Example usage for java.util Map containsKey

Introduction

In this page you can find the example usage for java.util Map containsKey.

Prototype

boolean containsKey(Object key);

Source Link

Document

Returns true if this map contains a mapping for the specified key.

Usage

From source file:de.hybris.platform.acceleratorstorefrontcommons.controllers.util.GlobalMessages.java

public static void addMessage(final Model model, final String messageHolder, final String messageKey,
        final Object[] attributes) {
    final GlobalMessage message = new GlobalMessage();
    message.setCode(messageKey);/*  w w w. j a  v a  2  s.  com*/
    message.setAttributes(attributes != null ? Arrays.asList(attributes) : Collections.emptyList());

    final Map<String, Object> modelMap = model.asMap();
    if (modelMap.containsKey(messageHolder)) {
        final List<GlobalMessage> messages = new ArrayList<>((List<GlobalMessage>) modelMap.get(messageHolder));
        messages.add(message);
        model.addAttribute(messageHolder, messages);
    } else {
        model.addAttribute(messageHolder, Collections.singletonList(message));
    }
}

From source file:Main.java

public static <K extends Object, T extends Object> T getFirst(Map<K, T> map, K... keys) {
    if (map == null)
        return null;
    for (K key : keys) {
        if (map.containsKey(key))
            return map.get(key);
    }/*from   w w  w  .  j  av a2s.c  o m*/
    return null;
}

From source file:com.exxonmobile.ace.hybris.storefront.controllers.util.GlobalMessages.java

public static void addMessage(final Model model, final String messageHolder, final String messageKey,
        final Object[] attributes) {
    final GlobalMessage message = new GlobalMessage();
    message.setCode(messageKey);/* w  w w .  j  a va 2 s.c  o m*/
    message.setAttributes(attributes != null ? Arrays.asList(attributes) : Collections.emptyList());

    final Map<String, Object> modelMap = model.asMap();
    if (modelMap.containsKey(messageHolder)) {
        final List<GlobalMessage> messages = new ArrayList<GlobalMessage>(
                (List<GlobalMessage>) modelMap.get(messageHolder));
        messages.add(message);
        model.addAttribute(messageHolder, messages);
    } else {
        model.addAttribute(messageHolder, Collections.singletonList(message));
    }
}

From source file:Main.java

/**
 * Returns a list of the values of the selected elements from an input map. 
 * It is not backed in the input map, thus changes in this list are not 
 * reflected in the input map.//  w  w  w  . j  ava  2  s .c  o m
 *
 * @param <A> Key type
 * @param <B> Value type
 * @param map Input map
 * @param keys Keys of the elements to be selected
 * @return List of the values associated to the input indexes (in iteration order)
 */
public static <A, B> List<B> select(Map<A, B> map, Collection<A> keys) {
    List<B> out = new LinkedList<B>();
    for (A key : keys)
        if (map.containsKey(key))
            out.add(map.get(key));

    return out;
}

From source file:Main.java

public static <K, V> void addKeyValue(Map<K, List<V>> multiMap, K key, V value) {
    if (key != null) {
        List<V> values;//from ww  w  .java 2  s.c o m
        if (multiMap.containsKey(key)) {
            values = multiMap.get(key);
        } else {
            values = new ArrayList<V>();
            multiMap.put(key, values);
        }
        values.add(value);
    }
}

From source file:Main.java

/**
 * Returns the first object in the {@link Map} whose key <b>is represented
 * by or starts with some of the characters of the specified seed</b>. This
 * method allows developers to simulate a reverse {@code startsWith}
 * operation in a {@code Map}. That is, the map key only contains some of
 * the initial characters in the seed./*from w w w  .  j  a  v  a 2 s .  c o m*/
 * <p>
 * If the map contains a complete key represented by the {@code seed}
 * parameter, such a value will be returned. Otherwise, the method will go
 * trough all the map entries looking for the first key whose characters
 * match the specified seed. If none of the keys match the seed in any way,
 * the default value will be returned. For example:
 * 
 * <pre>
 * String seed = "prefix_mapentry";
 * Map<String, String> map = new HashMap<>();
 * 
 * map.put("first.key", "1");
 * map.put("prefix_", "2");
 * map.put("third.key", "3");
 * 
 * System.out.println(getMapValue(map, seed, null));
 * </pre>
 * 
 * The following value will be printed:
 * 
 * <pre>
 * 2
 * </pre>
 * 
 * @param map
 *            - The map containing the elements to inspect.
 * @param seed
 *            - The key of the value to return.
 * @param defaultValue
 *            - The default value to return in case the key doesn't match an
 *            entry in the map.
 * @return The value mapped to the specified key, or the default value.
 */
public static <T> T getMapValue(final Map<String, T> map, final String seed, T defaultValue) {
    if (map.containsKey(seed)) {
        return map.get(seed);
    } else {
        for (Map.Entry<String, T> entry : map.entrySet()) {
            if (seed.startsWith(entry.getKey())) {
                return entry.getValue();
            }
        }
    }
    return defaultValue;
}

From source file:carmen.utils.Utils.java

@SuppressWarnings("unchecked")
public static Map<String, Object> getPlaceFromTweet(Map<String, Object> tweet) {
    if (tweet.containsKey(Constants.PLACE))
        return (Map<String, Object>) tweet.get(Constants.PLACE);
    return null;//from   w  w w  .  j  a v a 2  s . co m
}

From source file:carmen.utils.Utils.java

@SuppressWarnings("unchecked")
public static Map<String, Object> getUserFromTweet(Map<String, Object> tweet) {
    if (tweet.containsKey(Constants.TWEET_USER))
        return (Map<String, Object>) tweet.get(Constants.TWEET_USER);
    return null;/*from ww  w.j a v  a2  s .  co  m*/
}

From source file:Main.java

/**
 *  Retrieves the first value of a MultiMap index
 *  @param multiMap (Map<String,LinkedList<String>>)
 *  @param index (String)/*from   ww  w.  ja  v a  2 s. c om*/
 *  @return String
 **/
public static String popMultiMap(Map<String, LinkedList<String>> multiMap, String key) {
    if (multiMap == null)
        return (null);

    if (multiMap.containsKey(key)) {
        LinkedList<String> list = multiMap.get(key);
        if (list != null) {
            return (list.pop());
        } else {
            return (null);
        }
    } else {
        return (null);
    }
}

From source file:Main.java

/**
 * Removes any keys not found in the element collection provided in this method
 * @param map/*w w w  .ja  v a  2  s  .  c  om*/
 * @param keysToKeep
 * @return
 */
public static <K, V> Map<K, V> filterKeys(Map<K, V> map, K... keysToKeep) {
    Map<K, V> filteredMap = new HashMap<K, V>();
    for (K key : keysToKeep) {
        if (map.containsKey(key)) {
            filteredMap.put(key, map.get(key));
        }
    }
    return filteredMap;
}