Example usage for java.util Map isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this map contains no key-value mappings.

Usage

From source file:RenderingUtils.java

private static Map installDesktopHints(Graphics2D g2) {
    Map oldRenderingHints = null;

    Map desktopHints = desktopHints(g2);
    if (desktopHints != null && !desktopHints.isEmpty()) {
        oldRenderingHints = new HashMap(desktopHints.size());
        RenderingHints.Key key;
        for (Iterator i = desktopHints.keySet().iterator(); i.hasNext();) {
            key = (RenderingHints.Key) i.next();
            oldRenderingHints.put(key, g2.getRenderingHint(key));
        }//w  w  w. ja  v a 2 s .c  o m
        g2.addRenderingHints(desktopHints);
    }

    return oldRenderingHints;
}

From source file:net.bitnine.agensgraph.graph.property.JsonObject.java

public static JsonObject create(Map<String, ?> map) {
    if (map == null || map.isEmpty())
        return new JsonObject();

    JsonObject jobj = new JsonObject();
    for (Map.Entry<String, ?> entry : map.entrySet()) {
        String key = entry.getKey();
        if (key == null)
            throw new IllegalArgumentException("'null' key is not allowed in JsonObject");
        Object value = entry.getValue();
        if (isJsonValue(value))
            jobj.put(key, value);/* w  ww .  jav a2  s.c om*/
        else
            throw new IllegalArgumentException("invalid json value type");
    }

    return jobj;
}

From source file:ee.ria.xroad.common.util.MimeUtils.java

/**
 * Converts a map of header key-values to header array with colon-separated values.
 * @param headers the map of header key-values
 * @return array of color-separated Strings
 *///from w w w.j  a va  2 s .  co  m
public static String[] toHeaders(Map<String, String> headers) {
    if (headers != null && !headers.isEmpty()) {
        return headers.entrySet().stream().map(e -> e.getKey() + ": " + e.getValue())
                .collect(Collectors.toList()).toArray(new String[] {});
    } else {
        return null;
    }
}

From source file:com.jlfex.hermes.common.utils.CollectionUtil.java

/**
 * ?./*from  w w  w .j a v  a 2  s.  c  o m*/
 */
@SuppressWarnings("rawtypes")
public static boolean isEmpty(Map map) {
    return (map == null) || map.isEmpty();
}

From source file:com.kwoksys.framework.util.StringUtils.java

/**
 * Joins a list of maps./*  w w  w .  j a  va 2  s. c o m*/
 *
 * @param list
 * @param token
 * @return ..
 */
public static String join(List<Map> maps, String key, String token) {
    StringBuilder buffer = new StringBuilder();
    boolean appendToken = false;

    for (Map map : maps) {
        if (!map.isEmpty()) {
            if (appendToken) {
                buffer.append(token);
            }
            buffer.append(map.get(key));
            appendToken = true;
        }
    }
    return buffer.toString();
}

From source file:Main.java

public static <K, V> Map<K, V> unmodifiableMap(final Map<? extends K, ? extends V> m, final boolean newMap,
        final boolean emptyAsNull) {
    if (m == null) {
        return null;
    }//  ww w .  j a v a2 s.co m

    if (emptyAsNull && m.isEmpty()) {
        return null;
    }

    return Collections.unmodifiableMap(newMap ? new HashMap<>(m) : m);
}

From source file:com.astamuse.asta4d.web.dispatch.RedirectUtil.java

public static void addFlashScopeData(Map<String, Object> flashScopeData) {
    if (flashScopeData == null || flashScopeData.isEmpty()) {
        return;/* w ww.  j ava 2 s .c o  m*/
    }
    WebApplicationContext context = Context.getCurrentThreadContext();
    List<Map<String, Object>> dataList = context.getData(FlashScopeDataListKey);
    if (dataList == null) {
        dataList = new LinkedList<>();
        context.setData(FlashScopeDataListKey, dataList);
    }
    dataList.add(flashScopeData);
}

From source file:Main.java

public static <K, V> Collection<Map<K, V>> filterListMap(Collection<Map<K, V>> unfiltered,
        final Map<K, V> map) {
    return filter(unfiltered, new Predicate<Map<K, V>>() {
        @Override/*  w  w w . ja va 2s .  c o  m*/
        public boolean apply(Map<K, V> input) {
            if (null == map || map.isEmpty())
                return true;
            Iterator<Map.Entry<K, V>> iter = map.entrySet().iterator();
            boolean flag = true;
            while (iter.hasNext()) {
                Map.Entry<K, V> entry = iter.next();
                V iV = input.get(entry.getKey());
                V cV = entry.getValue();
                flag &= Objects.equal(iV, cV);
                if (!flag)
                    break;
            }
            return flag;
        }
    });
}

From source file:org.vader.common.spring.TransactionScope.java

private static ScopeEntry getOrCreateScopeEntry(String name) {
    final Map<String, ScopeEntry> scope = getCurrentScope();
    if (scope.isEmpty()) {
        registerSynchronization();//from   w  ww .  j  a v  a 2s . co m
    }
    final ScopeEntry entry = scope.get(name);
    if (entry != null) {
        return entry;
    }
    final ScopeEntry newEntry = new ScopeEntry();
    scope.put(name, newEntry);
    return newEntry;
}

From source file:com.mmj.app.common.cookie.parser.CookieParser.java

/**
 * CookieName???Cookievalue. ?CookieNameCookieKey
 * /*from   w  ww .  ja va  2 s  . c  om*/
 * @return ?null
 */
public static CookieNameHelper paserCookieValue(CookieNameConfig cookieNameConfig, String cookieValue) {
    String value = StringUtils.trimToNull(cookieValue);
    if (value == null || StringUtils.equalsIgnoreCase("null", value))
        return null;

    // ?
    if (cookieNameConfig.isEncrypt()) {
        value = EncryptBuilder.getInstance().decrypt(value);
    }
    CookieNameHelper cookieNameHelper = new CookieNameHelper(cookieNameConfig.getCookieName(),
            cookieNameConfig);
    // ??Key??,?
    if (cookieNameConfig.isSimpleValue()) {
        cookieNameHelper.parserValue(value);
    } else {
        // ??Value??
        Map<CookieKeyEnum, String> kv = CookieUtils.strToKVMap(value, cookieNameConfig);
        // CookieNameHelper cookieNameHelper = null;
        if (kv != null && !kv.isEmpty())
            cookieNameHelper.parserAllValues(kv);
    }
    return cookieNameHelper;
}