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:Main.java

/**
 * Return <code>true</code> if the supplied Map is <code>null</code>
 * or empty. Otherwise, return <code>false</code>.
 *
 * @param map the Map to check/*from ww  w. j  a  v a2s  .  com*/
 * @return whether the given Map is empty
 */
public static boolean isEmpty(Map map) {
    return (map == null || map.isEmpty());
}

From source file:Main.java

/**
 * Check if map is not <tt>null</tt> and empty
 *
 * @param map/*from   ww w  .  j  av a  2  s.  c  o m*/
 *            map to check
 *
 * @return <tt>true</tt>, if map is not null and empty, else <tt>false</tt>
 */
public static <K, V> boolean isEmpty(Map<K, V> map) {
    return map != null && map.isEmpty();
}

From source file:Main.java

/**
 * This is a convenience method that returns true if the specified map is null or empty
 * /* ww  w  . j a v  a2  s .  co  m*/
 * @param <T>
 *            any type of key
 * @param <U>
 *            any type of value
 * @param map
 * @return
 */
public static <T, U> boolean isEmpty(Map<T, U> map) {
    return map == null || map.isEmpty();
}

From source file:Main.java

/**
 * Return true if this map is null or it's empty.
 * //  w  w  w. jav a 2  s  . co  m
 * @param map
 * @return
 */
public static boolean isEmpty(Map<? extends Object, ? extends Object> map) {
    return map == null || map.isEmpty();
}

From source file:org.focusns.common.web.page.config.PageConfigKey.java

public static String generateKey(String path, Map<String, ?> paramsMap) {
    if (paramsMap.isEmpty()) {
        return path;
    }/*  w  w  w  . j a  v a  2s.  c om*/
    //
    StringBuilder sb = new StringBuilder(path);
    for (String paramName : paramsMap.keySet()) {
        if (PARAM_NAMES_EXCLUDE.contains(paramName)) {
            continue;
        }
        //
        String paramValue = String.valueOf(paramsMap.get(paramName));
        if (StringUtils.hasText(paramValue)) {
            sb.append(paramName).append("=").append(paramsMap.get(paramName));
        }
    }
    //
    return sb.toString();
}

From source file:Main.java

public static boolean isEmpty(Map<?, ?>... maps) {
    boolean result = false;

    for (Map<?, ?> map : maps) {
        if (null == map || map.isEmpty()) {
            result = true;//from ww w  .  j a  v  a 2  s. c o  m
            break;
        }
    }

    return result;
}

From source file:Main.java

public static boolean isEmpty(@Nullable final Map<?, ?> aCont) {
    return aCont == null || aCont.isEmpty();
}

From source file:Main.java

public static boolean isNotEmpty(@Nullable final Map<?, ?> aCont) {
    return aCont != null && !aCont.isEmpty();
}

From source file:backtype.storm.messaging.netty.SaslUtils.java

static String getSecretKey(Map conf) {
    if (conf == null || conf.isEmpty())
        return null;

    String secretPayLoad = (String) conf.get(Config.STORM_ZOOKEEPER_TOPOLOGY_AUTH_PAYLOAD);

    return secretPayLoad;
}

From source file:Main.java

/**
 * Checks if is null or empty./*from  ww  w . j a v  a  2  s.  co  m*/
 *
 * @param map
 *            the map
 * @return true, if is empty
 */
public static boolean isEmpty(Map<?, ?> map) {
    return map == null || map.isEmpty();
}