Example usage for java.util Collections unmodifiableMap

Introduction

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

Prototype

public static <K, V> Map<K, V> unmodifiableMap(Map<? extends K, ? extends V> m)

Source Link

Document

Returns an unmodifiable view of the specified map.

Usage

From source file:Main.java

public static <T, K> Map<T, K> newReadOnlyMap(Map<T, K> map) {
    return Collections.unmodifiableMap(new HashMap<>(nullAsEmpty(map)));
}

From source file:Main.java

/**
 * @return an <b>UNMODIFIABLE</b> Map&lt;K, V&gt;
 *///from ww  w .j av a  2 s  .  co  m
public static <K, V> Map<K, V> unmodifiableMap(final Map<? extends K, ? extends V> m) {
    return (m == null) ? Collections.<K, V>emptyMap() : Collections.unmodifiableMap(m);
}

From source file:io.github.carlomicieli.footballdb.starter.utils.MapUtils.java

public static <K, V> Map<K, V> asMap(K k, V v) {
    Map<K, V> m = new HashMap<>();
    m.put(k, v);/*from   ww w .ja v  a  2s.co m*/
    return Collections.unmodifiableMap(m);
}

From source file:Main.java

/**
 * @param entries/* w ww .j  av a2  s  . c o m*/
 *                the <i>final</i> set of entries to add to the newly created
 * <i>unmodifiable</i> map
 * @param <K>     the key type
 * @param <V>     the value type
 *
 * @return an <i>unmodifiable</i> map with all given entries
 */
@SafeVarargs
@SuppressWarnings("varargs")
public static <K, V> Map<K, V> map(Entry<K, V>... entries) {
    return Collections
            .unmodifiableMap(Arrays.stream(entries).collect(Collectors.toMap(Entry::getKey, Entry::getValue)));
}

From source file:Maps.java

public static <K, V> Map<K, V> normalizeUnmodifiable(Map<K, V> map) {
    if (map.size() < 2) {
        return normalize(map);
    } else {//from   w w w .ja  v  a 2 s  . c  o m
        // TODO: implement an UnmodifiableHashMap?
        return Collections.unmodifiableMap(normalize(map));
    }
}

From source file:Main.java

public static Map narrowUnmodifiableMap(Map m) {
    if (m instanceof SortedMap)
        return Collections.unmodifiableSortedMap((SortedMap) m);
    else// w  w  w  . ja v  a 2 s.  c  o m
        return Collections.unmodifiableMap(m);
}

From source file:Main.java

/**
 * Protect the map. It returns a unmodifiable view of the given map. The map collection is not modified.
 *
 * @param map The map to protect.//from  w  ww  .j a  v a 2 s.c om
 * @param <K> The type of key.
 * @param <V> The type of value.
 *
 * @return The protected Map.
 */
public static <K, V> Map<K, V> protect(Map<K, V> map) {
    return Collections.unmodifiableMap(map);
}

From source file:Main.java

/**
 * Wraps a Map with the {@code Collections.unmodifiableMap}, but only once.
 *
 * <p>Checks the {@link Map} passed to ensure that it is not already a {@code Collections.unmodifiableMap}.
 * If the parameter is a null or empty, then it returns {@code Collections.emptyMap}.
 *
 * @param map {@link Map} to wrap with {@code Collections.unmodifiableMap}
 * @param <K> Key type//w  w w.  j a va 2s .com
 * @param <V> Value type
 * @return An unmodifiable Map
 */
public static <K, V> Map<K, V> unmodifiableMap(final Map<K, V> map) {
    if (isNotEmpty(map)) {
        if (!(exampleUnmodifiableMap.getClass().equals(map.getClass()))) {
            return Collections.unmodifiableMap(map);
        }
        return map;
    }
    return Collections.emptyMap();
}

From source file:com.dinochiesa.edgecallouts.util.CalloutUtil.java

public static Map<String, String> genericizeMap(Map properties) {
    // convert an untyped Map to a generic map
    Map<String, String> m = new HashMap<String, String>();
    Iterator iterator = properties.keySet().iterator();
    while (iterator.hasNext()) {
        Object key = iterator.next();
        Object value = properties.get(key);
        if ((key instanceof String) && (value instanceof String)) {
            m.put((String) key, (String) value);
        }// www  .  j  av  a2 s. c  om
    }
    return Collections.unmodifiableMap(m);
}

From source file:com.hp.autonomy.frontend.configuration.ValidationResults.java

private ValidationResults(final Map<String, ValidationResult<?>> map) {
    this.map = Collections.unmodifiableMap(map);
    boolean valid = true;

    for (final ValidationResult<?> result : map.values()) {
        valid = valid && result.isValid();
    }//from   w w  w . ja v  a  2 s . c om

    this.valid = valid;
}