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:Main.java

public static <T, U> void putIfAbsent(Map<T, U> destination, Map<T, U> source) {
    for (Entry<T, U> entry : source.entrySet()) {
        if (!destination.containsKey(entry.getKey())) {
            destination.put(entry.getKey(), entry.getValue());
        }/*www . ja va 2 s  . co m*/
    }
}

From source file:Main.java

public static <K> Map<K, Integer> uniomCounterMap(Map<K, Integer> first, Map<K, Integer> second) {
    Map<K, Integer> ret = new HashMap<K, Integer>(first);
    for (K key : second.keySet()) {
        if (ret.containsKey(key)) {
            ret.put(key, ret.get(key) + second.get(key));
        } else {/*w w  w  .  ja va2s  .c  o m*/
            ret.put(key, second.get(key));
        }
    }
    return ret;
}

From source file:Main.java

public static <K, V> V safeGet(Map<K, V> map, K key) {
    if (map == null) {
        return null;
    } else {//from  w  w  w .j a va  2s  .c om
        return map.containsKey(key) ? map.get(key) : null;
    }
}

From source file:Main.java

public static <K> Map<K, Integer> uniomCounterMap(Map<? extends K, Integer> first,
        Map<? extends K, Integer> second) {
    Map<K, Integer> ret = new HashMap<K, Integer>(first);
    for (K key : second.keySet()) {
        if (ret.containsKey(key)) {
            ret.put(key, ret.get(key) + second.get(key));
        } else {//from   w w w.  java 2  s  .  c o m
            ret.put(key, second.get(key));
        }
    }
    return ret;
}

From source file:com.thoughtworks.go.plugin.access.configrepo.ExportedConfig.java

private static void mustContainHeader(Map<String, String> headers, String key) {
    if (!headers.containsKey(key)) {
        throw new IllegalArgumentException(format("You must provide the response header: `%s`", key));
    }/* ww  w  .  ja  v  a  2s.c om*/

    if (StringUtils.isBlank(headers.get(key))) {
        throw new IllegalArgumentException(format("Response header `%s` cannot be blank", key));
    }
}

From source file:Main.java

/**
 * Returns the object in the {@link Map} specified by its key. If it doesn't
 * exist, returns its default value./*from www  .jav a2  s .co m*/
 * 
 * @param map
 *            - The map containing the elements to inspect.
 * @param key
 *            - The key of the value to return.
 * @param defaultValue
 *            - The default value to return in case the key doesn't match a
 *            value in the map.
 * @return The value mapped to the specified key, or the default value.
 */
@SuppressWarnings("unchecked")
public static <T> T getMapValue(Map<?, ?> map, Object key, T defaultValue) {
    if (!map.containsKey(key)) {
        return defaultValue;
    } else {
        return (T) map.get(key);
    }
}

From source file:com.anrisoftware.sscontrol.scripts.unix.InstallPackages.java

private static Map<String, Object> setupTimeout(Map<String, Object> args) {
    if (!args.containsKey(TIMEOUT)) {
        args.put(TIMEOUT, TIMEOUT_DEFAULT);
    }/*w  w w.  j  a va2  s.  c o m*/
    return args;
}

From source file:Main.java

public static <T, U> void mapMergeAdd(Map<T, List<U>> map, Map<T, List<U>> mapToAdd) {
    for (Map.Entry<T, List<U>> e : mapToAdd.entrySet()) {
        if (!map.containsKey(e.getKey())) {
            map.put(e.getKey(), new ArrayList<U>());
        }/*from   www .  j  ava2  s  .c o  m*/
        map.get(e.getKey()).addAll(e.getValue());
    }
}

From source file:Main.java

/**
 * XML to Object/* w w w . java  2  s  . c  o  m*/
 * @param <T> T
 * @param clazz clazz
 * @param reader reader
 * @return T
 */
@SuppressWarnings("unchecked")
public static <T> T convertToObject(Class<T> clazz, Reader reader) {
    try {
        Map<Class<?>, Unmarshaller> uMap = uMapLocal.get();
        if (!uMap.containsKey(clazz)) {
            JAXBContext jaxbContext = JAXBContext.newInstance(clazz);
            Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
            uMap.put(clazz, unmarshaller);
        }
        return (T) uMap.get(clazz).unmarshal(reader);
    } catch (JAXBException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String urlBuilderForGetMethod(Map<String, String> g_map) {

    StringBuilder sbr = new StringBuilder();
    int i = 0;//from w w  w . ja  v a2s  . co m
    if (g_map.containsKey("url")) {
        sbr.append(g_map.get("url"));
        g_map.remove("url");
    }
    for (String key : g_map.keySet()) {
        if (i != 0) {
            sbr.append("&");
        }
        sbr.append(key + "=" + g_map.get(key));
        i++;
    }
    System.out.println("Builder url = " + sbr.toString());
    return sbr.toString();
}