Example usage for java.util Collections unmodifiableList

Introduction

In this page you can find the example usage for java.util Collections unmodifiableList.

Prototype

public static <T> List<T> unmodifiableList(List<? extends T> list)

Source Link

Document

Returns an unmodifiable view of the specified list.

Usage

From source file:Main.java

/**
 * As long as the predicate is happy, grind and append results to result list
 *
 * @param seed - initial input to predicate (and to grinder)
 * @param grinder - grinder(seed) gets appended to result
 * @param predicate - predicate(seed) tells whether to keep grinding
 * @return result list/* w  w w . j a v  a  2 s  . co  m*/
 */
public static <A> List<A> unfold(A seed, Function<A, A> grinder, Function<A, Boolean> predicate) {
    List<A> result = Collections.EMPTY_LIST;
    A counter = seed;
    while (predicate.apply(counter)) {
        result = append(counter, result);
        counter = grinder.apply(counter);
    }
    return Collections.unmodifiableList(result);
}

From source file:Main.java

public static <K, V> Map<K, List<V>> copyNullSafeMultiHashMapReified(Class<V> valueType,
        Map<? extends K, List<?>> map) {
    if (valueType == null)
        throw new NullPointerException("valueType");
    if (map == null)
        throw new NullPointerException("map");

    @SuppressWarnings("unchecked")
    Map<K, List<V>> result = (Map<K, List<V>>) (Map<?, ?>) copyNullSafeMutableHashMap(map);
    for (Map.Entry<K, List<V>> entry : result.entrySet()) {
        List<V> value = entry.getValue();
        ArrayList<V> valueCopy = new ArrayList<V>(value);
        for (V element : valueCopy) {
            valueType.cast(element);/*from  w w w. j  a v a2  s  .c  o m*/
        }

        entry.setValue(Collections.unmodifiableList(valueCopy));
    }
    return result;
}

From source file:Main.java

public static <T> List<T> readList(String root, String filename, Class<T> type) {
    List<T> objects = new ArrayList<>();
    File file = new File(root, filename);
    try {/* w ww  . j  av a  2  s  .c o  m*/
        if (file.exists()) {
            FileInputStream fis = new FileInputStream(file);
            ObjectInputStream ois = new ObjectInputStream(fis);
            Object object = ois.readObject();
            if (object instanceof List) {
                for (Object it : (List) object) {
                    objects.add(type.cast(it));
                }
            }
            ois.close();
            return Collections.unmodifiableList(objects);
        }
    } catch (Exception e) {
        Log.e(TAG, String.format("Failed to read [%s]", file), e);
    }
    return Collections.emptyList();
}

From source file:Main.java

public static <T> List<T> immutableList(T... elements) {
    return Collections.unmodifiableList(Arrays.asList(elements.clone()));
}

From source file:Main.java

public static <T> List<T> emptyOrUnmodifiable(final List<T> list) {
    return list == null ? Collections.<T>emptyList() : Collections.unmodifiableList(list);
}

From source file:Main.java

public static <A> List<A> tail(List list) {
    List result = new ArrayList<>(list);
    result.remove(0);//from www  .  j  a  v a 2 s  .  c o  m
    return Collections.unmodifiableList(result);
}

From source file:Main.java

/**
 * Returns the ciphers preferred to use during tests. They may be chosen because they are widely
 * available or because they are fast. There is no requirement that they provide confidentiality
 * or integrity./*w ww  . j  av  a  2s  . c o  m*/
 */
public static List<String> preferredCiphers() {
    String[] ciphers;
    try {
        ciphers = SSLContext.getDefault().getDefaultSSLParameters().getCipherSuites();
    } catch (NoSuchAlgorithmException ex) {
        throw new RuntimeException(ex);
    }
    List<String> ciphersMinusGcm = new ArrayList<String>();
    for (String cipher : ciphers) {
        // The GCM implementation in Java is _very_ slow (~1 MB/s)
        if (cipher.contains("_GCM_")) {
            continue;
        }
        ciphersMinusGcm.add(cipher);
    }
    return Collections.unmodifiableList(ciphersMinusGcm);
}

From source file:Main.java

public static final <T> List<T> collect(Iterator<? extends T> it, Comparator<? super T> cmp) {
    ArrayList<T> r = new ArrayList<T>();
    while (it.hasNext()) {
        T i = it.next();/*from w w w  .j a v a 2  s.  com*/
        int position = Collections.binarySearch(r, i, cmp);
        if (position < 0)
            position = -(position + 1);
        r.add(position, i);
    }
    return Collections.unmodifiableList(r);
}

From source file:Main.java

public static <T> List<T> append(List<T> list, T t) {
    List<T> ts = copy(list);
    ts.add(t);/*w  w w .ja v  a 2  s  .  c om*/
    return Collections.unmodifiableList(ts);
}

From source file:Main.java

/** Returns an immutable list containing {@code elements}. */
public static <T> List<T> immutableList(T... elements) {
    return Collections.unmodifiableList(Arrays.asList(elements.clone()));
}