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:Main.java

@SuppressWarnings({ "rawtypes" })
private static Object toFloatArray(Collection collection) {
    float[] fa = new float[collection.size()];

    int i = 0;//from   w  w w .jav a  2 s.  c o m
    for (Object o : collection) {
        float f = ((Float) o).floatValue();
        fa[i++] = f;
    }

    return fa;
}

From source file:Main.java

/**
 * Returns a copy of the given list that is safe to iterate over and perform actions that may
 * modify the original list./*  w  ww.java 2s  . c  o m*/
 *
 * <p> See #303 and #375. </p>
 */
public static <T> List<T> getSnapshot(Collection<T> other) {
    // toArray creates a new ArrayList internally and this way we can guarantee entries will not
    // be null. See #322.
    List<T> result = new ArrayList<T>(other.size());
    for (T item : other) {
        result.add(item);
    }
    return result;
}

From source file:org.socialhistoryservices.pid.util.NamingAuthority.java

public static List<String> getNaRole(Authentication userAuthentication) {

    final Collection<? extends GrantedAuthority> authorities = userAuthentication.getAuthorities();
    final List<String> nas = new ArrayList(authorities.size());
    for (GrantedAuthority authority : authorities) {
        String role = authority.getAuthority().replace("\n", ""); // ToDo: find out if there still is a \n in the role.
        if (role.startsWith(role_prefix)) {
            nas.add(role.substring(role_prefix.length()));
        } else if (role.startsWith(role_prefix_deprecated)) {
            nas.add(role.substring(role_prefix_deprecated.length()));
        }/*w w w .  j av  a  2  s  . c  o m*/
    }
    if (nas.size() == 0)
        throw new SecurityException("User " + userAuthentication.getName()
                + " has not got the required roles to use this service.");
    return nas;
}

From source file:com.cdancy.artifactory.rest.util.ArtifactoryUtils.java

public static String collectionToString(Collection<String> collection, String separator) {
    if (collection == null || collection.size() == 0)
        return null;
    Joiner joiner = Joiner.on(separator != null ? separator : ",").skipNulls();
    return joiner.join(collection);
}

From source file:Main.java

/**
 * Returns a String representation of this collection.
 * The items are converted to strings using String.format(frmtPattern).
 * If frmtPattern is given, the items will be formatted as
 * String.format(Object, frmtPattern), else it will use String.valueOf(Object).
 * If separatedby is given, the items will be separated by that string.
 *
 * @param c//w  ww .j av a2 s.  c om
 * @param separatedBy
 * @return
 */
public static String toString(Collection c, String separatedBy/*, String frmtPattern*/) {

    if (c == null || c.size() == 0)
        return "";

    //        boolean usePattern = frmtPattern != null;
    StringBuffer sb = new StringBuffer();
    for (Iterator itr = c.iterator(); itr.hasNext();) {
        Object o = itr.next();
        //            String s = usePattern ? String.format(frmtPattern, o) : String.valueOf(o);
        String s = String.valueOf(o);
        sb.append(s);
        if (separatedBy != null && itr.hasNext()) {
            sb.append(separatedBy);
        }
    }

    return sb.toString();
}

From source file:net.firejack.platform.core.utils.ArrayUtils.java

public static <T> T[] getArray(Collection<T> itemList, Class<T> clazz) {
    return itemList == null || itemList.isEmpty() ? null
            : itemList.toArray((T[]) Array.newInstance(clazz, itemList.size()));
}

From source file:Main.java

public static <T> List<T>[] split(Collection<T> set, int n) {
    if (set.size() >= n) {
        @SuppressWarnings("unchecked")
        List<T>[] arrays = new List[n];
        int minSegmentSize = (int) Math.floor(set.size() / (double) n);

        int start = 0;
        int stop = minSegmentSize;

        Iterator<T> it = set.iterator();

        for (int i = 0; i < n - 1; i++) {
            int segmentSize = stop - start;
            List<T> segment = new ArrayList<>(segmentSize);
            for (int k = 0; k < segmentSize; k++) {
                segment.add(it.next());/*from  w w  w.  j a  v a 2  s.  com*/
            }
            arrays[i] = segment;
            start = stop;
            stop += segmentSize;
        }

        int segmentSize = set.size() - start;
        List<T> segment = new ArrayList<>(segmentSize);
        for (int k = 0; k < segmentSize; k++) {
            segment.add(it.next());
        }
        arrays[n - 1] = segment;

        return arrays;
    } else {
        throw new IllegalArgumentException("n must not be smaller set size!");
    }
}

From source file:Main.java

@SuppressWarnings({ "rawtypes" })
private static Object toBooleanArray(Collection collection) {
    boolean[] ba = new boolean[collection.size()];

    int i = 0;/*from w  w w  . j a va 2 s. co  m*/
    for (Object o : collection) {
        boolean b = ((Boolean) o).booleanValue();
        ba[i++] = b;
    }

    return ba;
}

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

/**
 * Converts the given function names to {@link FxSQLFunction} objects. If an entry does not
 * represent a known FxSQL function, a FxRuntimeException is thrown.
 *
 * @param values    the function names to be converted
 * @return          the {@link FxSQLFunction} objects
 *///from w w  w  .ja  v a2s  .co m
public static List<FxSQLFunction> asFunctions(Collection<String> values) {
    final List<FxSQLFunction> result = new ArrayList<FxSQLFunction>(values.size());
    for (String value : values) {
        if (!FUNCTIONS.containsKey(value.toLowerCase())) {
            throw new FxNotFoundException("ex.sqlSearch.function.notFound", value,
                    StringUtils.join(getSqlNames(FUNCTIONS.values()), ", ")).asRuntimeException();
        }
        result.add(FUNCTIONS.get(value.toLowerCase()));
    }
    return result;
}

From source file:Main.java

@SuppressWarnings({ "rawtypes" })
private static Object toDoubleArray(Collection collection) {
    double[] da = new double[collection.size()];

    int i = 0;/*  ww  w.j  a  va2  s  . c o  m*/
    for (Object o : collection) {
        double d;
        if (o instanceof Integer) {
            d = (Integer) o;
        } else {
            d = ((Double) o).doubleValue();
        }
        da[i++] = d;
    }

    return da;
}