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

/**
 *
 * @param map/*from w w  w  .  j  a v a  2s  . c  o m*/
 * @return
 */
public static boolean isEmpty(Map map) {
    if (null == map) {
        return true;
    } else if (map.isEmpty()) {
        return true;
    }
    return false;
}

From source file:Main.java

@SuppressWarnings("rawtypes")
public static boolean isEmpty(Object array) {
    if (null != array) {
        if (array instanceof List) {
            List list = (List) array;
            if (!list.isEmpty()) {
                return false;
            }/* w w  w . j av  a 2s  .c  o m*/
        } else if (array instanceof Map) {
            Map map = (Map) array;
            if (!map.isEmpty()) {
                return false;
            }
        } else if (array instanceof Object[]) {
            Object[] arr = (Object[]) array;
            if (arr.length > 0) {
                return false;
            }
        }
    }

    return true;
}

From source file:Main.java

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

From source file:Main.java

/**
 * Utility method to check for a not empty {@link Map} including a null check.
 *
 * @param map {@link Map} to test for non empty
 * @param <K> Type of Key in Map//  www  . jav a 2 s  . c o m
 * @param <V> Type of Value in Map
 * @return true if map is not null and has at least one entry.
 */
public static <K, V> boolean isNotEmpty(final Map<K, V> map) {
    return map != null && !map.isEmpty();
}

From source file:Main.java

public static <K, V> String toString(Map<K, V> paramMap) {
    if (paramMap == null)
        return "";
    if (paramMap.isEmpty())
        return "{}";
    StringBuilder localStringBuilder = new StringBuilder();
    Iterator localIterator = paramMap.entrySet().iterator();
    while (localIterator.hasNext()) {
        Map.Entry localEntry = (Map.Entry) localIterator.next();
        Object[] arrayOfObject = new Object[2];
        arrayOfObject[0] = localEntry.getKey().toString();
        arrayOfObject[1] = localEntry.getValue().toString();
        localStringBuilder.append(String.format(", %s -> %s ", arrayOfObject));
    }/*from w w w .j  a  v  a2 s  . co m*/
    return "{" + localStringBuilder.substring(1) + "}";
}

From source file:Main.java

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

From source file:com.github.yongchristophertang.engine.AssertUtils.java

/**
 * Assert a map of <K, V> is not empty.
 *///from  w ww .  j ava  2 s . c  o  m
public static <K, V> void mapNotEmpty(Map<K, V> map, String message) {
    if (map.isEmpty()) {
        throw new IllegalArgumentException(message);
    }
}

From source file:com.zxy.commons.mongodb.MongodbUtils.java

/**
 * ?/* w w  w  .  j a v a 2  s  .  c  om*/
 *
 * @param params params
 * @return Query
 */
public static Query getQuery(Map<String, Object> params) {
    if (params == null || params.isEmpty()) {
        return null;
    }
    List<Criteria> criterias = new ArrayList<>();
    for (Map.Entry<String, Object> entry : params.entrySet()) {
        criterias.add(Criteria.where(entry.getKey()).is(entry.getValue()));
    }
    return new Query(new Criteria().andOperator(criterias.toArray(new Criteria[params.size()])));

}

From source file:Main.java

/**
 * Tells if a given map is null or empty.
 *
 * @param map The map to be evaluated.//ww  w  .  j a v a2 s. c o m
 * @return {@code true} if the given map is null or empty.
 */
public static boolean isEmptyOrNull(final Map<?, ?> map) {
    return map == null || map.isEmpty();
}

From source file:Main.java

public static boolean isNotEmpty(Map<?, ?> map) {
    if (map == null) {
        return false;
    }//from   w w w.ja  va 2 s.co  m
    return !map.isEmpty();
}