXXXX -- XXXXXXXXXXXX\r\n");
}

From source file:Main.java

/**
 * Return the last element of a collection. This method iterates over the complete collection to found
 * the last element.//  ww  w  . j a v  a 2s.  c o  m
 *
 * @param collection The collection to get the last element from.
 * @param <T> The type of value.
 * @return The last element of the collection. If there is no element, the method return null.
 */
public static <T> T last(Collection<T> collection) {
    if (collection.isEmpty()) {
        return null;
    }

    Iterator<T> iterator = collection.iterator();

    for (int i = 0; i < collection.size() - 1; i++) {
        iterator.next();
    }

    return iterator.next();
}

From source file:Main.java

/**
 * Return the first N items in a collection.
 *
 *//*from   w w  w  .  j a  v a2 s  .  c o m*/
public static <T> List<T> head(Collection<T> input, int count) {

    List<T> result = Lists.newArrayList();

    ArrayList<T> tmp = Lists.newArrayList();
    tmp.addAll(input);

    for (int i = 0; i < input.size(); i++) {

        if (result.size() == count)
            break;

        result.add(tmp.get(i));

    }

    return result;

}