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

/**
 * Like Collections.unmodifiableList(), but with checks for null values.
 *//*from  w  w  w .  ja v  a  2  s .co  m*/
public static <T> List<T> unmodifiableList(List<T> list) {

    if (list == null) {
        return Collections.emptyList();
    }

    return Collections.unmodifiableList(list);
}

From source file:Main.java

public static <T> List<T> asConstList(Collection<T> in) {
    ArrayList<T> ret = new ArrayList(in);
    ret.trimToSize();/*w w w  . j a va 2s  .  c  o m*/
    return Collections.unmodifiableList(ret);
}

From source file:Main.java

/**
 * Converts the specified Array to an unmodifiable List containing the same elements.
 *
 * @param source Array of Objects to be converted to an unmodifiable List.
 * @return List of Objects containing the elements of the specified Array.
 *///from ww  w . jav a 2s .  co m
public static <E> List<E> unmodifiableList(E... source) {
    return Collections.unmodifiableList(Arrays.asList(source));
}

From source file:Main.java

public static <T> List<T> unmodifiableArrayList(Collection<? extends T> elements, Class<T> castClass) {
    return Collections.unmodifiableList(new ArrayList<T>(elements));
}

From source file:Main.java

/**
 * Crates an unmodifiable list filled with the given values.
 * //from  w  w w.j a v a 2s. c o  m
 * @param <T>
 *            the list's element type.
 * @param values
 *            the values.
 * @return the list.
 */
@SafeVarargs
public static <T> List<T> createUnmodifiableList(final T... values) {
    return Collections.unmodifiableList(createArrayList(values));
}

From source file:Main.java

public static <T> List<T> readOnlyCopy(List<T> orig) {
    if (orig.isEmpty())
        return Collections.emptyList();
    if (orig.size() == 1)
        return Collections.singletonList(orig.get(0));
    ArrayList<T> copy = new ArrayList<>(orig.size());
    copy.addAll(orig);// w  w w  . j  a v  a 2s  .co  m
    return Collections.unmodifiableList(copy);
}

From source file:Main.java

public static final <T> List<T> collect(Iterator<? extends T> it) {
    ArrayList<T> r = new ArrayList<T>();
    while (it.hasNext())
        r.add(it.next());//from  w w w. j av a 2  s  . c o  m
    return Collections.unmodifiableList(r);
}

From source file:Main.java

public static ArrayList<Pattern> createArrayListPFromStringArray(final String[] regexArray) {
    final ArrayList<Pattern> returnPatternsList = new ArrayList<Pattern>();
    for (int j = 0; j < regexArray.length; j++) {
        returnPatternsList.add(Pattern.compile(regexArray[j], Pattern.DOTALL));
    }/*from  w  ww  .ja  v  a 2s . c o m*/
    return new ArrayList<Pattern>(Collections.unmodifiableList(returnPatternsList));
}

From source file:Main.java

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

    Map<K, List<?>> result = copyNullSafeMutableHashMap(map);
    for (Map.Entry<K, List<?>> entry : result.entrySet()) {
        List<?> value = entry.getValue();
        entry.setValue(Collections.unmodifiableList(new ArrayList<Object>(value)));
    }/*  w ww  .j av a2 s  .  c  o m*/
    return result;
}

From source file:Main.java

public static <T> List<T> toImmutableList(final Collection<T> c) {
    if (c.isEmpty()) {
        return Collections.emptyList();
    } else {/*  w ww. ja v  a 2s  . c om*/
        return Collections.unmodifiableList(new ArrayList<T>(c));
    }
}